CPC Plant Profile: San Jacinto Valley Crownscale
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Plant Profile

San Jacinto Valley Crownscale (Atriplex coronata var. notatior)

  • Global Rank: T1 - Critically Imperiled
  • Legal Status: Federally Endangered
  • Family: Amaranthaceae
  • State: CA
  • Nature Serve ID: 154962
  • Date Inducted in National Collection: 10/17/2021

Atriplex coronata var. notatior is a variation of the Crownscale that can be found in various wetlands and grasslands across San Jacinto Valley, CA. A. c. var. notatior is a dynamic species that flourishes after the rainy season when there is local, large-scale flooding. This annual herb also utilizes these flooded conditions to distribute its seed by ferrying its fruit (which are buoyant) across the flooded waterways. Whether in or out of the rainy season, the seeds can stay viable for up to five years. Across California however, wetland habitats are being fragmented by ongoing urbanization and agriculture.

Participating Institutions
  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 7 accessions of Atriplex coronata var. notatior in orthodox seed collection. There are as many as 37491 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

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Taxon Atriplex coronata var. notatior
Authority Jepson
Family Amaranthaceae
CPC Number 10682
ITIS 192235
Common Names San Jacinto Valley Crownscale | Crownscale
Associated Scientific Names Atriplex coronata var. notatior | Atriplex coronata
Distribution In the state of California, A. c. var. notatior is endemic to San Jacinto Valley in Riverside County. It is here where occurrences take place starting from Mystic Lake and continues southwest across the valley.
State Rank
State State Rank
California S1

The San Jacinto Valley Crownscale is a seasonal wetland herb that depends on a dynamic hydrological area to reproduce and distribute their fruit. This dynamic distribution can occur through different types of wetlands including alkali sinks, freshwater wetlands, vernal pools, and seasonally flooded grasslands.

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID

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