Galium trifidum

Template:Italic title Template:Taxobox 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).<ref name="marionkadushin">Kew World Checklist of Selected Plant Families</ref><ref>Biota of North America Program, Galium trifidum</ref><ref name="lillytruscott"/>

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.<ref>Cody, W. J. 1996. Flora of the Yukon Territory i–xvii, 1–669. NRC Research Press, Ottawa.</ref><ref>Voss, E. G. 1996. Michigan Flora, Part III: Dicots (Pyrolaceae-Compositae). Cranbrook Inst. of Science, Ann Arbor.</ref><ref>Moss, E. H. 1983. Flora of Alberta (ed. 2) i–xii, 1–687. University of Toronto Press, Toronto.</ref>

Subspecies

Five subspecies are currently recognized (May 2014):<ref name="marionkadushin"/>

• Galium trifidum subsp. brevipes (Fernald & Wiegand) Á.Löve & D.Löve - Canada and the northern United States (Dakotas to Maine)<ref name="lillytruscott">Biota of North America Program, Galium brevipes</ref>
• 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

External links

• Jepson Manual Treatment, Galium trifidum
• USDA Plants Profile, Galium trifidum
• Go Botany, New England Wildflower Society, Galium trifidum
• Wildflowers of the Pacific Northwest, Turner Photographics (Bellingham Washington State USA), Galium trifidum
• Botanik im Bild / Flora von Österreich, Liechtenstein und Südtirol, Dreizählig-Labkraut, Rubiaceae / Galium trifidumTemplate:Rubiaceae-stub