Draba exunguiculata

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Draba exunguiculata
Status TNC G2.svg
Imperiled  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Brassicales
Family: Brassicaceae
Genus: Draba
Species:
D. exunguiculata
Binomial name
Draba exunguiculata

Draba exunguiculata is a species of flowering plant in the family Brassicaceae known by the common names clawless draba and Grays Peak draba. It is endemic to Colorado in the United States. [1] [2]

This plant is a perennial herb forming a tight clump on the ground. It has a branching caudex and stems just a few centimeters long. It has linear or lance-shaped leaves up to 2.5 centimeters long. The undersides and sometimes the top sides of the leaf blades have tiny hairs. The inflorescence is a raceme of several flowers with yellow petals each up to 3 millimeters long. The plant can be distinguished from Draba grayana , which grows in the same area, by its non-clawed petals and the arrangement of hairs on its stems. [3]

This plant is a Rocky Mountains endemic [2] occurring mostly around Grays Peak and Torreys Peak. [1] It grows in subalpine habitat and alpine tundra at elevations between 11,700 and 14,000 feet. It grows on fellfields and other rocky soils. It sometimes grows under overhanging rock and between boulders that help protect it from the harsh climate. It is usually distributed in small patches of individuals. Other plants in the habitat include similar cushion plants. Species associated with the draba include Deschampsia caespitosa , Acomastylis rossii , Carex rupestris , Lidia obtusiloba , Trifolium nanum , and Lidia biflora . [2]

The main threat to the species is recreational activity, such as hiking and skiing, in the habitat. [1]

Related Research Articles

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Draba aureola is a species of flowering plant in the family Brassicaceae known as the Mt. Lassen draba or Mt. Lassen whitlow-grass. This plant is native to the Cascade Range of western North America, where it grows at elevations above 2000 meters. This is usually a perennial plant found growing in rocky areas such as volcanic cliffs and scree. It has one or more short, stout stems which are covered in stiff hairs. The leaves grow in a dense basal clump at the ground. They are fat and fleshy and covered in a carpetlike coat of stiff, light-colored, branching hairs. The stem may be erect above the clump of leaves or its inflorescence may rest directly upon them. The spherical or club-shaped inflorescence may have up to 80 small, yellow flowers packed densely in it, each petal about 5 millimeters wide. The fruit is a wavy-edged, hairy silique about a centimeter long and half a centimeter wide.

<i>Draba cuneifolia</i> Species of flowering plant

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<i>Draba fladnizensis</i> Species of flowering plant

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<i>Draba globosa</i> Species of flowering plant

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<i>Physaria pruinosa</i> Species of flowering plant

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References

  1. 1 2 3 4 NatureServe (2023). "Draba exunguiculata". Arlington, Virginia. Retrieved 2 December 2023.
  2. 1 2 3 Ladyman, J.A.R. (2004, July 14). Draba exunguiculata (O.E. Schulz) C.L. Hitchcock (Garys Peak draba): a technical conservation assessment. [Online]. USDA Forest Service, Rocky Mountain Region.
  3. Draba exunguiculata. Flora of North America.