Baccharis texana

(Torrey & A. Gray) A. Gray

Mem. Amer. Acad. Arts, n. s. 4: 75. 1849.

Common names: Prairie baccharis or false willow
Basionym: Linosyris texana Torrey & A. Gray Fl. N. Amer. 2: 232. 1842
Treatment appears in FNA Volume 20. Treatment on page 33. Mentioned on page 24.

Perennials or subshrubs, 25–60 cm (rhizomatous, bases woody). Stems simple, erect or procumbent, rigid (woody proximally), herbaceous and leafy distally (dying back annually), striate-angled, glabrous, non-resinous. Leaves present at flowering; sessile; blades (1-nerved) linear to narrowly lanceolate, 10–40 × 1–4 mm, bases narrowed, margins minutely undulate, apices acute, faces glabrous, gland-dotted (distal leaves reduced, scalelike). Heads (on short peduncles) in loose corymbiform arrays. Involucres campanulate; staminate 4–7 mm, pistillate 7–9 mm. Phyllaries lanceolate, 1–7 mm, margins scarious, erose-ciliate, medians green (midribs dark, keeled, dilated), apices acute to acuminate (erose-ciliate, abaxial faces glabrous, minutely papillose-gland-dotted). Staminate florets 15–20; corollas 4–5 mm. Pistillate florets 20–30; corollas 3.5–4 mm. Cypselae 3–5 mm, prominently 6–8-nerved, glabrous; pappi 11–14 mm.


Phenology: Flowering Aug–Nov.
Habitat: Dry prairies, hillsides, mesas, brushy flats
Elevation: 100–200 m

Distribution

V20-30-distribution-map.gif

N.Mex., Okla., Tex., Mexico (Coahuila), Mexico (Nuevo León), Mexico (Tamaulipas)

Discussion

Baccharis texana is recognized by its low, subshrub habit, simple, more or less herbaceous and leafy stems arising from woody bases, narrow leaves with minutely undulate margins, large pedunculate heads, and erose-ciliate phyllaries with dilated midribs.

Selected References

None.

Lower Taxa

None.
... more about "Baccharis texana"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Scott D. Sundberg† +  and David J. Bogler +
(Torrey & A. Gray) A. Gray +
narrowed +
Linosyris texana +
3-nerved +  and 1-nerved +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear;narrowly lanceolate +
1mm;4mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
Prairie baccharis or false willow +
not 2-lipped +  and actinomorphic +
whitish +, white +  and pale-yellow +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +, obovoid +  and cylindric +
fertile +  and bisexual +
N.Mex. +, Okla. +, Tex. +, Mexico (Coahuila) +, Mexico (Nuevo León) +  and Mexico (Tamaulipas) +
100–200 m +
resinous +
gland-dotted +
pistillate +  and staminate +
winged +  and beaked +
dispersed +
Dry prairies, hillsides, mesas, brushy flats +
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 />) +
campanulate +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
spreading-reflexed;spreading-reflexed +
less deltate +  and lanceovate +
serrate +  and entire +
hispid +  and glabrous +
undulate +
2-carpellate +
brownish +, whitish +  and tawny +
persistent +
25 +  and 50 +
1.1 cm11 mm <br />0.011 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Flowering Aug–Nov. +
lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Mem. Amer. Acad. Arts, n. s. +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
conic;tholiform;conic;tholiform;flat +
exalbuminous +
leafy +  and simple +
1 (?) +  and 20 (?) +
non-resinous +
striate-angled +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Baccharis texana +
Baccharis +
species +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +