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Tanacetum potentilloides

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Botanical Description

Artemesia potentilloides). Stems tufted, erect, 10-25cm long, from a woody rootstock. Leaves mostly basal, long-stalked, the blade ovate in outline, bi or tripinnatisect, to 3cm long, the ultimate segments linear, silkytomentose. Flowerheads 5-10mm wide, yellow, in small irregular corymbs, summer. Oregon and California, in grassland and sagebrush at 1500-2250m. T.p. var. nitrophilum is smaller, 5-15cm tall, with pinnatifid leaves and flowerheads solitary or in twos to fours. Idaho and Nevada, in dry mountain habitats.