[taxon report][distribution map][all photos][line drawing]
Scientific Name: Draba henrici Al-Shehbaz
Vernacular Name: Henks draba
R-E-D Code: 3-3-3
Description: Perennial herb, not cespitose; caudex few to several branched. Stems (2) 410(12) cm, erect to ascending or rarely subdecumbent. Basal leaves rosulate; petiole 25 mm, usually ciliate, persistent; leaf blade narrowly oblanceolate, 512 Χ 12 mm, both surfaces moderately pubescent with stalked, 4(7)-rayed trichomes, base attenuate, margin entire, apex subobtuse; cauline leaves (8)1016(20), overlapping, lanceolate to oblong or narrowly ovate, entire or rarely denticulate, both surfaces with stalked, non-crisped, 4(7)-rayed trichomes. Racemes ebracteate, 615-flowered, corymbose, elongated in fruit; rachis straight, pubescent with crisped, minutely stalked, 47-rayed trichomes. Sepals green with white margin, ovate, 1.52 mm, ascending, pubescent with crisped, branched trichomes. Petals white, oblanceolate, 33.5 Χ 11.5 mm; filaments white, 1.52 mm. Fruit (immature) narrowly oblong, 68 Χ ca. 1.5 mm, slightly twisted, sessile, divaricate-ascending, not appressed to rachis; valves puberulent with simple and 2(4)-rayed trichomes. Flowers in July to early August.
Similar Species: Draba henrici can be distinguished from other sympatric Drabas by its white flowers and smaller petals.
Distribution: New Mexico, Taos County
Habitat: Alpine tundra above 11,000 ft (3,350m)
Remarks: Not much is known about the actual distribution and abundance of this species. Needs more surveys and documentation in alpine areas.
Conservation Considerations: Only known populations are along trails in remote alpine areas. Limited distribution and high elevation habitats make this species vulnerable to climate change.
Important Literature (*Illustration):
*Al-Shehbaz, I.A. 2013 Draba henrici (Brassicaceae), a new species from northern New Mexico. Harvard Papers in Botany 18 (1): 91-93
Information Compiled By:
Daniela Roth, 2016