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Species Considered, but not listed 0-Z

[A-B] [C] [D-E] [F-K] [L-N] [O-P] [Q-S] [T-Z]

Oenothera caespitosa ssp. navajoensis (Onagraceae)
Opuntia davisii (Cactaceae) - This name is synonymous with Cylindropuntia davisii and Opuntia tunicata var. davisii, which has a widespread distribution. The species is apparently monoclonal, or perhaps with two clones, one in theTrans-Pecos region and one more northern. It is found from north central New Mexico to southwestern Oklahoma and northern Chihuahua, Mexico.
Opuntia grahamii (Cactaceae) - This name is synonymous with Opuntia tunicata var. davisii and Grusonia grahamii, a species with a widespread distribution, but peripheral in New Mexico. In New Mexico it is found near the southern state boundary from the Rio Grande to Brokeoff Mountains. It is common in the Trans Pecos area and in northern Mexico.
Opuntia phaeacantha (Cactaceae) - Populations of this species are widespread and common. It is found from southern and western Colorado to southwestern Kansas, southern California, central Utah, Chihuahua and northeastern Sonora, Mexico.
Opuntia tunicata (Cactaceae) - This name is synonymous with Cylindropuntia tunicata. This species does not occur in New Mexico and records may have resulted from a shortening of O. tunicata var. davisii, which is actually O. davisii. The closest Opuntia tunicata are found in Texas.
Opuntia whipplei var. viridiflora (Cactaceae) - This name is synonymous with Opuntia viridiflora and Cylindropuntia viridiflora, which is a rare species.
Opuntia wootonii (Cactaceae)
Orobanche multiflora var. xanthochroa (Orobanchaceae) - This name is synonymous with Conopholis alpina var. mexicana. Distribution is Texas, Colorado, New Mexico and Arizona (USDA).
Ostrya knowltonii (Betulaceae)
Oxalis albicans var. pilosa (Oxalidaceae) - This name is synonymous with Oxalis corniculata var. pilosa, a species whose distribution is peripheral in New Mexico. It is common in Mexico.
Oxalis caerulea (Oxalidaceae)
Oxalis corniculata var. pilosa (Oxalidaceae)
Oxalis pilosa (Oxalidaceae) - This name is synonymous with Oxalis corniculata var. pilosa, a species whose distribution is peripheral in New Mexico. It is common in Mexico.
Packera cynthioides (Asteraceae)
Packera neomexicana var. metcalfei (Asteraceae)
Packera quaerens (Asteraceae)
Papaver kluanense (Papaveraceae) - This name is synoymous with Papaver loconecum var. albescens and Papaver radicatum spp. kluanense, a species with a distribution from Montana to New Mexico.
Parnassia fimbriata (Saxifragaceae) - Populations of this species are common. (The distribution extends over most of western United States, USDA.)
Parthenium alpinum var. alpinus (Asteraceae) - Populations of this species are peripheral in New Mexico, but its distribution ranges as far north as Wyoming.
Pectocarya platycarpa (Boraginaceae) - Populations of this species are peripheral in New Mexico. It is common across the southwestern United States.
Pectocarya recurvata (Boraginaceae) - Populations of this species are peripheral in New Mexico. It is common across the southwestern United States.
Pedicularis angustifolia (Scrophulariaceae) - This species has a widespread distribution in Mexico.
Pedicularis angustissima (Scrophulariaceae) - This name is synonymous with Pedicularis angustifolia.
Pedicularis parryi ssp. mogollonica (Scrophulariaceae)
Pediocactus simpsonii var. minor (Cactaceae) - This species' distribution is widespread northward from central New Mexico to Wyoming.
Pediomelum hypogaeum (Fabaceae) - Populations of this species are common.
Peganum mexicanum (Zygophyllaceae) - Populations of this species are common in Mexico.
Penstemon auriberbis (Scrophulariaceae) - Populations of this species are common in eastern Colorado.
Penstemon breviculus (Scrophulariaceae)
Penstemon bridgesii (Scrophulariaceae) - This name is synonymous with Penstemon rostraflorus, a species whose distribution is peripheral in New Mexico, but it is common in Arizona.
Penstemon comarrhenus (Scrophulariaceae) - Populations of this species are peripheral in New Mexico, but common in Utah.
Penstemon dasyphyllus (Scrophulariaceae) - This plant occurs in Arizona, New Mexico, Trans-Pecos and Edwards Plateau, Texas, and Chihuahua, Mexico. It is not tracked as rare by the Arizona Heritage Data Management System or the Texas Conservation Data Center. The New York Botanical Garden has 18 specimens well scattered within the range of the species.
Penstemon deaveri (Scrophulariaceae)
Penstemon gracilis (Scrophulariaceae) - This plant occurs in 13 states in the Rocky Mountains, northern Great Plains, and upper Midwest. It is peripheral in New Mexico.
Penstemon lanceolatus (Scrophulariaceae) - Penstemon ramosus, which was formerly considered a New Mexico rare plant, is a synonym of this species. The distribution and abundance of Penstemon lanceolatus from Tamaulipas, Mexico, to southeastern Arizona is too great to be considered rare.
Penstemon lentus (Scrophulariaceae)
Penstemon parviflorus (Scrophulariaceae) - This plant is known only from the type specimen collected in 1890 near Mancos, Montezuma County, Colorado. The identity of the one old New Mexico specimen is questionable. Most sources consider this species to be a Colorado endemic.
Penstemon pulchellus (Scrophulariaceae) - This is a synonym of Penstemon campanulatus, which is a semi-evergreen perennial from Central America. The exact locality of "near the US/Mexico border" for the type specimen of Penstemon pulchellus is unresolved so its presence in New Mexico is uncertain.
Penstemon ramosus (Scrophulariaceae)
Penstemon superbus (Scrophulariaceae)
Pentagramma triangularis ssp. maxonii (Adiantaceae) - Populations of this species are common in Arizona, southern California, southwest New Mexico, and Sonora and Baja California, Mexico.
Perezia thurberi (Asteraceae) - Populations of this species are common in Chihuahua, Mexico.
Petalostemum multiflorus (Fabaceae)
Phacelia bombycina (Hydrophyllaceae) - This species is a winter annual. Distribution is New Mexico and Arizona (USDA).
Phacelia depauperata (Hydrophyllaceae) - This name is synonymous with Phacelia popei. Distribution is New Mexico and Texas (USDA).
Phacelia integrifolia var. texana (Hydrophyllaceae)
Phacelia intermedia (Hydrophyllaceae) - Populations of this species are widespread and common.
Phacelia neomexicana (Hydrophyllaceae)
Phacelia pinkavae (Hydrophyllaceae) - This species was named by Atwood and Welsh in Novon 17:403-416 (2007). Plants of this species were previously identified as P. integrifolia. It has a range from eastern Arizona and southwestern New Mexico to the Jemez Mountains in north-central New Mexico. It is common within its range.
Phacelia rupestris (Hydrophyllaceae) - Populations of this species are common.
Phacelia splendens (Hydrophyllaceae)
Phacelia tenuipes (Hydrophyllaceae) - This name is synonymous with Phacelia bombycina.
Phanerophlebia auriculata (Aspleniaceae) - Distribution of this species is widespread from the Sierra Madre Occidental to the San Mateo Mountains in New Mexico. It is also found in Arizona and western Texas.
Philadelphus argenteus (Hydrangeaceae)
Philadelphus hitchcockianus (Hydrangeaceae)
Philadelphus madrensis (Hydrangeaceae)
Philadelphus mearnsii (Hydrangeaceae)
Philadelphus occidentalis (Hydrangeaceae)
Philadelphus serpyllifolius (Hydrangeaceae)
Philadelphus wootonii (Hydrangeaceae)
Phlox austromontana (Polemoniaceae)
Physaria gordonii ssp. densifolia (Brassicaceae)
Physalis virginiana var.campaniforma (Fabaceae) - According to B. Sivinski, Physalis virginiana is a very rare species in NM – having been collected only a couple times in the upper Pecos River basin by Paul Standley in 1908 (all the many other specimens he has seen in NM herbaria labelled as this species were misidentified samples of something more common.) It has not been seen again in that area despite recent efforts to relocate it. Physalis virginiana is a common plant in central and eastern North America, but this more than a century-old collection in the Pecos basin was also the only time the species has been collected in New Mexico. Waterfall (1958) subsequently monographed the United States species in the genus Physalis and found the New Mexico specimen sufficiently distinct to make it a new variety – P. virginiana var. campaniforma.Unfortunately, his description of this new taxon is not especially helpful in distinguishing it from the more widespread variety virginiana. The only salient difference given is a campanulate (bell-shaped) calyx when var. campaniforma is in flower, which is a slight difference from the usually funnelshaped calyx of var. virginiana. Waterfall gives calyx measurements of var. campaniforma as 5 mm at the base and 1.5-2.0 cm at the spreading tips. The digital images (available on the Internet) of Standley’s (type) specimens at the New York and Missouri Botanical Gardens, however, have much smaller calyces that are only 1 cm across the spreading tips, which are similar in size to normal var. virginiana. A duplicate of Standley’s paratype at UNM also has these smaller calyces. A couple years ago Sivinski found two clonal patches of about a dozen stems each of P. virginiana in the Sapello Valley between Las Vegas and Mora in burned ponderosa pine forest. The fresh calyces of these plants were not especially campanulate or broad, but become more so when pressed and dried as a specimen. Therefore, they are somewhat similar to Stanley’s 1908 collections and could be called var. campaniforma. The Internet also now has numerous photos of eastern P. virginiana that show quite a range of variation for the species. B. Sivinski thinks that var. campaniforma is not a worthwhile taxon and should be a synonym of the more common var. virginiana. The species is very rare in NM, but common and quite variable further east.
Physostegia praemorsa (Lamiaceae) - This name is synonymous with Physostegia virginiana ssp. praemorsa. Populations in New Mexico are disjunct. It is widespread across east central United States.
Pilostyles thurberi (Rafflesiaceae) - Populations of this species occur peripherally in New Mexico, but it is abundant to the west.
Pinaropappus parvus (Asteraceae) - The distribution of this species extends through the Sierra Madre Occidental.
Pinus edulis var. fallax (Pinaceae) - This species requires further study.
Pinus engelmannii (Pinaceae) - Populations of this species occur peripherally in New Mexico, but it is common in the Sierra Madre Occidental.
Pityrogramma triangularis (Adiantaceae) - This name is synonymous with Pentagramma triangularis.
Platyschkuhria integrifolia (Asteraceae) - Populations of this species are common throughout the Colorado Plateau.
Poa tracyi (Poaceae)
Podistera eastwoodiae (Apiaceae)
Polanisia jamesii (Capparidaceae) - Populations of this species occur peripherally in New Mexico. The distribution ranges as far north as Minnesota (USDA). It is common in sand dunes as far west as Fort Sumner.
Polygonatum cobrense (Liliaceae)
Porophyllum gracile (Asteraceae) - This plant is found in six states in the Southwest from Texas to California. There are 134 observations for California given at www.CalFlora.org.
Porophyllum ruderale ssp. macrocephalum (Asteraceae)
Potentilla oblanceolata (Rosaceae)
Potentilla subviscosa (Rosaceae)
Primula ellisiae (Primulaceae)
Proboscidea sabulosa (Pedaliaceae)
Pseudoclappia arenaria (Apiaceae) - This plant occurs in New Mexico, Texas, and Oklahoma. In New Mexico, it occurs in seven counties in the central and south-central part of the state. It has Heritage Program rankings of S3 in New Mexico, S2 in Texas, and S1 in Oklahoma.
Pseudocymopteris longiratiatus (Apiaceae)
Pyrola minor (Pyrolaceae) - This plant is widespread in the northern states and Canada. It is peripheral in New Mexico.
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Quercus muhlenbergii (Fagaceae) - This plant occurs in the entire eastern U.S. It is peripheral in New Mexico.
Quercus toumeyi (Fagaceae) - The distribution of this plant given in Flora of North America is southeastern Arizona, southwestern and south-central New Mexico, extreme western Texas, and Sonora and Chihuahua Mexico. Its New Mexico Heritage rank is S4. It is not uncommon within its range.
Ranunculus abortivus (Ranunculaceae) - This plant occurs throughout Canada and most of the U.S. It is peripheral in New Mexico.
Rhamnus smithii ssp. fasciculata (Rhamnaceae) - This name is a synonym of Rhamnus serrata var. serrata, which has a distribution of Arizona, New Mexico, Texas, and New Mexico. In New Mexico, it is widely scattered in the south-central and northeastern parts of the state. It occurs throughut the Sierra Madre Oriental in Mexico.
Rhamnus smithii ssp. smithii (Rhamnaceae) - This plant occurs in Colorado and New Mexico. The COLO herbarium has specimens from five counties widely scattered in the state. This attractive evergreen shrub is commonly cultivated.
Ribes pinetorum (Grossulariaceae) - This plant occurs in Arizona and New Mexico. The distribution in Arizona given in Kearney and Peebles is Apache, Navajo, and Coconino counties south to Cochise and Pima counties. It is said to be, The most abundant species [of Ribes] in the mountains of southern Arizona..."
Rorippa tenerrima (Brassicaceae) - This plant occurs in 13 states in the Northwest, Rockies, and northern Great Plains. It is peripheral in New Mexico.
Rorippa truncata (Brassicaceae) - This name is a synonym of Rorippa curvipes var. truncata, which occurs throughout the western U.S.
Rosa standleyi (Rosaceae) - This name is a synonym of Rosa woodsii var. woodsii, which occurs in 13 states in the Great Plains, upper Midwest, and Southwest.
Rosa stellata ssp. mirifica (Rosaceae)
Rosa woodsii (Rosaceae) - This plant occurs throughout the western U.S. and Canada.
Rubus exrubicundus (Rosaceae)
Rubus procerus (Rosaceae) - This name is a synonym of Rubus discolor, which occurs in 12 eastern and 8 western states. It is peripheral in New Mexico.
Sageretia wrightii (Rhamnaceae)
Salix glauca (Salicaceae) - This plant occurs throughout Canada and the Rocky Mountain states in the U.S. It is peripheral in New Mexico.
Salvia davidsonii (Lamiaceae) - This plant occurs in Arizona and New Mexico. It in only in Hidalgo County in New Mexico. The distribution given for Arizona in Kearney and Peebles is Havasu Canyon (western Coconino County), and Greenlee, eastern Maricopa, and Cochise counties, which is a broad distribution. The Heritage ranks are S2 for both states.
Salvia earlei (Lamiaceae) - This name is a synonym of Salvia farinacea, which occurs in southern New Mexico, southwestern Oklahoma, and western Texas as far east as the Hill Country. This plant is widely cultivated, which may explain disjunct occurrences reported for Connecticut, Ohio, Florida, and Louisiana.
Salvia lemmonii (Lamiaceae) - This plant occurs in southern Arizona, southwestern New Mexico, and Mexico. It is apparently fairly common within its range in Arizona because it is not tracked as a rare plant by the Arizona Heritage Data Management System.
Satureja arkansana (Lamiaceae) - This name is a synonym of Calamintha arkansana, which has a broad range from the Midwest through the southern Great Plains. It is peripheral in New Mexico.
Saxifraga cernua (Saxifragaceae)
Saxifraga cespitosa (Saxifragaceae)
Saxifraga chrysantha (Saxifragaceae)
Saxifraga debilis (Saxifragaceae)
Saxifraga flagellaris ssp. crandallii (Saxifragaceae)
Schistophragma intermedia (Scrophulariaceae) - This plant occurs in southeastern Arizona (Gila, Greenlee, Cochise, Santa Cruz, and Pima counties), southwestern New Mexico (Catron and Grant counties), and northern Mexico. It is apparently fairly common within its range in Arizona because it is not tracked as rare by the Arizona Heritage Data Management System.
Schkuhria anthemoidea (Asteraceae) - This name is a synonym of Schkuhria pinnata var. wislizeni, which ranges from Texas to Arizona south to Central America.
Schkuhria wislizeni var. wrightii (Asteraceae) - This name is a synonym of Schkuhria pinnata var. wislizeni, which ranges from Texas to Arizona south to Central America.
Sclerocactus cloveriae ssp. cloveriae (Cactaceae)
Sclerocactus intertextus (Cactaceae) - Sclerocactus intertextus (Engelmann) N.P. Taylor comes from the basionym Echinocactus intertextus Engelmann. Other synonyms are Echinomastus intertextus (Engelmann) Britton and Rose, and Neolloydia intertexta (Engelmann) L. Benson. Its general distribution in the U.S. is the Rio Grande Valley from Albuquerque to just south of El Paso, the Big Bend region in Texas, and extreme southeastern Arizona. It is not a rare plant.
Sclerocactus parviflorus var. intermedius (Cactaceae) - This plant occurs in Arizona, New Mexico, Utah, and Colorado. It occurs in 3 counties in New Mexico, 4 in Arizona, 6 in Utah, and 2 in Colorado. This is a broad distribution with many documented occurrences.
Sclerocactus uncinatus var. wrightii (Cactaceae) - This plant's distribution in the U.S. is southeastern New Mexico and scattered throughout Trans-Pecos Texas. It is not rare.
Sclerocactus whipplei (Cactaceae) - This plant occurs in Arizona and at one location near Bluff, Utah. It is not known from New Mexico as the species is currently understood.
Sclerocactus whipplei var. heilii (Cactaceae) - This name is a synonym of Sclerocactus cloveriae ssp. cloveriae.
Sclerocactus whipplei var. reevsii (Cactaceae) - This name is a synonym of Sclerocactus cloveriae ssp. cloveriae.
Scrophularia lanceolata (Scrophulariaceae) - This plant occurs throughout Canada and the U.S., except parts of the Southeast and Southwest. It is peripheral in New Mexico.
Scrophularia montana (Scrophulariaceae) - This plant is endemic to New Mexico, but it occurs in mountains in 13 counties from the north-central to southwestern part of the state. Its Heritage Program rank is S4.
Scrophularia parviflora (Scrophulariaceae) - This plant occurs in Arizona and New Mexico. It occurs in Catron and Grant counties in New Mexico and from Coconino and Mohave to Cochise and Pima counties in Arizona. It is stated in Kearney and Peebles to be, "...common in rich soils in coniferous forests..."
Selaginella pilifera (Selaginellaceae)
Selaginella weatherbiana (Selaginellaceae)
Selinocarpus diffusus (Nyctaginaceae) - This plant occurs in Utah, New Mexico, Texas, and Oklahoma. It is widespread across west-central and east-central New Mexico, southward to extreme western Texas along the Rio Grande, and east to the High Plains of west Texas and extreme southwestern Oklahoma. It is not tracked as a rare Texas plant by the Texas Conservation Data Center.
Selinocarpus lanceolatus (Nyctaginaceae) - This plant occurs in six counties in New Mexico and Trans-Pecos Texas. It is restricted to gypsum soils, but not rare within its habitat.
Senecio cynthioides (Asteraceae) - This name is synonymous with Packera cynthioides.
Senecio neomexicanus var. metcalfei (Asteraceae) - This name is synonymous with Packera neomexicana var. metcalfei.
Senecio salignus (Asteraceae) - This plant occurs from southern Arizona, southwestern New Mexico, and Texas to Guatemala. It is peripheral in New Mexico and not tracked as rare in either Arizona or Texas by those Heritage Programs.
Senecio sanguisorboides (Asteraceae) - This plant is endemic to New Mexico. It occurs in the mountains in eight counties in the north-central, south-central, and southwestern parts of the state. Its Heritage Program rank is G3G4.
Sibara grisea (Brassicaceae)
Sicyos glaber (Cucurbitaceae) - This plant occurs in New Mexico and Texas. In New Mexico it occurs only in the Organ Mountains; in Texas, it occurs in the Trans-Pecos region. It has a Heritage Program rank of S1S2 for New Mexico and S3 for Texas.
Sidalcea candida (Malvaceae) - This plant occurs in Nevada, Utah, Wyoming, Colorado, and New Mexico. It is in 22 counties in Utah and 9 in New Mexico. It is apparently less frequent in the other states. Plants are localized in wetland habitats, but not rare.
Sisyrinchium arizonicum (Liliaceae)
Solanum fendleri (Solanaceae) - This plant occurs in the mountains of western Texas, six counties in mostly southern New Mexico, and five counties in southeastern Arizona. Its New Mexico Heritage Program rank is S4; it is not tracked as rare in either Arizona and Texas. This plant is a close relative of cultivated potatoes and is maintained in potato germplasm banks.
Sphaeralcea emoryi (Malvaceae) - This plant occurs in California, Nevada, Arizona, and New Mexico. It is in the Mojave Desert in California. It occurs mostly below 2,500 ft in elevation in southern Arizona. There are several varieties of this species and Kearney and Peebles state the most common variety, variabilis, "...is especially abundant along roadsides in the irrigated districts." It is peripheral in New Mexico.
Sphaeralcea polychroma (Malvaceae)
Spiranthes magnicamporum (Orchidaceae) - This plant is widely distributed in the Great Plains and Great Lakes regions north to Ontario, Canada. It is peripheral in New Mexico.
Spiranthes parasitica (Orchidaceae) - This name is a synonym of Schiedeella arizonica. See Ronald Coleman's, The Wild Orchids of Arizona and New Mexico for a discussion of the taxonomy. This plant is widely distributed in southeastern Arizona, southwestern and south-central New Mexico, and western Texas. It is an inconspicuous plant that grows in leaf litter in mixed coniferous-deciduous forests.
Spiranthes romanzoffiana (Orchidaceae) - This plant is distributed continuously across Canada and much of the northern U.S., particularly New England, the Great Lakes region, and the Northwest. It is peripheral in New Mexico.
Stachys coccinea (Lamiaceae) - This plant occurs in southeastern Arizona, southwestern New Mexico, western Texas, and Mexico. Its New Mexico Heritage Program rank is S4; it is not tracked as rare by either the Arizona or Texas Heritage Programs.
Stellaria calycantha (Caryophyllaceae) - This plant occurs throughout the western U.S. and Canada. It is peripheral in New Mexico.
Stellaria irrigua (Caryophyllaceae) - This plant occurs in Colorado and New Mexico, and disjunct to Siberia. It is in five counties in southwestern Colorado and one county in New Mexico. It has an S2 Heritage Program rank in Colorado, but is not included in the Colorado Rare Plant Field Guide. It has an S2? Heritage rank in New Mexico.
Stellaria nitens (Caryophyllaceae) - This plant occurs in most of the western U.S. and Canada. It is peripheral in New Mexico.
Stevia micrantha (Asteraceae) - This plant occurs in southeastern Arizona, southwestern New Mexico, and Mexico. It is not tracked as rare by the Arizona Heritage Program. It has a state Heritage Program rank of S3? in New Mexico.
Stipa curvifolia(Poaceae)
Streptanthus carinatus (Brassicaceae) - This plant occurs at widely scattered locations in southeastern Arizona, southern New Mexico, and western Texas. It is described as common for some localities.
Swertia utahensis (Gentianaceae) - This plant occurs in Nevada, Utah, Colorado, Arizona, and New Mexico. It is in six counties in southern Utah and four counties in northern New Mexico. It is not tracked as a rare plant by the Heritage Programs in Nevada, Utah, or Arizona.
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Talinum angustissimum (Portulacaceae)
Talinum aurantiacum (Portulacaceae)
Talinum confertiflorum (Portulacaceae)
Talinum longipes (Portulacaceae)
Talinum validulum (Portulacaceae)
Tetradymia filifolia (Asteraceae) - This endemic species has a widespread distribution in New Mexico from Taos to Otero Counties.
Thelypodiopsis purpusii (Brassicaceae) - Populations of this annual species are common in wet years. U.S. distribution according to USDA, NRCS is Arizona, New Mexico and Texas.
Thelypodiopsis vaseyi (Brassicaceae)
Thysanocarpus amplectens (Brassicaceae) - This name is synonynous with T. curvipes, which has a peripheral distribution in New Mexico, but is widespread to the west, ranging from New Mexico to Washington.
Tidestromia suffruticosa (Amaranthaceae)
Tillandsia recurvata (Bromeliaceae)
Tiquilia gossypina (Boraginaceae) - Distribution of this species is peripheral in New Mexico. U.S. distribution is limited to New Mexico and Texas (USDA, NRCS).
Toumeya papyracantha (Cactaceae) - This name is synonymous with Sclerocactus papyracanthus, a species with widespread distribution through central New Mexico to adjacent Texas. Disjunct populations range from north central New Mexico to near Grants and Clines Corners, south to near the Mexican border and Del City, Texas. It is also found in the vicinity of Holbrook and southward to near the Mogollon Rim area in Arizona.
Townsendia rothrockii (Asteraceae) - There are no known specimens of this species from New Mexico.
Tradescantia wrightii (Commelinaceae) - Distribution of this species is widespread from central New Mexico to western Texas.
Trichostema arizonicum (Lamiaceae) - Distribution of this species is widespread from central New Mexico to western Texas.
Trifolium brandegeei (Fabaceae)
Vauquelinia californica ssp. pauciflora (Rosaceae) - This subspecies occurs peripherally in New Mexico; populations are more widespread in the Sierra Madre Occidental.
Verbesina longifolia (Asteraceae) - Populations of this species are widespread in Mexico and Arizona.
Verbesina rothrockii (Asteraceae) - This plant occurs in Arizona, New Mexico, and Coahuila, Mexico. It is not tracked as rare by the Arizona Heritage Program.
Veronica micromeria (Scrophulariaceae) - This name is synonymous with Veronica anagallis-aquatica, a species whose distribution includes most of the continental U.S. and Alaska (USDA, NRCS).
Vicia leucophaea (Fabaceae)
Viola missouriensis (Violaceae) - Distribution of this species is peripheral in New Mexico. It is a common species in the eastern United States.
Viola pedatifida (Violaceae) - This is a common species whose distribution includes most of central U.S. (USDA, NRCS)
Viola viarum var. guadalupensis (Violaceae) - Taxon is awaiting publication.
Vitis berlandieri (Vitaceae)
Vitis bourquiniana (Vitaceae)
Vitis riparia (Vitaceae)
Woodsia cochisensis (Aspleniaceae)
Wyethia arizonica (Asteraceae)
Wyethia scabra (Asteraceae)
Xanthocephalum wrightii (Asteraceae) - Populations of this species are common in Mexico.
Yucca baileyi (Agavaceae) - Populations of this species are widespread in the Four Corners area.
Yucca baileyi var. intermedia (Agavaceae) - Called to our attention for possible addition to the rare list in an E-mail by Bob Sivinski on October 12, 2001. A subsequent E-mail by david Ferguson on November 27, 2001, indicated that var. intermedia is taxonomically doubtful and even if a good variety, it would have too great a range to be considered rare.
Yucca faxoniana (Agavaceae) - Distribution of this species is peripheral in New Mexico. It is common in western Texas and northern Mexico.
Yucca neomexicana (Agavaceae)
Yucca schottii (Agavaceae) - Distribution of this species is peripheral in New Mexico. The range is widespread into adjacent Arizona and Mexico.
Yucca thornberi (Agavaceae) - Populations in New Mexico are peripheral, but the species has a widespread distribution. This name is synonymous with Yucca baccata var. brevifolia whose U.S. distribution is limited to Arizona and New Mexico (USDA, NRCS).
Yucca torreyi (Agavaceae) - This name is possibly synonymous with Y. trichuleana var. macrocarpa, a species whose populations in New Mexico are peripheral, but is common in western Texas and northern Mexico. According to the USDA, NCRS web site, this name is synonymous with Yucca baccata var. macrocarpa and Yucca macrocarpa, a species whose U.S. distribution is New Mexico and Texas. There is no listing for Y. trichuleana var. macrocarpa.
Zephyranthes longifolia (Amaryllidaceae) - Populations of this species are common across southern New Mexico and western Texas.
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Photo credits in header Peniocereus greggii var. greggii © T. Todsen,
Lepidospartum burgessii © M. Howard, Argemone pleiacantha ssp. pinnatisecta © R. Sivinski
Design: J. Mygatt; Copyright © 1999-2005 New Mexico Rare Plant Technical Council