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Plant Profile

Calistoga Popcorn-flower (Plagiobothrys strictus)

Global Rank: G1 - Critically Imperiled
Legal Status: Federally Endangered
Family: Boraginaceae
State: CA
Nature Serve ID: 144163
Lifeform: Forb/herb
Date Inducted in National Collection: 03/06/1993

Description:

annual herb

Where is Calistoga Popcorn-flower (Plagiobothrys strictus) located in the wild?

Habitat:

pools and swales adjacent to and fed by hot springs and small geysers in grasslands

Distribution:

States & Provinces:

Calistoga Popcorn-flower can be found in California

Which CPC Partners conserve Calistoga Popcorn-flower (Plagiobothrys strictus)?

University of California Botanical 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

09/01/2020

Based on an September 2020 extract of the California Plant Rescue Database, University of California Botanical Garden holds 1 accessions of Plagiobothrys strictus in orthodox seed collection. There are as many as 1463 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 Plagiobothrys strictus from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 10 maternal plants

Nature Serve Biotics

05/02/2017

Narrowly endemic to hot spring-influenced habitats in Napa County, California. 2 of the 3 known occurrences are extant; 1 is scattered over about 4 ha near a small, undeveloped hot spring; the other is located at an airport. The latter population is threatend by further development, airport maintenance, vehicle parking, and grass mowing. A convalescent community has been proposed for the undeveloped site, but zoning restrictions have so far prevented this. Most (about 70%) of the species' original habitat in the county has been destroyed by development and conversion to viticulture.

01/01/2010

construction of the airport and further development could threaten the population at Calistoga Airport the population near Myrtledale Hot Springs has been bisected by an asphalt road, and the landowner has proposed to build a convalescent community

01/01/2010

two populations; one site occurs at the Calistoga Airport and another population is scattered over an area of private land near Myrtledale Hot Springs