Pseudotrillium

brook wakerobin
Pseudotrillium rivale
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Liliales
Family: Melanthiaceae
Genus: Pseudotrillium
S.B. Farmer
Species: P. rivale
Binomial name
Pseudotrillium rivale
(S.Wats.) S. B. Farmer, 2002
Synonyms[1]

Trillium rivale S.Wats.

Pseudotrillium is a proposed monotypic genus of flowering plants containing the single species Pseudotrillium rivale, which is known by the common name brook wakerobin.[2] The genus was proposed in 2002 on the basis of morphology and molecular evidence that suggest the plant should no longer be included in genus Trillium.[3]

This species is endemic to the Siskiyou Mountains of southern Oregon (Josephine, Coos, Douglas, + Curry counties) and northern California (Siskiyou + Del Norte counties), usually on soils of ultramafic origin, such as serpentine.[1][4][5]

Pseudotrillium rivale is a rhizomatous perennial growing up to 20 centimeters in height. The three bracts have generally lance-shaped blades up to 11 centimeters long borne on petioles. The blades are glossy blue-green with silvery venations. Atop the whorl of bracts is a single nodding non-fragrant flower with green sepals and pink-blushed white petals up to 3 centimeters long by 2 wide.[6]

This plant has gained the Royal Horticultural Society's Award of Garden Merit.[7]

References

  1. 1 2 Kew World Checklist of Selected Plant Families
  2. ↑ "Trillium rivale". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 15 December 2015.
  3. ↑ Farmer, S. B. and E. E. Schilling. (2002). Phylogenetic analyses of Trilliaceae based on mophological and molecular data. Systematic Botany 27:4 674-92.
  4. ↑ Biota of North America Program 2013 county distribution map
  5. ↑ Calflora taxon report, University of California @ Berkeley, Pseudotrillium rivale (S. Watson) S. Farmer Siskiyou wakerobin
  6. ↑ Jepson Manual Treatment: Trillium rivale
  7. ↑ Royal Horticultural Society, Trillium rivale, brook wakerobin
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