Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Global Range: Endemic to San Clemente Island, one of the Channel Islands off the coast of southern California.

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Physical Description

Type Information

Syntype for Stylophyllum virens Rose
Catalog Number: US 431356
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): B. Trask
Year Collected: 1903
Locality: Los Angeles, San Clemente Island, Santa Barbara Islands, California, United States, North America
  • Syntype: Rose, J. N. 1903. Bull. New York Bot. Gard. 3: 34.
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Syntype for Stylophyllum virens Rose
Catalog Number: US 431355
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): B. Trask
Year Collected: 1903
Locality: Los Angeles, San Clemente Island, Santa Barbara Islands, California, United States, North America
  • Syntype: Rose, J. N. 1903. Bull. New York Bot. Gard. 3: 34.
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© Smithsonian Institution, National Museum of Natural History, Department of Botany

Source: National Museum of Natural History Collections

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Syntype for Stylophyllum virens Rose
Catalog Number: US 469456
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): B. Trask
Year Collected: 1903
Locality: Los Angeles, San Clemente Island, Santa Barbara Islands, California, United States, North America
  • Syntype: Rose, J. N. 1903. Bull. New York Bot. Gard. 3: 34.
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Ecology

Habitat

Comments: Generally found on rocky substrates, in settings such as cliffs and coastal flats, within chaparral, coastal scrub, and coastal bluff scrub communities. < 500 m.

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 1 - 20

Comments: Seven occurrences have been mapped; two of these are considered historical.

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N1 - Critically Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: T1 - Critically Imperiled

Reasons: Endemic to San Clemente Island, one of the Channel Islands off the coast of southern California. The vegetation of San Clemente Island is recovering following the removal of non-native feral ungulates (goats, pigs, deer), completed in the mid-1980's. This taxon is now apparently relatively common within its small global range. Only five occurrences have been mapped and are believed extant, but this is likely an underestimate due to relatively recent (1995) taxonomic definition of this subspecies and, possibly, recent population expansion/re-establishment as the island's vegetation continues to recover.

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