Baccharis salicina

Torrey & A. Gray

Fl. N. Amer. 2: 258. 1842.

Common names: Willow-baccharis Great Plains false willow
Endemic
Basionym: Baccharis salicifolia Nuttall Trans. Amer. Philos. Soc., n. s. 7: 337. 1840,
Synonyms: Baccharis emoryi A. Gray
Treatment appears in FNA Volume 20. Treatment on page 32. Mentioned on page 26, 29, 33.

Shrubs, 100–300 cm (much branched). Stems ascending, striate-angled, glabrous, smooth or minutely roughened, resinous. Leaves present at flowering (numerous and well developed); short-petiolate; blades (at least broader distinctly 3-nerved) oblong to oblanceolate, 25–70 × 5–10 (–20) mm, bases tapering attenuate, margins usually serrate distally (teeth 1–3, coarse irregular, ca. 5 mm apart), sometimes entire, apices acute or obtuse, faces finely gland-dotted. Heads (100–200+, short-pedunculate or sessile) in (large, crowded, leafy) paniculiform arrays. Involucres narrowly obconic to campanulate; staminate 4–7 mm, pistillate 5–9 mm. Phyllaries lanceolate, 2–6 mm, margins scarious, medians green or reddish, apices greenish or purplish, often erose-ciliate, faces glabrous, gland-dotted, resinous. Staminate florets 20–25; corollas 3–5 mm. Pistillate florets 25–30; corollas 3–4 mm. Cypselae 1.2–2 mm, irregularly 8–10-nerved, glabrous; pappi 8–12 mm (elongating in fruit).


Phenology: Flowering May–Nov.
Habitat: Stream banks, alkaline meadows, roadsides
Elevation: 300–1600 m

Distribution

V20-27-distribution-map.gif

Ariz., Calif., Colo., Kans., Nev., N.Mex., Okla., Tex., Utah, Mexico (Baja California), Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango), Mexico (Sonora)

Discussion

Baccharis salicina is recognized by its narrow, gland-dotted leaves with 1–3 irregular teeth on the distal half, heads in loose leafy arrays, campanulate involucres, and cypselae with 8–10 ribs.

The recognition of Baccharis emoryi as a separate species in other floras has been based on its wider, glabrous, eglandular leaves, more cylindric pistillate involucres, and dense whitish pappi. It was said to occur both west of the Rocky Mountains and in western Texas. In our study, expressions of the characters used to distinguish B. emoryi from other species were found to be inconsistent and inadequate to warrant recognition as a distinct species. There appears to be a complex of up to four species—emoryi, salicina, neglecta and angustifolia—that intergrade from west to east. Characteristics progress from broader leaves and larger heads (emoryi form of salicina) to narrow leaves with small heads (neglecta, angustifolia). The delimitation of taxa within this complex merits further investigation.

Selected References

None.

Lower Taxa

None.
... more about "Baccharis salicina"
not tailed +, rounded +  and obtuse +
purplish;greenish +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Scott D. Sundberg† +  and David J. Bogler +
Torrey & A. Gray +
attenuate +  and tapering +
Baccharis salicifolia +
3-nerved +  and 1-nerved +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (7 cm70 mm <br />0.07 m <br />) +
oblong;oblanceolate +
5mm;10mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
Willow-baccharis +  and Great Plains false willow +
not 2-lipped +  and actinomorphic +
whitish +, white +  and pale-yellow +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +, obovoid +  and cylindric +
fertile +  and bisexual +
Ariz. +, Calif. +, Colo. +, Kans. +, Nev. +, N.Mex. +, Okla. +, Tex. +, Utah +, Mexico (Baja California) +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Durango) +  and Mexico (Sonora) +
300–1600 m +
resinous +
gland-dotted;gland-dotted +
pistillate +  and staminate +
winged +  and beaked +
dispersed +
Stream banks, alkaline meadows, roadsides +
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 />) +
narrowly obconic;campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
short-petiolate +
spreading-reflexed;spreading-reflexed +
less deltate +  and lanceovate +
entire +  and serrate +
hispid +  and glabrous +
reddish +  and green +
2-carpellate +
brownish +, whitish +  and tawny +
persistent +
25 +  and 50 +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering May–Nov. +
lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Fl. N. Amer. +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
conic;tholiform;conic;tholiform;flat +
exalbuminous +
1 (?) +  and 20 (?) +
resinous +
roughened +  and smooth +
striate-angled +
appendaged +  and truncate +
papillate +  and smooth +
Baccharis emoryi +
Baccharis salicina +
Baccharis +
species +