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purple wormwood
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Patterson sagewort, Patterson's wormwood
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| Perennials, (3–)5–16(–30) cm (cespitose), faintly aromatic (not rhizomatous, taproots stout, caudices simple or branched, proximal branches clothed with persistent leaf bases). |
Perennials, 8–20 cm, mildly aromatic. |
1–5, erect, whitish gray, densely tomentose. |
gray-brown, glabrate or finely pubescent. |
mostly basal (cauline 1–4), greenish to whitish green; blades (basal) 1–4.5 × 0.6–1.5 cm, 1–2-ternately to palmately lobed (flowering-stem blades 3-lobed), faces sparsely hairy. |
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. |
campanulate or hemispheric, 3.5–6 × 6–11 mm. |
broadly hemispheric, 5–8 × 5–8(–10) mm. |
pistillate 9–10; bisexual 20–30; corollas yellow or reddish black, 2–3 mm, sometimes glandular. |
pistillate 7–27; bisexual 32–100; corollas (yellow tinged with red), 2–3 mm (including exsert anthers), mostly glabrous (embedded in tangled receptacular hairs). |
lanceolate (margins brown), pilose. |
gray (margins dark brown to black), villous. |
(2–20, peduncles 0 or to 25 mm) in subcapitate to capitate arrays 2–3 × 2–3 cm. |
borne singly or (2–5, spreading to nodding, pedunculate) in paniculiform or racemiform arrays 1–5 × 0.5–1 cm. |
oblong, 1.5–2.5 mm, (apices flattened) glabrous. |
1.5–2 mm, glabrous. |
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= 14. |
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Flowering mid–late summer. |
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Alpine meadows |
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3500–4000 m (11500–13100 ft) |
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AK; YT; Asia |
CO; NM; WY |
Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia pattersonii can be distinguished from the closely related A. scopulorum by its heads being borne singly and narrower phyllary margins. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
1. Corollas reddish black; cypselae ca. 2.5 mm, margins with relatively narrow ribs | subsp. globularia |
1. Corollas yellow; cypselae 1.5–2 mm, margins with relatively broad ribs | subsp. lutea |
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| FNA vol. 19, p. 525. |
FNA vol. 19, p. 520. |
| Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia |
Asteraceae > tribe Anthemideae > Artemisia > subg. Absinthium |
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. franserioides, A. frigida, A. furcata, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris |
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. franserioides, A. frigida, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris |
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| Ajania globularia, A. norvegica subsp. globularia |
A. monocephala, A. scopulorum var. monocephala |
| Chamisso ex Besser: Nouv. Mém. Soc. Imp. Naturalistes Moscou 3: 64. (1833) |
A. Gray: in A. Gray et al., Syn. Fl. N. Amer. ed. 2, 1(2): 453. (1886) |
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