Search / Plant Profile / Horkelia rydbergii

Plant Profile

Rydberg's Horkelia (Horkelia rydbergii)

Photo Credit: Keir Morse

Global Rank: G1 - Critically Imperiled
Legal Status: N/A
Family: Rosaceae
State: CA
Nature Serve ID: 837790
Lifeform: Forb/herb
Date Inducted in National Collection:

Description:

Horkelia rydbergii is a species of flowering plant in the rose family known by the common name Rydberg's horkelia.This is a perennial herb producing a low mat of hairy, hairy gray-green foliage around a woody base. The leaves are mostly flat and made up of pairs of hairy, wedge-shaped leaflets with toothed tips. The flower cluster is an open array of up to 8 to 40 flowers atop an erect stalk, each flower made up of five pointed green sepals and five white petals. At the center of the flower is a cone of 10 stamens around a bunch of up to 50 pistils. [Calscape]

Where is Rydberg's Horkelia (Horkelia rydbergii) located in the wild?

Habitat:

Horkelia rydbergii grows in dry to moist meadows and stream banks within pine forests at elevations of 1200--2800 m. [eFloras]

Distribution:

Horkelia rydbergii is endemic to the Transverse Ranges of Kern, Los Angeles, San Bernardino, and Ventura counties in California. [eFloras]

States & Provinces:

Rydberg's Horkelia can be found in California

Which CPC Partners conserve Rydberg's Horkelia (Horkelia rydbergii)?

Santa Barbara Botanic Garden

Not Sponsored

Conservation Actions

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, Santa Barbara Botanic Garden holds 1 accessions of Horkelia rydbergii in orthodox seed collection. There are as many as 1000 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 1 accessions of Horkelia rydbergii in orthodox seed collection. There are as many as 1863 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, Santa Barbara Botanic Garden has collected 1 seed accessions of Horkelia rydbergii from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 35 maternal plants

08/05/2020

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