Taxon Report

Astragalus pulsiferae Gray var. suksdorfii (Howell) Barneby

Suksdorf's milk-vetch

Print Report


©2013 Kirsten Bovee

  Classification
Scientific Name:
 Astragalus pulsiferae Gray var. suksdorfii (Howell) Barneby
Common Name:
 Suksdorf's milk-vetch
Family: Fabaceae
Element Code: PDFAB0F782
USDA Plants Symbol: ASPUS
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: May-Aug May-Aug
Elevation: 1300-2000 (4265-6560)
General Habitats: Great Basin scrub, Lower montane coniferous forest, Pinyon and juniper woodland
Microhabitat: Gravelly, Rocky, Volcanic
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G4T2
State Rank:
 S2
State List: None
Fed List: None
Other Status: BLM_S; SB_UCSC; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 25
Element Occurrence Ranks:
   Excellent (A) 8
   Good (B) 11
   Fair (C) 3
   Poor (D) 0
   None (X) 0
   Unknown (U) 3

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Lassen (LAS), Plumas (PLU), Shasta (SHA)
Quads: Name (Quad Code)
Almanor (4012122), Antelope Mtn. (4012058), Bogard Buttes (4012152), Chester (4012132), Manzanita Lake (4012155), Pine Creek Valley (4012151), Poison Lake (4012162), Stover Mtn. (4012133), Swains Hole (4012163), Thousand Lakes Valley (4012165)

Threat List Data from the CNDDB

Threat List Total: 10
EOs with Threat Listed: Total EOs % of EOs
20 80 %
Grazing 11 44%
Road/trail construction/maint. 11 44%
ORV activity 5 20%
Foot traffic/trampling 4 16%
Logging 4 16%
Other 3 12%
Wood cutting or brush clearing 3 12%
Development 1 4%
Mining 1 4%
Non-native plant impacts 1 4%

Notes
Threats:
Threatened by grazing, road widening, mining, competition, and timber harvest activities; potentially threatened by vehicles and development. State-listed as Endangered in WA.
Taxonomy:

Selected References

Erythea 1:111 (1893)
Memoirs of the New York Botanical Garden 13:968-971 (1964)
Rhodora 104(919):271-279 (2002)
Astragalus pulsiferae var. suksdorfii profile for potential Species of Conservation Concern evaluation (2017)
Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].