Wyethia arizonica A. Gray
Family: Asteraceae
Arizona mule-ears,  more...
Wyethia arizonica image
Max Licher  
Plants 20-30(-100) cm. Basal leaves: blades elliptic or lance-elliptic to lanceolate, 12-30 cm, margins entire, not ciliate, faces usually ± hirsutulous or scabrellous, sometimes glabrate; cauline leaves mostly smaller, narrower, distal-most usually petiolate, rarely sessile and clasping. Heads borne singly or 2-4+ in ± corymbiform arrays. Involucres turbinate to hemispheric, 18-25+ mm diam. Phyllaries 16-34, subequal, ± herbaceous, margins ciliate, faces glabrous or strigillose to hispidulous; outer 18-22(-30) mm (not or seldom surpassing discs). Ray florets 11-12; laminae (25-)35-50 mm (abaxially hirsutulous). Cypselae 9-10 mm, glabrous. 2n = 38. Flowering Apr-Jun. Meadows, openings in pine, oak, or spruce-fir forests; 600-2200(-3000) m; Ariz., Colo., N.Mex., Utah. At the northern margin of the range, glabrate plants with the general habit of Wyethia arizonica (introgressants with W. amplexicaulis) exhibit greater frost-hardiness (a characteristic of W. amplexicaulis) than do other members of the species.

General: Perennial, 20-100 cm tall; stems 1 to few, erect, branched from the base, hirsute-pubescent, becoming nearly glabrous with age; caudex rarely branched; taproot woody, stout, relatively large. Leaves: Basal and cauline, alternate, firm, elliptic, lance- elliptic, or lanceolate, 12-30 cm long, 3-10 cm wide, the cauline blades much reduced, surfaces more-or-less hirsute, sometimes minutely scabrous or nearly glabrous, margins entire; basal blades petiolate, cauline blades usually petiolate, seldom sessile and clasping. Flowers: Heads solitary or 2-3 in cyme- to corymb-like arrays; involucre hemispheric to saucerlike, mostly 6-12 mm long, 10-20 mm wide; phyllaries 12-18 or more, in 1-2 series, strigose, often spreading; ray flowers mostly 10-15, 8-20 mm long, yellow, the tips deeply 3-toothed; disk flowers 80-150 or more, yellow; flowers June-September. Fruits: Achene, prism-shaped, 8-10 mm long, faintly 3-4 angled, glabrous; pappus absent. Ecology: Open to wooded slopes, woodland openings; 2000-2900 m (6500-9500 ft); Apache, Coconino, Gila, Greenlee, Navajo, and Yavapai counties; southwestern U.S. Notes: Balsamorhiza sagittata (arrowleaf balsamroot) is a perennial, mostly 20-40 cm tall, with long petiolate, rounded triangular basal leaves 5-25 cm long, 3-15 cm wide, the surfaces whitish, silvery, to gray-green; heads are usually solitary, borne on long peduncles; ray flowers are mostly 5-21, 2-4 cm long, yellow; disk flowers are numerous, yellow to orange. It occurs in open habitats, meadows, sagebrush, and forested communities at 900-2400 m (3000-8000 ft). Editor: Springer et al. 2008
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Max Licher  
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
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Wyethia arizonica image
Wyethia arizonica image
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Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Shelley Silva  
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image
Wyethia arizonica image