Baccharis wrightii

A. Gray

Smithsonian Contr. Knowl. 3(5): 101. 1852.

Common names: Wright’s baccharis or false willow
Treatment appears in FNA Volume 20. Treatment on page 34. Mentioned on page 25.

Subshrubs or shrubs, 10–80 cm (much branched from woody caudices, aerial stems sometimes dying back). Stems erect and slender or short and branched, prominently striate-angled, glabrous, eglandular. Leaves (reduced) proximal often withered and absent at flowering; sessile; blades oblanceolate to narrowly oblong, 5–10 (–25) × 1–3 (–7) mm (thin), bases narrowed, margins entire or finely serrate (teeth aristate), faces eglandular, not resinous (distal reduced to linear or oblong scales). Heads usually borne singly (terminal on slender branches). Involucres broadly campanulate to hemispheric; staminate 5–9 mm, pistillate 9–14 mm. Phyllaries narrowly lanceolate, 2–6 mm (not keeled), medians green or brown, margins scarious, apices acute or acuminate (erose, abaxial faces glabrous, eglandular). Staminate florets 20–30; corollas 4.5–6 mm. Pistillate florets 20–30; corollas 3–5 mm. Cypselae 3–5 mm, strongly 5–10-nerved, papillose-roughened, glandular; pappi 15–20 mm (often brownish). 2n = 18.


Phenology: Flowering Apr–Jul.
Habitat: Dry sandy plains
Elevation: 500–2000 m

Distribution

V20-33-distribution-map.gif

Ariz., Colo., Kans., N.Mex., Okla., Tex., Utah, Mexico (Chihuahua), Mexico (Durango), Mexico (Sonora)

Discussion

Baccharis wrightii is recognized by its bushy, broomlike habit, stems woody only at bases, relatively small, non gland-dotted leaves, early flowering period, heads borne singly, conspicuous, brownish pistillate pappi, and relatively large, strongly nerved cypselae.

Selected References

None.

Lower Taxa

None.
... more about "Baccharis wrightii"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Scott D. Sundberg† +  and David J. Bogler +
A. Gray +
narrowed +
3-nerved +  and 1-nerved +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
oblanceolate;narrowly oblong +
1mm;3mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
Wright’s baccharis or false willow +
not 2-lipped +  and actinomorphic +
whitish +, white +  and pale-yellow +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
hispid +  and glabrous +
papillose-roughened +
compressed +, obovoid +  and cylindric +
fertile +  and bisexual +
Ariz. +, Colo. +, Kans. +, N.Mex. +, Okla. +, Tex. +, Utah +, Mexico (Chihuahua) +, Mexico (Durango) +  and Mexico (Sonora) +
500–2000 m +
not resinous +
gland-dotted +
villous +, hispidulous +  and glabrous +
pistillate +  and staminate +
winged +  and beaked +
dispersed +
Dry sandy plains +
racemiform +, corymbiform +  and paniculiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
pistillate +  and staminate +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
broadly campanulate;hemispheric +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
spreading-reflexed;spreading-reflexed +
less deltate +  and lanceovate +
serrate +  and entire +
hispid +  and glabrous +
brown +  and green +
2-carpellate +
brownish +, whitish +  and tawny +
persistent +
25 +  and 50 +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Apr–Jul. +
lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Smithsonian Contr. Knowl. +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
conic;tholiform;conic;tholiform;flat +
exalbuminous +
eglandular +  and branched +
1 (?) +  and 20 (?) +
resinous +
striate-angled +
short +  and slender +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Baccharis wrightii +
Baccharis +
species +
shrub +  and subshrub +