Search / Plant Profile / Deinandra minthornii

Plant Profile

Santa Susana Tarweed (Deinandra minthornii)

Global Rank: G2 - Imperiled
Legal Status: N/A
Family: Asteraceae
State: CA
Nature Serve ID: 138357
Lifeform: Shrub
Date Inducted in National Collection: 03/08/1989

Description:

Hemizonia minthornii, or Santa Susana tarplant, is a perennial subshrub in the aster family that produces yellow flowers from July to November. It grows in crevices of sandstone bluffs and outcrops in the chaparral in the Santa Susana and Santa Monica mountains of Los Angeles and Ventura counties.

Where is Santa Susana Tarweed (Deinandra minthornii) located in the wild?

Habitat:

Hemizonia minthornii is restricted to sandstone bluffs and outcrops in the chaparral.

Distribution:

Historically, Hemizonia minthornii was found in the Santa Susana and Santa Monica mountains of Los Angeles and Ventura counties.

States & Provinces:

Santa Susana Tarweed can be found in California

Which CPC Partners conserve Santa Susana Tarweed (Deinandra minthornii)?

California Botanic Garden

Not Sponsored

Conservation Actions

Assigned 06/09/17

San Diego Zoo Wildlife Alliance

Not Sponsored

Assigned 06/13/17

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 7 accessions of Deinandra minthornii in orthodox seed collection. There are as many as 15763 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 4 seed accessions of Deinandra minthornii from 4 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 102 maternal plants

Nature Serve Biotics

05/02/2017

Endemic to California, Hemizonia minthornii occurs in Los Angeles and Ventura Counties. Threats include development.

01/01/2010

Threats include residential development, new roads and road maintenance.

01/01/2010

There were over 20 known occurrences of Santa Susana tarplant, but one-fourth of these have not been seen in many years and their current status is unknown.

01/01/2010

Remaining habitat is spread among several private landowners and the Los Angeles Department of Water and Powers, therefore little of this plant's habitat is protected.

01/01/2010

A habitat conservation plan is needed and research on its reproductive biology, germination and growth and habitat requirements will be necessary in formulating a conservation strategy.