Draba densifolia - Nutt.
Denseleaf Whitlow-grass
Other English Common Names: dense-leaved draba
Other Common Names: denseleaf draba
Taxonomic Status: Accepted
Related ITIS Name(s): Draba densifolia Nutt. (TSN 22875)
French Common Names: drave feuillage dense
Unique Identifier: ELEMENT_GLOBAL.2.159845
Element Code: PDBRA110W0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Draba
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Draba densifolia
Taxonomic Comments: This species has been confused at times with D. PAYSONII (Gjaerevoll 1963, B63GJA01AKUS; Mulligan 1971, A71MUL02AKUS) and D. STENOPETALA (Hulten 1941, B41HUL01AKUS; Porsild 1966, B66POR01AKUS), but is now considered distinct from both of these ( Mulligan 1976, A76MUL01AKUS; Hulten 1968, B68HUL01AKUS).
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 30Nov1990
Global Status Last Changed: 05Aug1991
Rounded Global Status: G5 - Secure
Reasons: D. DENSIFOLIA has a moderately widespread range in generally remote habitats. There is little additional information on distribution or abundance.
Nation: United States
National Status: NNR
Nation: Canada
National Status: N2N3 (08Feb2011)

U.S. & Canada State/Province Status
United States Alaska (S1), California (SNR), Idaho (SNR), Montana (S2), Nevada (SNR), Oregon (SNR), Utah (S1S2), Washington (SNR), Wyoming (S2)
Canada Alberta (S1S2), British Columbia (S2S3), Yukon Territory (S1S3)

Other Statuses

Committee on the Status of Endangered Wildlife in Canada (COSEWIC): Candidate (Low) (26Jan2015)

NatureServe Global Conservation Status Factors

Range Extent Comments: Southern British Columbia south to Sierran California, Oregon, Washington, Idaho, Montana, Wyoming, Utah. Widely spaced sites in central and eastern Alaska (Hitchcock 1973). Range in Hulten (1968) appears to be the four collections of Gjaerevoll (1963), three of which have been reidentified to other species.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: Estimate is based on the species range.

Population Size Comments: Estimate, based on range; no direct information about abundance.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Southern British Columbia south to Sierran California, Oregon, Washington, Idaho, Montana, Wyoming, Utah. Widely spaced sites in central and eastern Alaska (Hitchcock 1973). Range in Hulten (1968) appears to be the four collections of Gjaerevoll (1963), three of which have been reidentified to other species.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AK, CA, ID, MT, NV, OR, UT, WA, WY
Canada AB, BC, YT

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
AK Southeast Fairbanks (CA) (02240)
MT Beaverhead (30001), Flathead (30029), Glacier (30035), Jefferson (30043), Lewis and Clark (30049), Park (30067)*, Pondera (30073), Powell (30077), Silver Bow (30093), Sweet Grass (30097)
WY Fremont (56013), Sublette (56035)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
09 St. Marys (09040001)+
10 Red Rock (10020001)+, Jefferson (10020005)+, Boulder (10020006)+, Upper Missouri-Dearborn (10030102)+*, Two Medicine (10030201)+, Upper Yellowstone (10070002)+, Stillwater (10070005)+, Sweetwater (10180006)+
14 Big Sandy (14040104)+
17 Upper Clark Fork (17010201)+, Blackfoot (17010203)+, Middle Fork Flathead (17010207)+
19 White River (19040101)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Dense-leaf Draba is a mat-forming perennial with leaf rosettes at the ends of numerous rootcrown branches, which are clothed with old leaf bases. The leafless stems are 3-15 mm high and arise from some of the rosettes. The fleshy, narrowly lance-shaped leaves are 2-12 mm long and have a prominent midvein and straight, unbranched hairs on the entire margins but are otherwise mostly glabrous. 3-15 stalked flowers are borne at the tops of the stems. Each flower has 4 separate sepals, 4 separate, yellow petals that are 2-6 mm long, and 4 long and 2 short stamens. The style is 0.5-1.0 mm long. The hairy, egg-shaped capsules are 2-7 mm long and are borne on erect or ascending stalks.
Diagnostic Characteristics: There are many similar-appearing, yellow-flowered, mat-forming species of DRABA in our area. A technical manual and hand lens or microscope is required for positive identification. D. DAVIESIAE also has glabrous leaves, except for simple hairs on the margins, but it has glabrous fruits.
Habitat Comments: Alpine tundra and scree slopes; generally on dry sites.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 30Nov1990
NatureServe Conservation Status Factors Author: Williams, C.L.
Element Ecology & Life History Edition Date: 21Oct1994
Element Ecology & Life History Author(s): JM

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Gjaerevoll, O. 1963. Botanical investigations in central Alaska, especially in the White Mts. Part II: Dicotyledons, salicaceae--umbelliferae. Det. Kgl. Norske Videnskabers Selskabs Skrifter 4. 115 p.

  • Hitchcock, C.L., and A. Cronquist. 1973. Flora of the Pacific Northwest: An Illustrated Manual. University of Washington Press, Seattle, Washington. 730 pp.

  • Hulten, E. 1968. Flora of Alaska and neighboring territories. Stanford Univ. Press, Palo Alto, CA. 1008 pp.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Mulligan, G. A. 1976. The genus Draba in Canada and Alaska: key and summary. Canadian Journal of Botany 54:1386-1393.

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