CPC Plant Profile: Coral-seeded Allocarya
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Plant Profile

Coral-seeded Allocarya (Plagiobothrys figuratus ssp. corallicarpus)

Closeup of white, 5-petaled flowers in situ. Photo Credit: Richard Brock
Description
  • Global Rank: T1 - Critically Imperiled
  • Legal Status: N/A
  • Family: Boraginaceae
  • State: OR
  • Nature Serve ID: 140361
  • Date Inducted in National Collection: 02/09/1992

Plagiobothrys figuratus is a common and widespread plant found from Vancouver, British Columbia to southwestern Oregon. The more localized Plagiobothrys figuratus ssp. corallicarpus is found at only 18 sites within a small area in the Middle Rogue River Basin and the Jenny Creek watershed in southwest Oregon. It is often hard to tell closely related Plagiobothrys species apart, and one needs the mature nutlet (fruit) in order to differentiate them. This has made it very difficult to survey for P. figuratus ssp. corallicarpus as it is easily confused with more common species. Perhaps for this reason, this species was once thought extinct. It was first collected and described in the early 1920's, but no collections were made from 1946 until its rediscovery in 1991 (Brock 1993). Plagiobothrys figuratus ssp. corallicarpus is distinguished from nearby, related species by its large flowers (8-11mm wide), deeply ridged nutlets and a small attachment scars on the nutlets.

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Updates
  • 09/23/2020
  • Orthodox Seed Banking

Seeds from 3 locations stored at the Berry Botanic Garden.

Nature Serve Biotics
  • 05/02/2017

Low total number of plants in a very small area (33,000 to 62,000 plants in 0.5 sq. km.). Many of the occurrences are growing in areas experiencing high real estate development. Threats have a potentially high degree of impact.

Edward Guerrant, Ph.D.
  • 01/01/2010

Most sites (all but 2) are on private land and therefore would not be protected if this species were to be listed federally (ONHDB 2000). Cattle grazing (Brock 1993). Changes in local hydrology by re-channeling or removal of water from seasonal sprin

Edward Guerrant, Ph.D.
  • 01/01/2010

Approximately 18 sites. Populations range from as few as 11-50 individuals to as many as 1,000-10,000. One population is on Bureau of Land Management (BLM) land and one is on city land while the remainder are on private land (ONHDB 2000).

Edward Guerrant, Ph.D.
  • 01/01/2010

Extensive searches in 1993 over the entire range (Brock 1993). No formal research known.

Edward Guerrant, Ph.D.
  • 01/01/2010

Seeds from 3 locations stored at the Berry Botanic Garden.

Edward Guerrant, Ph.D.
  • 01/01/2010

Work with private property owners to conserve habitat. Reduce cattle grazing. Continue surveying private and public lands in order to determine the full extent of the species' range and accurate population numbers (Brock 1993). Determine longevity of seeds in soil seed bank.

Edward Guerrant, Ph.D.
  • 01/01/2010

Collect and store seeds from across the species' range. Determine germination requirements. Determine propagation and reintroduction protocols.

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Photos
Nomenclature
Taxon Plagiobothrys figuratus ssp. corallicarpus
Authority P.f. (Piper) I.M Johnst. ex M.E. Peck ssp c (Piper) Chambers
Family Boraginaceae
CPC Number 14006
ITIS 524530
USDA PLFIC
Common Names coral seeded allocarya | coral-seeded allocarya | fragrant popcornflower
Associated Scientific Names Plagiobothrys figuratus ssp. corallicarpus | Plagiobothrys figuratus var corallicarpus | Allocarya hirta ssp. corallicarpa | Plagiobothrys hirtus var. corallicarpus | Allocarya corallicarpa | Plagiobothrys scouleri var. corallicarpus
Distribution OR: Klamath Mountains, West Cascades & Crest near Grant's Pass in Josephine County and Medford in Jackson County.
State Rank
State State Rank
Oregon S1
Habitat

Vernal pool habitats in rocky, open areas in grassland meadows. The areas are wet in spring but very dry in summer (Knight and Seevers 1992).

Ecological Relationships

Plagiobothrys figuratus spp. corallicarpus grows in seasonal wetlands. The areas are usually inundated by water in the winter and spring and dry in the summer (Knight and Seevers 1992). Plants that grow here are specifically adapted to these highly variable habitat conditions.Plagiobothrys figuratus ssp. corallicarpus has white flowers that are much larger than those of other closely related Plagiobothrys species. Flowers emerge between June and July (Knight and Seevers 1992) after the seasonal wetlands dry up. Observations indicate that heavy grazing by cattle has a strong negative effect on Plagiobothrys figuratus ssp. corallicarpus. Parcels of land that receive continuous grazing appear to have no P. figuratus spp. corallicarpus plants on them while adjacent properties that have little or no grazing contain vigorous populations (Brock 1993). It appears that populations are able to rebound or re-colonize an area when grazing is removed if there is a soil seed bank or nearby seed source (Brock 1993).

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

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