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Agastache rupestris (Greene) Standl.


Family: Lamiaceae

Description: This Agastache differs from others by the following features: the calyx tube is more than 4 mm long, the teeth more that 1/4 the total length of the calyx; stems are suffrutescent with exfoliating bark; mature leaves are lanceolate-linear, 6-15 times longer than wide; the median lobe of the corolla is several-toothed or laciniate.

Distribution: Southwestern New Mexico to central and south-central Arizona.

Plants Seen or Cited: New Mexico; Catron Co.; Gila Natl. For. near Wall Lake, 31 Aug 1980, Hutchins 9170 (UNM); Gila Natl. For., T14S R13W S31, just W of Hwy 25, Sapillo Cr., 30 Jul 1981, Knight 1683 (UNM); Mogollon Mts., on or near the West Fork of the Gila River, Gila Hot Springs, 27 Aug 1903, Metcalfe 878 (NMC); Mogollon Mts., near "Grand Canyon" E. Fork of Gila River, 19 Aug 1900, Wooton s.n. (NMC); Grant Co.; Sapillo Creek 1.2 mi W of Pinos Altos, 20 Sep 1970, Todsen 700920-10 (NMC); Sycamore, 30 mi W of Silver City, 13 Aug 1902, Wooton s.n., (NMC); UNM also has a specimen from the Baboquivari Mts of southern Arizona.; UTEP has two specimens from southern Arizona.

Habitat: On vegetation-covered igneous boulders and sandy soil at base of protected north slopes with Populus, Juglans, Prunus, etc., in the upper oak-savannah, pinyon-juniper or lower Pinus ponderosa zone, 1,500-2,200 m (Sanders 1987); N-facing slope of andesite (Knight 1683); rock and gravel loam of hillside, W slope, 6,300 ft. (Hutchins 9170).

Discussion: Sanders (1987, fig. 93) notes intergrades of this species and A. wrightii (Greenm.) Woot. & Standl. in south-central Arizona near the border and in northeastern Sonora. He suspects that A. rupestris occurs in NE Sonora, but he cites no specimens. A specimen at UTEP from southern Arizona is also a suspected hybrid between the two taxa. Wooton and Standley (1915) record the range as from mountains of southwestern New Mexico. Martin and Hutchins (1981) indicate the species also to be southwestern New Mexico; they also include Arizona. Kearney and Peebles (1969) cite a similar range and provide a discussion of putative hybrids in southern Arizona between A. rupestris and A. wrightii, but note that typical A. rupestris is not at that locality and suggest the possibility of the presence of an undescribed species. Sanders (1987) amplifies the discussion of these Arizona hybrids, but does not suggest the presence of a new taxon. This is a regional endemic that occurs in the mountains. No authors note rarity, and nothing is indicated on collection labels regarding frequency at collection sites. The species is peripheral in New Mexico.

Important Literature:

Kearney, T.H. and R.H. Peebles. 1969. Arizona Flora, 2nd ed. (with supplement by J.T. Howell, Elizabeth McClintock, et al.). Univ. California Press, Berkeley. 1085 pp.

Martin, W.C. and C.R. Hutchins. 1981. A Flora of New Mexico, vol. 2. J. Cramer, Vaduz. Pp. 1277-2591.

Sanders, R.W. 1987. Taxonomy of Agastache section Brittonastrum (Lamiaceae-Nepeteae). Systematic Botany Monographs 15:1-92.

Wooton, E.O. and P.C. Standley. 1915. Flora of New Mexico. Contr. U.S. Natl. Herbarium 19: 1-794.

Information Compiled By: Richard Spellenberg, 1998


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