Search / Plant Profile / Holocarpha macradenia

Plant Profile

Santa Cruz Tarplant (Holocarpha macradenia)

Santa Cruz tarplant, Holocarpha macradenia. Photo Credit: Amy Patten

Global Rank: G1 - Critically Imperiled
Legal Status: Federally Threatened
Family: Asteraceae
State: CA
Nature Serve ID: 147015
Lifeform: Forb/herb
Date Inducted in National Collection: 04/11/1991

Description:

summer blooming annual

Where is Santa Cruz Tarplant (Holocarpha macradenia) located in the wild?

Habitat:

flat coastal grasslands

Distribution:

States & Provinces:

Santa Cruz Tarplant can be found in California

Which CPC Partners conserve Santa Cruz Tarplant (Holocarpha macradenia)?

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, University of California Botanical Garden holds 1 accessions of Holocarpha macradenia in orthodox seed collection. We are uncertain as to how many total seeds are in this collection.

09/01/2020

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 3 accessions of Holocarpha macradenia in orthodox seed collection. There are as many as 65461 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, University of California Botanical Garden has collected 1 seed accessions of Holocarpha macradenia from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass an unknown number of maternal plants

08/05/2020

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 2 seed accessions of Holocarpha macradenia from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass an unknown number of maternal plants

01/01/2010

development, historic and current habitat alteration and destruction caused by residential development, recreational development, airport expansion, and agriculture

01/01/2010

Currently known from a total of 18 populations; 12 of these are remaining native populations, and 6 are a result of experimental seedings. Six of the native populations occur around the city of Santa Cruz. The remaining six native populations occur around the city of Watsonville. The other six extant populations are a result of experimental seed transplants in Wildcat Regional Park in the east San Francisco Bay area