Draba incrassata
(Rollins) Rollins & R.A. Price
Sweetwater Mountains Draba
G2ImperiledGlobal Rank
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.134893
Element CodePDBRA113G0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCapparales
FamilyBrassicaceae
GenusDraba
SynonymsDraba lemmonii var. incrassataRollins
Concept ReferenceKartesz, 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.
Taxonomic CommentsDraba lemmonii var. incrassata was 3C in Fed. Reg. (85-09-27).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-11-18
Change Date2024-11-18
Edition Date2024-11-18
Edition AuthorsJohnson, J. (2024)
Threat ImpactMedium
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences6 - 20
Rank ReasonsDraba incrassata is a small herb native to the Sweetwater Mountains of eastern California, United States. With a small range, few occurrences, and medium threats from motorized recreation and climate change, this species is imperiled.
Range Extent CommentsDraba incrassata is known only from the alpine areas of the Sweetwater Mountains, California, United States. Range extent was estimated using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1993 and 2024 (GBIF 2024, iNaturalist 2024, CNDDB 2024, CCH2 2024).
Occurrences CommentsBy applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1993 and 2024, it is estimated that there are 6 occurrences rangewide (GBIF 2024, iNaturalist 2024, CNDDB 2024, CCH2 2024).
Threat Impact CommentsDraba incrassata is threatened by moderate levels of off-trail motorized recreation. The barren gravel ridges offer little obstacle to off-road vehicles and tracks are visible across much of the upper slopes (J. Johnson, personal observation). Climate change may affect this species, which is found only at high altitudes on an isolated mountain range.
Ecology & Habitat
Habitat
Draba incrassata grows in alpine talus slopes and fellfields, usually on hydrothermally altered Tertiary volcanic rocks (FNA 2010, Holmgren et. al 2005).
Terrestrial HabitatsAlpineBare rock/talus/scree
Other Nations (1)
United StatesN2
| Province | Rank | Native |
|---|
| California | S2 | Yes |
Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
References (8)
- California Natural Diversity Database (CNDDB). 2024. RareFind Version 5.3.0. California Department of Fish and Game, Sacramento.
- CCH2 Portal. 2024. Consortium of California Herbaria. Online. Available: https//:www.cch2.org/portal/index.php (Accessed 2024).
- Flora of North America Editorial Committee (FNA). 2010. Flora of North America north of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.
- Global Biodiversity Information Facility (GBIF). 2024. <i>Aceria fraxinicola</i> (Nalepa, 1890) in GBIF Secretariat (2023). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2024-06-10.
- GLORIA Great Basin website. 2024. https://www.gloriagreatbasin.org/
- Holmgren, N.H., P.K. Holmgren, and A. Cronquist. 2005. Intermountain flora. Volume 2, part B. Subclass Dilleniidae. The New York Botanical Garden Press. 488 pages.
- iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
- 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.