三脉猪殃殃（学名：Galium kamtschaticum）为茜草科拉拉藤属下的一个种。

Galium kamtschaticum, known as Kamchatka bedstraw or boreal bedstraw, is a plant species in the Rubiaceae, named for the Kamchatka Peninsula on the Pacific Coast of Russia. The species is native to northeastern Asia and northern North America: Russia (Kamchatka, Sakhalin Island, and Kuril Islands), northeastern China (Heilongjiang, Jilin), Korea, Japan, Alaska (including the Aleutians), Canada (Yukon, Northwest Territories, British Columbia, Quebec, Ontario, Newfoundland, Nova Scotia, New Brunswick), and the northern part of the contiguous United States (Maine, New Hampshire, Vermont, New York, Michigan, Washington).