Roadless Areas
Home/Species/ San Gabriel Mountains Dudleya

Dudleya densiflora

(Rose) Moran

San Gabriel Mountains Dudleya

G2Imperiled Found in 2 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.134347
Element CodePDCRA040B0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilyCrassulaceae
GenusDudleya
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.
Conservation Status
Rank MethodLegacy Rank calculation - Excel v3.1x
Review Date2012-09-20
Change Date2013-08-20
Edition Date2005-10-25
Edition AuthorsMaybury, K.; M. Martinez (1997), rev. R. Bittman 2005
Threat ImpactHigh
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences1 - 5
Rank Reasons
Endemic to San Gabriel Mountains of Los Angeles County, California. About 5 populations are known to be extant. A few historic populations have been destroyed by mining. Collecting and recreational use are ongoing threats. Formal protection is needed for all known sites.
Range Extent Comments
Endemic to the San Gabriel Mountains, in Los Angeles County, California. The six known populations are found within a 16 square-mile area along the southern face of the mountains.
Occurrences Comments
Six known populations; one is historic.
Threat Impact Comments
A few historic populations have been destroyed by mining; road maintenance and habitat destruction. The sites on USFS lands have minor threats including collecting and recreational use.
Ecology & Habitat

Diagnostic Characteristics

Leaf covered with mealy powder; styles 2-3 mm; pedicel greater than 2 mm; San Gabriel mountains.

Habitat

Steep rocky, granitic cliffs and canyon walls within chaparral, oak woodland, and riparian woodlands.
Terrestrial Habitats
Forest/WoodlandWoodland - HardwoodShrubland/chaparralCliff
Palustrine Habitats
Riparian
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (2)
California (2)
AreaForestAcres
Sheep MountainAngeles National Forest21,098
WestforkAngeles National Forest4,407
References (6)
  1. Flora of North America Editorial Committee (FNA). 2009. Flora of North America north of Mexico. Vol. 8. Magnoliophyta: Paeoniaceae to Ericaceae. Oxford University Press, New York. xxiv + 585 pp.
  2. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  3. 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.
  4. Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.
  5. U.S. Fish and Wildlife Service (USFWS). 1995. Category and Listing Priority Form.
  6. U.S. Fish and Wildlife Service (USFWS). 1997. Notice of reclassification of ten candidate taxa. Federal Register 62(182): 49191-49193.