Galium trifidum

Threepetal bedstraw
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Gentianales
Family:	Rubiaceae
Genus:	Galium
Species:	G. trifidum
Binomial name
	Galium trifidum; L.

Galium trifidum is a species of flowering plant in the coffee family, known by the common name threepetal bedstraw. It grows widespread in the arctic, temperate and subtropical regions of the Northern Hemisphere: northern and central Asia (Siberia, the Russian Far East, China, Japan, Kazakhstan), northern and eastern Europe (Scandinavia, France, Austria, Poland, Russia, Ukraine, Baltic states) and much of North America (from Greenland and the Aleutians as far south as Oaxaca and Hispaniola).^[1]^[2]^[3]

Galium trifidum is a usually perennial herb forming tangles of thin stems up to half a meter long, ringed with whorls of several linear to oval leaves. The inflorescence is a cluster of small white or pinkish flowers, each with usually three petal-like lobes in its corolla.^[4]^[5]^[6]

Subspecies

Five subspecies are currently recognized (May 2014):^[1]

Galium trifidum subsp. brevipes (Fernald & Wiegand) Á.Löve & D.Löve - Canada and the northern United States (Dakotas to Maine)^[3]
Galium trifidum subsp. columbianum (Rydb.) Hultén - Russian Far East (Kamchatka, Khabarovsk, Primorye, Sakhalin), Japan, Korea, China, Taiwan, Alaska, British Columbia, Washington State, Oregon, California, Nevada, Idaho, Montana
Galium trifidum subsp. halophilum (Fernald & Wiegand) Puff - Quebec, Newfoundland, Canadian Maritimes, Maine, Massachusetts
Galium trifidum subsp. subbiflorum (Wiegand) Puff - Alaska, Yukon, Northwest Territories, Alberta, British Columbia, high elevations in the western United States as far south as California and New Mexico
Galium trifidum subsp. trifidum - widespread throughout most of species range

References

^ ^a ^b Kew World Checklist of Selected Plant Families
^ Biota of North America Program, Galium trifidum
^ ^a ^b Biota of North America Program, Galium brevipes
^ Cody, W. J. 1996. Flora of the Yukon Territory i–xvii, 1–669. NRC Research Press, Ottawa.
^ Voss, E. G. 1996. Michigan Flora, Part III: Dicots (Pyrolaceae-Compositae). Cranbrook Inst. of Science, Ann Arbor.
^ Moss, E. H. 1983. Flora of Alberta (ed. 2) i–xii, 1–687. University of Toronto Press, Toronto.

External links

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[marionkadushin-1] Kew World Checklist of Selected Plant Families

[2] Biota of North America Program, Galium trifidum

[lillytruscott-3] Biota of North America Program, Galium brevipes

[4] Cody, W. J. 1996. Flora of the Yukon Territory i–xvii, 1–669. NRC Research Press, Ottawa.

[5] Voss, E. G. 1996. Michigan Flora, Part III: Dicots (Pyrolaceae-Compositae). Cranbrook Inst. of Science, Ann Arbor.

[6] Moss, E. H. 1983. Flora of Alberta (ed. 2) i–xii, 1–687. University of Toronto Press, Toronto.

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