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Antennaria howellii

Greene

Small Pussytoes

G5Secure Found in 26 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.128375
Element CodePDAST0H1D0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusAntennaria
Other Common Names
Antennaire de Howell (FR) Howell's pussytoes (EN) Howell's Pussytoes (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.
Taxonomic Comments
Antennaria howellii, as treated by Kartesz (1994), includes ssp. neodioica and various other subspecies sometimes treated as A. neodioica (with various subspecies including ssp. howellii).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-05-01
Change Date2000-10-22
Edition Date2024-05-01
Edition AuthorsAnnable, C. (1993), rev. L. Morse (2000), rev. Soteropoulos (2024)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank Reasons
Antennaria howellii is a wide-ranging perennial herb occurring throughout North America, including Newfoundland and Labrador west to Yukon in Canada and south to North Carolina west to California in the United States. There are four subspecies with similar ecological preferences and extensive overlap in their ranges. Little is known about threats or trends, but with a large range extent and number of occurrences, abundant habitat, broad habitat preferences, and no obvious intrinsic vulnerabilities, this species is considered secure.
Range Extent Comments
Antennaria howellii occurs throughout North America, including Newfoundland and Labrador west to Yukon in Canada, and south to North Carolina west to California in the United States. The "Antennaria howellii (previously A. neodioica) polyploid complex is highly variable morphologically; four more or less distinct subspecies can be recognized within it" (FNA 2006). See individual subspecies entries for their respective ranges.
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 over 1,500 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact Comments
Although threats are not widely documented, Antennaria howellii is potentially threatened by development, recreational activities, invasive species, and other threats in some places. However, their overall impact is likely negligible given the species' broad range, large number of occurrences, and no obvious intrinsic vulnerabilities.
Ecology & Habitat

Habitat

Antennaria howellii grows in pastures, dry fields, openings in woodlands and forests, rock barrens, and dry lake shores (FNA 2006).
Terrestrial Habitats
Forest/WoodlandGrassland/herbaceousOld fieldBarrensBare rock/talus/scree
Other Nations (2)
CanadaN5
ProvinceRankNative
Yukon TerritoryS2Yes
Nova ScotiaS4Yes
AlbertaS4Yes
New BrunswickS5Yes
QuebecSNRYes
OntarioS5Yes
SaskatchewanS4Yes
British ColumbiaS5Yes
Island of NewfoundlandS3Yes
NunavutSHYes
Prince Edward IslandS4Yes
ManitobaS3Yes
United StatesN5
ProvinceRankNative
IowaSNRYes
South DakotaSNRYes
MaineSNRYes
IndianaS5Yes
DelawareSNRYes
CaliforniaSNRYes
WyomingS3Yes
VermontS5Yes
TennesseeS1Yes
IllinoisSNRYes
New YorkSNRYes
ColoradoSNRYes
Rhode IslandSNRYes
NebraskaSNRYes
MontanaS5Yes
North CarolinaSNRYes
WashingtonSNRYes
ConnecticutSNRYes
OregonSNRYes
New JerseySNRYes
KansasSNRYes
MinnesotaSNRYes
IdahoSNRYes
OhioSNRYes
New HampshireSNRYes
North DakotaSNRYes
PennsylvaniaS5Yes
MassachusettsSNRYes
MarylandSNRYes
District of ColumbiaSNRYes
MichiganSNRYes
VirginiaSNRYes
West VirginiaS2Yes
KentuckySNRYes
WisconsinSNRYes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (26)
Idaho (3)
AreaForestAcres
Bighorn - WeitasNez Perce-Clearwater National Forest254,845
North Lochsa SlopeNez Perce-Clearwater National Forest117,662
West Meadow CreekNez Perce-Clearwater National Forest115,949
Maine (1)
AreaForestAcres
Caribou - Speckled ExtWhite Mountain National Forest5,988
Montana (10)
AreaForestAcres
Bear - Marshall - Scapegoat - SwanLolo National Forest118,485
Bear - Marshall - Scapegoat - SwanLewis and Clark National Forest344,022
Big Snowy Mountains WsaLewis and Clark National Forest88,003
Bmss Ra 1485Flathead National Forest334,275
HoodooLolo National Forest105,162
Lolo CreekLolo National Forest14,335
Patricks Knob - North CutoffLolo National Forest16,970
Reservation DivideLolo National Forest16,908
Scotchman Peaks (MT)Kootenai National Forest53,909
South Siegel - South CutoffLolo National Forest13,474
North Dakota (2)
AreaForestAcres
Bullion ButteDakota Prairie Grasslands19,877
Kinley PlateauDakota Prairie Grasslands16,900
Oregon (2)
AreaForestAcres
North PaulinaDeschutes National Forest19,670
South PaulinaDeschutes National Forest9,074
Virginia (2)
AreaForestAcres
Gum RunGeorge Washington National Forest12,620
SkidmoreGeorge Washington National Forest5,641
Washington (4)
AreaForestAcres
BackboneGifford Pinchot National Forest1,201
BangsColville National Forest3,746
Grassy TopIdaho Panhandle National Forests13,485
Jefferson RidgeOlympic National Forest6,512
West Virginia (1)
AreaForestAcres
Dry River (WV)George Washington National Forest7,331
Wyoming (1)
AreaForestAcres
Laramie PeakMedicine Bow-Routt National Forest28,608
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. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
  3. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  4. iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
  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. Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
  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).