Packera ganderi
(T.M. Barkl. & Beauchamp) W.A. Weber & A. Love
Gander's Ragwort
G2ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.151444
Element CodePDAST8H1F0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusPackera
SynonymsSenecio ganderiT.M. Barkl. & Beauchamp
Other Common NamesGander's Groundsel (EN)
Concept ReferenceKartesz, 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 Date2016-06-14
Change Date1984-06-26
Edition Date2016-06-14
Edition AuthorsD. Gries (1997), rev. M. Fellows (2003), R. Bittman (2005), rev. Treher and Bittman (2016)
Threat ImpactHigh
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences6 - 20
Rank ReasonsEndemic to California, Packera ganderi (= Senecio ganderi) is known from thirteen extant occurrences in Riverside and San Diego Counties. Perhaps 4000 plants exist in the wild, although its potential may be greater since this is a partial fire follower. Threats include development, ORVs, and roads. Several occurrences are on public lands but the level of protection is not known. Populations on private lands are vulnerable to extirpation.
Range Extent CommentsEndemic to California in Riverside and San Diego counties.
Occurrences CommentsFourteen occurrences.
Threat Impact CommentsHabitat degradation and loss are the primary threat. Several occurrences occur on public land, however unprotected occurrences are likely to be developed. Threats include development, ORVs, erosion, trampling, agriculture, roads and trails, and trampling.
Ecology & Habitat
Habitat
On burned areas and occasionally on gabbroic outcrops within Chapparal communities. 400 - 1200 m.
Terrestrial HabitatsShrubland/chaparralBarrens
Other Nations (1)
United StatesN2
| Province | Rank | Native |
|---|
| California | S2 | Yes |
Roadless Areas (1)
California (1)
| Area | Forest | Acres |
|---|
| Pine Creek | Cleveland National Forest | 503 |
References (8)
- Beauchamp, R.M. 1986. A flora of San Diego County, California. Sweetwater River Press, California. 241 pp.
- CalFlora. 2005. Information on California plants for education, research and conservation. Berkeley, California: The CalFlora Database [web application]. Available: http://www.calflora.org/. (Accessed 2005)
- California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA. x + 388pp.
- Flora of North America Editorial Committee (FNA). 2006b. Flora of North America north of Mexico. Vol. 20. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford Univ. Press, New York. xxii + 666 pp.
- Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
- 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.
- 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.
- 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.