Trillium angustipetalum

Trillium angustipetalum, with the common name is narrowpetal wakerobin, is a species of Trillium, plants which may be included within the Liliaceae (lily family) or the newer family Melanthiaceae.[1][2][3]

Trillium angustipetalum
Trillium angustipetalum blooming at Calaveras Big Trees State Park, California, USA
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Liliales
Family: Melanthiaceae
Genus: Trillium
Species:
T. angustipetalum
Binomial name
Trillium angustipetalum
(Torr.) J.D.Freeman [1]
Synonyms[2]

Distribution

The plant is native to northern and central California and southwestern Oregon, where it occurs in forests, woodlands, chaparral, and riparian zones.[1][4][5] It is found in the Klamath Mountains, western Sierra Nevada foothills, and Outer Southern California Coast Ranges.[1]

Description

Trillium angustipetalum is a rhizomatous perennial herb with one or more erect stems growing up to 70 centimetres (28 in) in height. There is a whorl of three large leaves generally described as bracts each measuring up to 25 centimetres (9.8 in) in length and round or somewhat oval. They are green and mottled with brownish or darker green spots.

Each stem produces one flower, which is held on top of the bracts. The ill-scented flower has three lance-shaped green or red sepals and three narrow purple or maroon petals measuring up to 11 centimetres (4.3 in) long.[6]

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References
  1. Calflora: Trillium angustipetalum
  2. Kew World Checklist of Selected Plant Families
  3. "Trillium angustipetalum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 15 December 2015.
  4. Biota of North America Program 2013 county distribution map
  5. Calflora taxon report, University of California, Trillium angustipetalum (Torrey) Freeman narrow petaled wakerobin, narrowpetal wakerobin
  6. Case Jr., Frederick W. (2002). "Trillium angustipetalum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 26. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.


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