Search / Plant Profile / Dudleya abramsii ssp. parva

Plant Profile

Conejo Dudleya (Dudleya abramsii ssp. parva)

Global Rank: G1 - Critically Imperiled
Legal Status: Federally Threatened
Family: Crassulaceae
State: CA
Nature Serve ID: 146554
Lifeform: Forb/herb
Categories of Interest: Cacti/Succulents
Date Inducted in National Collection: 02/10/1987

Description:

This species is threatened by a number of urban development activities, and is limited to only eleven sites in the wild. It was listed as Federally Endangered by the U.S. Fish and Wildlife Service in 1997. (USFWS 1997) This species occurs in a very unique habitat, and is unique even among other species in the Dudleya genus. This species has a flowering stalk that grows from 5 to 18 cm in length, tipped with pale yellow flowers that are often flecked with red on the keel. The fact that this species has yellow flowers distinguishes it from other local Dudleya species, which all have white flowers. These other local Dudleya species are evergreen, while the Conejo live-forever is vernal, with its rosette of linear leaves withering by early summer. (USFWS 1997, 1999, 2002)

Where is Conejo Dudleya (Dudleya abramsii ssp. parva) located in the wild?

Habitat:

This species is found on the rock outcrops and soils derived from Miocene Conejo volcanics in grassland and coastal sage scrub habitats. (USFWS 1997)

Distribution:

Western end of the Simi Hills along the Montclef Ridge to the Conejo Grade (approximately 16 km (10mi) in distance). (USFWS 1997)

States & Provinces:

Conejo Dudleya can be found in California

Which CPC Partners conserve Conejo Dudleya (Dudleya abramsii ssp. parva)?

California Botanic Garden

Not Sponsored

Conservation Actions

Assigned 06/09/17

University of California-Santa Cruz Arboretum & Botanic Garden

Not Sponsored

Assigned 01/17/19

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

09/01/2020

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 2 accessions of Dudleya parva in orthodox seed collection. There are as many as 15292 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

08/05/2020

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 2 seed accessions of Dudleya parva from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 125 maternal plants

Nature Serve Biotics

05/02/2017

Restricted to a specific volcanic substrate in the mountains forming the western boundary of the Los Angeles Basin, California. The total range is about 16 km long. There are 11 populations, most numbering in the hundreds of individuals. Threats include hiking and horseback riding, urban development, and fire suppression.

01/01/2010

Primary threats involve urban development, including construction of housing, golf courses and infrastructure. Other threats include trampling from hikers, off-road vehicles and equestrian use, as well as fire suppression activities and collection by pl

01/01/2010

There are eleven current sites along a ten mile stretch of Mountclef Ridge. Sites have from 25 to a few thousand individuals, with the majority containing numbers in the hundreds. (USFWS 1997)

01/01/2010

None known.

01/01/2010

Some of the land where this species is found on land that the Conejo Open Space Conservation Agency (COSCA) designates as ""open space"". The remaining populations are found on privately-owned property. Proportions of populations of this species on private property have been extirpated by development projects in the cities of Agoura Hills, Thousand Oaks, and Westlake Village. Population pressures for development on these private lands continues to increase. (USFWS 1997, 2002)

01/01/2010

Protect this plant in as many populations as possible.

01/01/2010

Maintain a genetically representative seed bank.