Home/Species/ San Bernardino Aster

Symphyotrichum defoliatum

(Parish) Nesom

San Bernardino Aster

G2Imperiled Found in 1 roadless area NatureServe Explorer →

G2ImperiledGlobal Rank

High - mediumThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.150751

Element CodePDASTE80C0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderAsterales

FamilyAsteraceae

GenusSymphyotrichum

Synonyms

Aster defoliatusParish

Concept Reference

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.

Conservation Status

Rank MethodLegacy Rank calculation - Excel v3.1x

Review Date2015-07-14

Change Date2010-11-22

Edition Date2005-02-07

Edition AuthorsOliver, L., rev. G. Davis (2012)

Threat ImpactHigh - medium

Range Extent5000-20,000 square km (about 2000-8000 square miles)

Number of Occurrences6 - 80

Rank Reasons

Symphyotrichum defoliatum is endemic to southern California, and formerly called Aster bernardinus. This species has been seldomly reported in recent years. While this species usually occurs in meadows, springs and streams, it also occurs in upland habitats. Many of the occurrences in Los Angeles and Orange County have been extirpated. Most of the occurrences in Riverside, San Diego and Orange Counties are on private lands and are threatened. It should be noted that there are some occurrences in these counties that are on Forest Service lands (Ward and Bittman 2004).

Occurrences Comments

76 total occurrences, 25 of which have been recently observed. At least 26 are extirpated as of 2010.

Ecology & Habitat

Habitat

Grassland, disturbed places; Elevation: <2050 m (Jepson FloraProject 2017).

Terrestrial Habitats

Grassland/herbaceous

Other Nations (1)

United StatesN2

Province	Rank	Native
California	S2	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (1)

California (1)

Area	Forest	Acres
Barker Valley	Cleveland National Forest	11,940

References (4)

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.
Jepson Flora Project (eds.) 2015. Jepson Online Interchange for California Floristics. Accessed online: http://ucjeps.berkeley.edu/interchange/
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.
Ward, M. and R. Bittman. 2004. Rare Plant Status Review: <i>Symphyotrichum defolitatum.</i> California Native Plant Society and California Natural Diversity Database.