Trillium angustipetalum

Trillium angustipetalum
	Calaveras Big Trees State Park in Calaveras and Tuolumne counties, California
Conservation status
	; Apparently Secure (NatureServe)
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
Synonyms
	T. angustipetalum Trillium chloropetalum var. angustipetalum (Torr.) Munz ; Trillium giganteum var. angustipetalum (Torr.) R.R.Gates ; Trillium sessile var. angustipetalum Torr. ; ;

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.^[2]^[3]^[4]

Description[edit]

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.^[5]

Taxonomy[edit]

In 1856, John Torrey described Trillium sessile var. angustipetalum based on a specimen collected by John Milton Bigelow two years earlier in California.^[6]^[7] In 1975, John Daniel Freeman described the species Trillium angustipetalum based on Torrey's variety.^[8]^[9] The epithet angustipetalum means "narrow-petaled".

Distribution[edit]

The plant is native to northern and central California and southwestern Oregon, where it occurs in forests, woodlands, chaparral, and riparian zones. It is found in the Klamath Mountains, western Sierra Nevada foothills, and Outer Southern California Coast Ranges.^[3]^[10]

Bibliography[edit]

Case, Frederick W.; Case, Roberta B. (1997). Trilliums. Portland, Oregon: Timber Press. pp. 204–208. ISBN 978-0-88192-374-2.
Freeman, J. D. (1975). "Revision of Trillium subgenus Phyllantherum (Liliaceae)". Brittonia. 27 (1): 1–62. doi:10.2307/2805646. JSTOR 2805646. S2CID 20824379.

References[edit]

^ "Trillium angustipetalum". NatureServe Explorer. NatureServe. Retrieved 12 March 2022.
^ ^a ^b "Trillium angustipetalum (Torr.) J.D.Freeman". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 12 March 2022.
^ ^a ^b "Trillium angustipetalum". Calflora. Berkeley, California: The Calflora Database. Retrieved 12 March 2022.
^ USDA, NRCS (n.d.). "Trillium angustipetalum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 12 March 2022.
^ Case Jr., Frederick W. (2002). "Trillium angustipetalum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 26. New York and Oxford: Oxford University Press. Retrieved 12 March 2022 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
^ "Trillium sessile var. angustipetalum Torr.". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens. Retrieved 12 March 2022.
^ Torrey, John (1856), Report on the botany of the expedition (Part V), Description of the general botanical collections (No. 4), Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean, vol. IV: Route near the thirty-fifth parallel, explored by lieutenant A. W. Whipple, topographical engineers, in 1853 and 1854, Washington, D.C.: Department of War, p. 151, doi:10.5962/bhl.title.41563, OCLC 12125612, retrieved 12 March 2022
^ "Trillium angustipetalum (Torr.) J.D.Freeman". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens. Retrieved 12 March 2022.
^ Freeman (1975), pp. 55–56.
^ "Trillium angustipetalum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 12 March 2022.

External links[edit]

Jepson Manual eFlora (TJM2) treatment of Trillium angustipetalum
Biodiversity Information Serving Our Nation (BISON): occurrence data + maps for Trillium angustipetalum
Trillium angustipetalum in the CalPhotos photo database, University of California, Berkeley
Citizen science observations for Trillium angustipetalum at iNaturalist
"Trillium angustipetalum". NatureServe Explorer. NatureServe, Arlington, Virginia. Retrieved 16 November 2021.

This Liliales article is a stub. You can help Wikipedia by expanding it.

[NatureServe-1] "Trillium angustipetalum". NatureServe Explorer. NatureServe. Retrieved 12 March 2022.

[POWO:258289-2-2] "Trillium angustipetalum (Torr.) J.D.Freeman". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 12 March 2022.

[Calflora-3] "Trillium angustipetalum". Calflora. Berkeley, California: The Calflora Database. Retrieved 12 March 2022.

[USDA:TRAN5-4] USDA, NRCS (n.d.). "Trillium angustipetalum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 12 March 2022.

[FNA:242101984-5] Case Jr., Frederick W. (2002). "Trillium angustipetalum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 26. New York and Oxford: Oxford University Press. Retrieved 12 March 2022 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

[IPNI:258377-2-6] "Trillium sessile var. angustipetalum Torr.". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens. Retrieved 12 March 2022.

[Torrey_1856-7] Torrey, John (1856), Report on the botany of the expedition (Part V), Description of the general botanical collections (No. 4), Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean, vol. IV: Route near the thirty-fifth parallel, explored by lieutenant A. W. Whipple, topographical engineers, in 1853 and 1854, Washington, D.C.: Department of War, p. 151, doi:10.5962/bhl.title.41563, OCLC 12125612, retrieved 12 March 2022

[IPNI:258289-2-8] "Trillium angustipetalum (Torr.) J.D.Freeman". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens. Retrieved 12 March 2022.

[FOOTNOTEFreeman197555–56-9] Freeman (1975), pp. 55–56.

[BONAP-10] "Trillium angustipetalum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 12 March 2022.

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