Flora of North America species comparison

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Gutierrezia wrightii

Wright's snakeweed
Habit 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.
Involucres

campanulate, 4.5–7.5 mm diam.
Ray florets

8–19;

corollas yellow, 5–12 mm.
Disc florets

(30–)40–60.
Heads

usually in open arrays.
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).
Phyllary

apices conduplicate, swollen (appearing abaxially keeled).
2n

= 8.

Gutierrezia wrightii
Phenology Flowering Jul–Oct(–Nov).
Habitat Meadows and clearings in pine, pine-oak, and pine-fir woods, ditches, road cuts, alluvium
Elevation 1800–2800 m (5900–9200 ft)
Distribution
from FNA
AZ; NM; Mexico (Chihuahua, Sinaloa, Sonora)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 90.
Parent taxa Asteraceae > tribe Astereae > Gutierrezia
Sibling taxa
G. arizonica, G. californica, G. microcephala, G. petradoria, G. pomariensis, G. sarothrae, G. serotina, G. sphaerocephala, G. texana
Synonyms Xanthocephalum wrightii
Name authority A. Gray: Smithsonian Contr. Knowl. 5(6): 78. (1853)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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