Plagiobothrys figuratus ssp. corallicarpus
|coral seeded allocarya, coral-seeded allocarya, fragrant popcornflower|
|P.f. (Piper) I.M Johnst. ex M.E. Peck ssp c (Piper) Chambers|
|Edward Guerrant, Ph.D.|
The following Participating Institutions are custodians for this species in the CPC National Collection:
Rae Selling Berry Seed Bank & Plant Conservation Programs
The conservation of Plagiobothrys figuratus ssp. corallicarpus is fully sponsored.
Edward Guerrant, Ph.D. contributed to this Plant Profile.
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.
Distribution & Occurrence
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).
|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).|
Conservation, Ecology & Research
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).
Cattle grazing (Brock 1993).
Changes in local hydrology by re-channeling or removal of water from seasonal sprin
No formal research known.
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.
Determine germination requirements.
Determine propagation and reintroduction protocols.
Scoggan, H.J. 1978. The Flora of Canada. National Museums of CA, Publications in Botany.
Welsh, S.L. 1974. Anderson's Flora of Alaska and Adjacent Parts of Canada. 724p.