Overview
Distribution
Localities documented in Tropicos sources
United States (North America)
Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
http://www.tropicos.org/Reference/1103
© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO 63110 USA
Source:
Missouri Botanical Garden
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National Distribution
Mexico
Origin: Native
Regularity: Regularly occurring
Currently: Present
Confidence: Confident
Type of Residency: Year-round
United States
Origin: Native
Regularity: Regularly occurring
Currently: Present
Confidence: Confident
Type of Residency: Year-round
© NatureServe
Source:
NatureServe
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Global Range: Los Angeles, Orange, Santa Barbara, San Diego, San Luis Obispo, and Ventura Counties and Santa Rosa Island, California, and northwestern Baja California, Mexico (Skinner, 1997; Wiggins, 1980).
© NatureServe
Source:
NatureServe
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Ecology
Habitat
Comments: Coastal bluff scrub, chaparral, coastal scrub, valley and foothill grassland; soils are rocky, often clay of serpentinite, Torrey sandstone (Skinner, 1997).
© NatureServe
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NatureServe
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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: 21 - 80
Comments: Known from about thirty-six total sites in California, only twenty-four of which are recently confirmed extant and from fewer than five occurrences in Baja California, Mexico (California Natural Diversity Database, May/1998 report).
© NatureServe
Source:
NatureServe
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Conservation
Conservation Status
National NatureServe Conservation Status
Mexico
Rounded National Status Rank: N1 - Critically Imperiled
United States
Rounded National Status Rank: N2 - Imperiled
© NatureServe
Source:
NatureServe
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NatureServe Conservation Status
Rounded Global Status Rank: G2 - Imperiled
Reasons: Dudleya blochmaniae is known from about twenty-four extant occurrences in California and fewer than five occurrences in Baja California, Mexico. The taxon is seriously threatened by development, urbanization, vehicles, foot traffic, exotic plant invasion, cattle tramping, grazing by feral herbivores, horticultural collecting, and fire break construction.
© NatureServe
Source:
NatureServe
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Trends
Global Short Term Trend: Decline of 50-70%
Comments: Sites disappearing rapidly due to urbanization and associated pressures (off-road vehicles, trampling, exotic plants, etc.).
© NatureServe
Source:
NatureServe
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Threats
Comments: Seriously threatened by development, urbanization, vehicles, foot traffic, cattle tramping, grazing by feral herbivores, exotic plants, horticultural collecting, and fire break construction (Bittman 1998).
© NatureServe
Source:
NatureServe
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Wikipedia
Dudleya blochmaniae
Dudleya blochmaniae is a succulent plant known by the common name Blochman's liveforever or Blochman's dudleya. This plant is native to California and Baja California, where it grows along the coastline.
Description
Dudleya blochmaniae grows somewhat erect, with cone-shaped, horn-shaped, or triangular succulent leaves along its stem. The plant may be brown, reddish-purple, or greenish. It bears a branching inflorescence with a few flowers per branch, each opening into a star-shaped bloom with five pointed white petals, sometimes with streaks of red.
Subspecies
Source:
Wikipedia
Unreviewed
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