Gutierrezia wrightii A. Gray
Family: Asteraceae
Wright's snakeweed
[Greenella discoidea A. Gray,  more]
Gutierrezia wrightii image
Patrick Alexander  
Annuals, 30-200 cm. Stems glabrous. Leaves: proximal usually persistent at flowering, cauline blades obscurely (1-), 3-, or 5-nerved, mostly narrowly elliptic-lanceolate, 40-70 × 2-4 mm, reduced distally. Heads usually in open arrays. Involucres campanulate, 4.5-7.5 mm diam. Phyllary apices conduplicate, swollen (appearing abaxially keeled). Ray florets 8-19; corollas yellow, 5-12 mm. Disc florets (30-)40-60. Cypselae 0.7-2 mm, faces (pebbly or warty with raised, blisterlike oil cavities) glabrous; pappi coroniform, 0.1-0.2 mm (margins entire or obscurely denticulate or erose). 2n = 8. Flowering Jul-Oct(-Nov). Meadows and clearings in pine, pine-oak, and pine-fir woods, ditches, road cuts, alluvium; 1800-2800 m; Ariz., N.Mex.; Mexico (Chihuahua, Sinaloa, Sonora).
FNA 2006
Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Annual, 0.5-2 m, generally herbaceous with glabrous, green stems, sometimes woody near the base. Leaves: Blades 3-5 nerved, proximal usually persistent at flowering. Flowers: Heads borne in open arrays, involucres campanulate, large, 4.5-7.5 mm in diameter, phyllaries folded lengthwise in half, appearing swollen and abaxially keeled. Rays yellow, 8-19, discs 40-60. Fruits: Cypselae 0.7-2 mm, faces with blister-like oil cavities, appearing warty, pappi resembling a crown in shape. Ecology: Found in alluvium in meadows and clearings in pine and pine-oak or pine-fir woodlands, also in ditches and woodcuts, from 6,000-9,000 ft (1800-2800m); flowers July-October. Notes: The key to this species is the 3-5 nerved leaves, other species in this genus have 1-nerved leaves. Also look for the warty-looking achenes. Ethnobotany: Specific use of species unknown, but uses for the genus. Etymology: Gutierrezia is named for Pedro Gutierrez (Rodriguez), a 19th century Spanish noblemen and botanist, while Wrightii refers to Charles Wright (1811-1885), a naturalist who collected specimens for Harvard. Synonyms: None Editor: LCrumbacher 2011
Gutierrezia wrightii image
Patrick Alexander  
Gutierrezia wrightii image
Patrick Alexander  
Gutierrezia wrightii image
Patrick Alexander  
Gutierrezia wrightii image
Gutierrezia wrightii image
Sue Carnahan  
Gutierrezia wrightii image
Jillian Cowles  
Gutierrezia wrightii image
Jillian Cowles  
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