Allium madidum |
Allium columbianum |
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Columbia onion |
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Habit | Scapose perennial herbs from bulbs not usually clustered on a stout primary rhizome, the inner coats white to pink, the outer coats brownish to grayish, lacking reticulation and enclosing at least 1 bulb. | |
Leaves | Leaves typically persistent, green at time of flowering, sheathing basally with sheaths not extending far above soil surface; blade solid and flat, somewhat curved, 10-35 cm long and 5-8 mm wide, margins entire; scape persistent and solitary, cylindrical, 20-30 cm tall and 1.5-4 mm wide. |
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Inflorescence | Umbels of 25-50 flowers, hemispheric to globose; scape persistent and solitary, cylindrical, 20-30 cm tall and 1.5-4 mm wide; spathe bracts 3, ovate. |
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Flowers | Tepals 6, light or bright purple to purplish pink, lanceolate, acuminate, margins entire, becoming papery in fruit; stamens 6, equal to or longer than tepals with blue-grey anthers; ovary 3-chambered, stigma capitate. |
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Fruits | Capsule dehiscing lengthwise along back of carpal, containing 2 shiny black seeds. |
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Allium madidum |
Allium columbianum |
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Flowering time | May-July | |
Habitat | Seasonally wet soils on rock outcrops, wet meadows. | |
Distribution | Occurring east of the Cascades crest in far eastern Washington; Washington to Idaho and Montana.
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Origin | Native | |
Conservation status | Review Group 1 in Washington (WANHP) | |
Sibling taxa | ||
Web links |