CPC Plant Profile: Valley Ringstem
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Plant Profile

Valley Ringstem (Anulocaulis annulatus)

Photo Credit: ©2016 John Doyen
  • Global Rank: G3 - Vulnerable
  • Legal Status: N/A
  • Family: Nyctaginaceae
  • State: CA
  • Nature Serve ID: 138507
  • Date Inducted in National Collection:

The valley ringstem is a perennial herb that hails from the four oclock family (April-May) and is endemic to the Death Valley region of the Mojave Desert. It prefers rocky canyon environments where it grows multiple erect stems that can be up to 2m tall. Along these stems are broad, thick, and bumpy leaves that are covered in stiff hairs. At the top of these stems, A. annulatus produces flared, light pink blooms that are also hairy. The blooms grow in clusters of 5-15 flowers with one long stamen growing out of each. Though currently labeled Imperiled because of its endemic status, A. annulatus almost never grows into a substantial population and is always found in solitary occurences. That said, its Imperiled status could also be attributed to its solitary growing patterns.

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  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 1 accessions of Anulocaulis annulatus in orthodox seed collection. There are as many as 200 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 08/05/2020
  • Seed Collection

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

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Taxon Anulocaulis annulatus
Authority (Coville) Standl.
Family Nyctaginaceae
CPC Number 8785
ITIS 19585
Common Names valley ringstem
Associated Scientific Names Anulocaulis annulatus | Boerhavia annulata
Distribution A. annulatus is endemic to the mountainous regions of Inyo County. 
State Rank
State State Rank
California SNR

A. annulatus can be found in rocky canyon environments throughout Inyo County. 

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID
Lead Institution State Reintroduction Type Year of First Outplanting

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