Search / Plant Profile / Horkelia hendersonii

Plant Profile

Henderson's Horkelia (Horkelia hendersonii)

Photo Credit: Kris Freitag

Global Rank: G1 - Critically Imperiled
Legal Status: N/A
Family: Rosaceae
State: CA, OR
Nature Serve ID: 159335
Lifeform: Forb/herb
Date Inducted in National Collection:

Description:

Where is Henderson's Horkelia (Horkelia hendersonii) located in the wild?

States & Provinces:

Henderson's Horkelia can be found in California, Oregon

Which CPC Partners conserve Henderson's Horkelia (Horkelia hendersonii)?

Rae Selling Berry Seed Bank & Plant Conservation Program

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

Kris Freitag

12/29/2021

As part of CPC's IMLS funded initiative to determine seed storage longevity in wild rare plant species, “fresh” seed of Henderson’s horkelia (Horkelia hendersonii) was collected in the Rogue River–Siskiyou National Forest. In Oregon, it is found only at four sites in Jackson County. Thousands of the plants grow in this high-elevation, open area of low grasses and forbs; apparently, population numbers have not much changed since the “original” seed collection was made over 30 years ago. When time came to collect seed, it took a while to visually determine which of the fruits contained mature seed, which are dark, mottled and shiny as if varnished. Upon processing of the seed, it became apparent that many mature-looking seeds had no contents, which complicated selection of sufficient good seed for the project.

Center for Plant Conservation

08/18/2021

In 2021, CPC contracted the Rae Selling Berry Seed Bank 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, California Botanic Garden holds 1 accessions of Horkelia hendersonii 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, Rae Selling Berry Seed Bank & Plant Conservation Program holds 1 accessions of Horkelia hendersonii in orthodox seed collection. There are as many as 110 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, Rae Selling Berry Seed Bank & Plant Conservation Program has collected 1 seed accessions of Horkelia hendersonii 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 Native Plant Society has collected 1 seed accessions of Horkelia hendersonii from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass an unknown number of maternal plants