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Phacelia cloudcroftensis
(Cloudcroft scorpionweed)

[taxon report][distribution map][all photos][line drawing]



Family:

Scientific Name: Phacelia cloudcroftensis N.D. Atwood

Synonyms: None

Vernacular Name: Cloudcroft scorpionweed

R-E-D Code: 3-2-3

Description: Plants robust annuals to about 8 dm tall; stems to 2 cm thick, pubescent and glandular throughout; stem leaves broadly lanceolate, 4-10 cm long, 1.5-5 cm wide, irregularly crenate-dentate or lobed, lower and basal leaves deeply lobed to pinnatifid; inflorescences terminal on main stem and on lateral branches, cymes elongating to 8.5-15 cm in fruit; corolla tubular, pale blue or lavender, 4-4.5 mm long, lobes about 1 mm long, crenate; stamens and style exserted 1-1.7 mm, style bifid three-fourths its length, mostly hispidulous; calyx lobes nearly distinct, 2.5-3.5 mm long in flower, to 5 mm long and 2.5-3.5 mm wide in fruit, usually slightly longer than the capsule; capsule oblong, 4.5-5 mm long, densely short-glandular; seeds 3, dark brown, 3.5-4.3 mm long, 1.2-1.7 mm wide, uniformly pitted, shallowly excavated from the upturned margins, ventral ridge usually corrugated on one side. Flowers July through late September.

Similar Species: Phacelia cloudcroftensis is similar to, and geographically sympatric with, P. texana, but the corolla in P. texana is longer (greater than 4.5 mm) than in P. cloudcroftensis (less than 4.5 mm). Phacelia cloudcroftensis is also a taller, more robust plant of montane habitats than is P. texana, which occurs in desert scrub and arid grasslands. Other montane scorpionweeds sympatric with P. cloudcroftensis are P. alba and P. neomexicana, but both of these have once or twice pinnately divided leaves while P. cloudcroftensis leaves are entire or only pinnatisect near the base of the blade.


Distribution: New Mexico, Otero County, Sacramento Mountains.

Habitat: Disturbed sites in arroyo channels or along roads, in mixed conifer forest down to upper piņon-juniper woodlands, 1,980-2,350 m (6,500-7,700 ft).

Remarks: Presently known only from a few very small populations near Cloudcroft and south of Bent. This annual plant is extremely rare and difficult to find.

Conservation Considerations: Some known occurrences are situated along roads and in the right-of-way of U.S. Highway 82 and thus may be vulnerable to mowing, herbicide application, roadside construction, maintenance, and related disturbances.

Important Literature (*Illustration):

*Atwood, N.D. 2007. Six new species of Phacelia (Hydrophyllaceae) from Arizona and New Mexico. Novon: A Journal for Botanical Nomenclature from the Missouri Botanical Garden 17:403-446.

Roth, D. 2012. Phacelia cloudcroftensis (Cloudcroft scorpion-weed). Status report. Unpublished report prepared by EMNRD-Forestry Division, Santa Fe, NM, for the USFWS, Region 2, Albuquerque, NM.

Information Compiled By: David L. Bleakly, 2010; last updated 2016

Agency Status:
Taxon USFWS State of NM USFS BLM Navajo Nation Natural Heritage NM Global Rank
Phacelia cloudcroftensisSoCSoCSen..S1G1


Photo credits in header Peniocereus greggii var. greggii © T. Todsen,
Lepidospartum burgessii © M. Howard, Argemone pleiacantha ssp. pinnatisecta © R. Sivinski
©2005 New Mexico Rare Plant Technical Council