Search / Plant Profile / Deinandra increscens ssp. villosa

Plant Profile

Gaviota Tarplant (Deinandra increscens ssp. villosa)

Beetles covered in pollen while visiting disk flowers on Gaviota tarplant. Photo Credit: Heather Schneider

Global Rank: T2 - Imperiled
Legal Status: Federally Endangered
Family: Asteraceae
State: CA
Nature Serve ID: 129221
Lifeform: Forb/herb
Date Inducted in National Collection: 09/01/2001

Description:

Deinandra increscens ssp. villosa is an annual herb that is native to California and is endemic (limited) to California. The plant can range in size from 6 to 45 cm with yellow flowers that bloom from April though October in tight groups or in pairs. [Jepson]

Where is Gaviota Tarplant (Deinandra increscens ssp. villosa) located in the wild?

Habitat:

Deinandra increscens ssp. villosais found in needlegrass grasslands dominated by Avena spp. (a nonnative wild oat), and occasional native purple needlegrass. Its habitat lies on an uplifted, narrow marine terracte 150 to 200 ft. above sea level Positas soils, which consist of acidic, fine, sandy loams.

Distribution:

Approximately 49 specimens of Deinandra increscens ssp. villosa can be found in western Santa Barbara County. [CNPS]

States & Provinces:

Gaviota Tarplant can be found in California

Which CPC Partners conserve Gaviota Tarplant (Deinandra increscens ssp. villosa)?

Santa Barbara Botanic Garden

Not Sponsored

Conservation Actions

Assigned 06/09/17

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

Heather Schneider

10/26/2021

The Santa Barbara Botanic Garden made conservation seed collections from multiple Gaviota tarplant (Deinandra increscens ssp. villosa) populations this year along the Santa Barbara County coast. One collection, made on the former Bixby Ranch, which is now The Nature Conservancy's Jack and Laura Dangermond Preserve. In addition to conservation seed collections, we also revisited a site from which seeds were collected in 2003 to recollect for the CPC/USDA RNA integrity project. Although we could not locate plants at the exact location where they were previously collected, we were able to collect from a nearby patch that was less than 0.1 miles away. The Santa Barbara Botanic Garden is involved in several projects related to Gaviota tarplant, including pollinator studies, genetics research and conservation seed banking. We are currently investigating germination biology and growing it in our nursery.

Center for Plant Conservation

08/18/2021

In 2021, CPC contracted the Santa Barbara Botanic Garden to recollect seed from a population currently held in long term orthodox seed storage as part of an IMLS-funded seed longevity experiment. The National Laboratory for Genetic Resources Preservation will evaluate how germination tested viability and RNA Integrity of seed lots decline over time in storage.

09/01/2020

Based on an September 2020 extract of the California Plant Rescue Database, Santa Barbara Botanic Garden holds 9 accessions of Deinandra increscens subsp. villosa in orthodox seed collection. There are as many as 4300 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

09/01/2020

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 3 accessions of Deinandra increscens subsp. villosa in orthodox seed collection. We are uncertain as to how many total seeds are in this collection.

08/05/2020

Based on an August 2020 extract of the California Plant Rescue Database, Santa Barbara Botanic Garden has collected 9 seed accessions of Deinandra increscens subsp. villosa from 8 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 215 maternal plants

08/05/2020

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 3 seed accessions of Deinandra increscens subsp. villosa from 3 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 150 maternal plants

Nature Serve Biotics

05/02/2017

Narrowly endemic to a 3.6 km-long strip of coastal terrace west of Santa Barbara, California. There are 4 extant occurrences, possibly representing a single extended population. Approximately 40 percent of the coastal terrace habitat within the taxon's range had been destroyed by oil and gas facilities and pipelines by 1995; the remaining habitat is seriously threatened by pending development.

01/01/2010

there are no protected sites destruction of individual plants, habitat loss, and degradation from the development of oil and gas facilities, including pipelines, and competition with nonnative weeds. Potential road development.

01/01/2010

1 population extended along 2 miles stretch of coastal terrace 15 subpopulations. Dieter Wilken recorded three populations.