Roadless Areas
Home/Species/ Wheeler's Skeletonweed

Chaetadelpha wheeleri

A. Gray ex S. Watson

Wheeler's Skeletonweed

G4Apparently Secure Found in 4 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.161766
Element CodePDAST21010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusChaetadelpha
Other Common Names
Wheeler's skeletonweed (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 Date2024-07-30
Change Date1994-04-18
Edition Date2024-07-30
Edition AuthorsN. Ventrella (2024)
Threat ImpactUnknown
Range Extent20,000-200,000 square km (about 8000-80,000 square miles)
Number of Occurrences81 - 300
Rank Reasons
Chaetadelpha wheeleri is a perennial herb occurring in creosote and sagebrush bush scrub on sandy soils, alkali flats, and sand dunes in western North America from Oregon and California east to Nevada in the United States. There are 86 estimated occurrences of this species, which are potentially threatened by development, rights-of-way maintenance, invasive species, and drought.
Range Extent Comments
Chaetadelpha wheeleri occurs in western North America from Oregon and California east to Nevada in the United States. Reports of the species occurring in Idaho are unverified (Jepson Flora Project 2024). Range extent was estimated to be over 180,000 square kilometers using herbarium specimens, NatureServe Network occurrence data, and photo-based observations documented between 1993 and 2024 (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Occurrences Comments
By 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 86 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact Comments
Although threats are not widely documented, Chaetadelpha wheeleri is potentially threatened by development, rights-of-way maintenance, invasive species, drought, and other threats in some places.
Ecology & Habitat

Habitat

Chaetadelpha wheeleri is found in "dunes, sandy soils and alkali flats in creosote bush scrub, [and] sagebrush scrub" (FNA 2006).
Terrestrial Habitats
DesertSand/dune
Other Nations (1)
United StatesN4
ProvinceRankNative
OregonS2Yes
NevadaS3Yes
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (4)
California (1)
AreaForestAcres
Boundary Peak (CA)Inyo National Forest210,884
Nevada (3)
AreaForestAcres
Boundary Peak (NV)Inyo National Forest21,851
Pine Grove NorthHumboldt-Toiyabe National Forest8,749
Pine Grove SouthHumboldt-Toiyabe National Forest88,945
References (8)
  1. Flora of North America Editorial Committee (FNA). 2006a. Flora of North America north of Mexico. Vol. 19. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York. xxiv + 579 pp.
  2. 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.
  3. Gottlieb, L.D. 2020. Flora of North America: <i>Chaetadelpha wheeleri.</i> Accessed: September 12, 2022. http://floranorthamerica.org/Chaetadelpha_wheeleri
  4. iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
  5. Jepson Flora Project (eds.) 2024. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2024).
  6. 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.
  7. NatureServe. 2024. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  8. Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).