Roadless Areas
Home/Species/ King's Milkvetch

Astragalus calycosus

Torr. ex S. Wats.

King's Milkvetch

G5Secure Found in 81 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
Least concernIUCN
LowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.151288
Element CodePDFAB0F1N0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderFabales
FamilyFabaceae
GenusAstragalus
Other Common Names
Torrey's Milkvetch (EN) Torrey's milkvetch (EN)
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 Method Rank calculation - Biotics v2
Review Date2023-07-18
Change Date1988-08-31
Edition Date2023-07-18
Edition AuthorsNordman, C. (2023).
Threat ImpactLow
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences> 300
Rank Reasons
Astragalus calycosus occurs in the western United States, from the Great Basin and Range of California, eastern Oregon, and Nevada, through southern Idaho, Utah, southwestern Wyoming, southwestern Colorado, northwestern and central New Mexico, and Arizona. There are likely more than 300 occurrences, documented between 1992 and 2023, and threats impacts are likely low, including from recreational ORVs and invasive exotic plants.
Range Extent Comments
Astragalus calycosus occurs in the western United States, from the Great Basin and Range of California, eastern Oregon, and Nevada, through southern Idaho, Utah, southwestern Wyoming, southwestern Colorado, northwestern and central New Mexico, and Arizona. The range extent is estimated to be 850,000 square kilometers, using herbarium specimen and photo-based observation data collected between 1992 and 2023 (Barneby 1989, GBIF 2023, iNaturalist 2023).
Occurrences Comments
There are estimated to be more than 300 occurrences of Astragalus calycosus using herbarium specimen and photo-based observation data collected between 1992 and 2023 (GBIF 2023, iNaturalist 2023).
Threat Impact Comments
Threat impacts to Astragalus calycosus are likely to be from recreational ORVs and invasive exotic plants.
Ecology & Habitat

Habitat

This species is found in sunny, sandy locations like semi-deserts and mountains (Wildflower Center 2011), on rocky slopes to flats from 914-2438 m (3,000-8,000 feet) elevation (SEINet 2023).

Reproduction

Flowers April-May (SEINet 2023).
Terrestrial Habitats
Desert
Other Nations (1)
United StatesN5
ProvinceRankNative
OregonS1Yes
ArizonaSNRYes
ColoradoS3Yes
WyomingS2Yes
CaliforniaSNRYes
New MexicoS5Yes
UtahS4Yes
IdahoSNRYes
NevadaS5Yes
Threat Assessments
ThreatScopeSeverityTiming
6 - Human intrusions & disturbanceRestricted (11-30%)Moderate - slightHigh (continuing)
6.1 - Recreational activitiesRestricted (11-30%)Moderate - slightHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)Yes
Roadless Areas (81)
Arizona (6)
AreaForestAcres
Big RidgeKaibab National Forest9,087
Burro CanyonKaibab National Forest19,928
Cimarron HillsCoconino National Forest5,303
Coconino RimKaibab National Forest7,213
Grief HillPrescott National Forest12,535
Walker MountainCoconino National Forest6,382
California (13)
AreaForestAcres
Andrews Mtn.Inyo National Forest9,912
Benton RangeInyo National Forest9,637
Birch CreekInyo National Forest28,816
Black CanyonInyo National Forest32,421
Boundary Peak (CA)Inyo National Forest210,884
Chineese Camp (CA)Humboldt-Toiyabe National Forest4,339
Devil's Gate (CA)Humboldt-Toiyabe National Forest9,946
Excelsior (CA)Inyo National Forest45,607
PaiuteInyo National Forest58,712
Soldier CanyonInyo National Forest40,589
TinemahaInyo National Forest27,060
West Walker (CA)Humboldt-Toiyabe National Forest495
Wild Horse Mtn. (CA)Humboldt-Toiyabe National Forest28,822
Idaho (2)
AreaForestAcres
Italian PeakCaribou-Targhee National Forest141,158
Lemhi RangeSalmon-Challis National Forest308,533
Nevada (45)
AreaForestAcres
Alta T - East BHumboldt-Toiyabe National Forest21,732
Angel Peak NorthHumboldt-Toiyabe National Forest12,577
Angel Peak SouthHumboldt-Toiyabe National Forest6,540
Arc Dome - MahoganyHumboldt-Toiyabe National Forest4,208
Arc Dome - OphirHumboldt-Toiyabe National Forest5,652
Bald Mtn.Humboldt-Toiyabe National Forest41,598
Boundary Peak (NV)Inyo National Forest21,851
Bunker HillHumboldt-Toiyabe National Forest27,569
Cave CreekHumboldt-Toiyabe National Forest6,145
Charleston - CarpenterHumboldt-Toiyabe National Forest17,828
Charleston - Macks CynHumboldt-Toiyabe National Forest11,378
Charleston - McfarlandHumboldt-Toiyabe National Forest2,465
Currant - East SlopeHumboldt-Toiyabe National Forest10,101
Duck Creek Mtns.Humboldt-Toiyabe National Forest12,165
Excelsior Mtns.Humboldt-Toiyabe National Forest69,071
Georges CanyonHumboldt-Toiyabe National Forest108,551
Grant - BrunoHumboldt-Toiyabe National Forest4,828
Grant - Burnt CynHumboldt-Toiyabe National Forest126
Grant - Horse Spr.Humboldt-Toiyabe National Forest274
Grant - WiregrassHumboldt-Toiyabe National Forest8,541
Humboldt - Angel LkHumboldt-Toiyabe National Forest1,008
Humboldt - SouthHumboldt-Toiyabe National Forest11,152
Masket PeakHumboldt-Toiyabe National Forest8,778
Mt. EtnaHumboldt-Toiyabe National Forest20,527
Pearl PeakHumboldt-Toiyabe National Forest71,405
Pine Grove SouthHumboldt-Toiyabe National Forest88,945
PotosiHumboldt-Toiyabe National Forest5,145
QuinnHumboldt-Toiyabe National Forest62,459
Red MountainHumboldt-Toiyabe National Forest30,242
Ruby - Lamoille CynHumboldt-Toiyabe National Forest32,771
Ruby - MarshHumboldt-Toiyabe National Forest10,164
Snake - Big WashHumboldt-Toiyabe National Forest4,146
Snake - HatcheryHumboldt-Toiyabe National Forest4,627
Snake - Pole CkHumboldt-Toiyabe National Forest79
South SchellHumboldt-Toiyabe National Forest125,614
Spanish PeakHumboldt-Toiyabe National Forest31,520
SugarloafInyo National Forest11,534
Table Mtn. - EastHumboldt-Toiyabe National Forest87,789
The Cove 1Humboldt-Toiyabe National Forest2,847
Toiyabe RangeHumboldt-Toiyabe National Forest99,225
Ward MountainHumboldt-Toiyabe National Forest15,927
West Walker (NV)Humboldt-Toiyabe National Forest5,683
White Rock MtnHumboldt-Toiyabe National Forest24,917
WildcatHumboldt-Toiyabe National Forest28,565
WilhoitesHumboldt-Toiyabe National Forest11,297
Utah (15)
AreaForestAcres
418017Uinta National Forest19,631
418022Uinta National Forest17,289
Beehive PeakFishlake National Forest59,137
Casto BluffDixie National Forest87,466
Cedar KnollManti-Lasal National Forest22,502
Cove MountainDixie National Forest16,632
Dairy ForkManti-Lasal National Forest30,222
Flat CanyonFishlake National Forest8,663
North PavantFishlake National Forest53,262
Oak CreekFishlake National Forest54,053
PavantFishlake National Forest42,560
Raft RiverSawtooth National Forest23,969
Red Canyon NorthDixie National Forest9,973
Stoddard MountainDixie National Forest13,165
Wayne WonderlandFishlake National Forest12,395
References (7)
  1. Barneby, R.C. 1989. Fabales. In A. Cronquist, A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren (eds.). Intermountain flora: Vascular plants of the Intermountain West, U.S.A. Vol. 3, Part B. New York Botanical Garden, Bronx. 279 pp.
  2. Flora of North America Editorial Committee (FNA). 2023. Flora of North America north of Mexico. Vol. 11. Magnoliophyta: Fabaceae, parts 1+2. Oxford Univ. Press, New York. xxvii + 1108 pp.
  3. Global Biodiversity Information Facility (GBIF). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2023).
  4. iNaturalist. 2023. Online. Available: https://www.inaturalist.org (accessed 2023).
  5. 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.
  6. Southwest Environmental Information Network (SEINet). 2023. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2023).
  7. Wildflower Center. 2011. Native Plant Database: <i>Astragalus calycosus</i>. Lady Bird Johnson Wildflower Center, University of Texas, Austin. Accessed: September 1, 2022. https://www.wildflower.org/plants/result.php?id_plant=ASCA9