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Bransford, W.D. and Dolphia
Delphinium trolliifolium A. Gray
Columbian larkspur, Cow Poison
USDA Symbol: DETR2
USDA Native Status: L48 (N)
A stately plant with stout, hollow, leafy, generally tall stems and bilaterally symmetrical, deep purplish-blue flowers in long loose racemes; upper stems and flower stalks commonly covered with minute, yellowish hairs.
This handsome native species is common in wet parts of the Northwest. Members of the genus Delphinium are known as both delphinium and larkspur. Gardeners generally call the tall, perennial species delphinium and the smaller, annual species larkspur. Botanists usually call all species delphinium. Cattle ranchers, who despise the plants because of their toxicity to livestock, call all species larkspur.
Bloom InformationBloom Time: Apr , May , Jun
, OR Native Distribution:
Southern Washington south to northern California. Native Habitat:
Moist shady woods and wet banks.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Native Seed Network
- Corvallis, OR
Record Last Modified: 2007-01-01
Research By: TWC Staff