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Artemisia pattersonii
Gray
Family:
Asteraceae
FNA
Resources
Leila M. Shultz in Flora of North America (vol. 19, 20 and 21)
Perennials,
8-20 cm, mildly aromatic.
Stems
gray-brown, glabrate or finely pubescent.
Leaves
deciduous, gray-green; petiolate; blades (basal) broadly spatulate, 2-4 × 0.5 cm, pinnately lobed (lobes ca. 1.5 mm wide; cauline smaller, 1-pinnately lobed or entire), faces silky-hairy.
Heads
borne singly or (2-5, spreading to nodding, pedunculate) in paniculiform or racemiform arrays 1-5 × 0.5-1 cm.
Involucres
broadly hemispheric, 5-8 × 5-8(-10) mm.
Phyllaries
gray (margins dark brown to black), villous.
Florets:
pistillate 7-27; bisexual 32-100; corollas (yellow tinged with red), 2-3 mm (including exsert anthers), mostly glabrous (embedded in tangled receptacular hairs).
Cypselae
1.5-2 mm, glabrous.
2
n
= 14.
Flowering mid-late summer. Alpine meadows; 3500-4000 m; Colo., N.Mex., Wyo.
Artemisia pattersonii
can be distinguished from the closely related
A.
scopulorum
by its heads being borne singly and narrower phyllary margins.
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