Difference between revisions of "Baccharis havardii"
in A. Gray et al., Syn. Fl. N. Amer. 1(2): 224. 1884.
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|elevation=1500–2300 m | |elevation=1500–2300 m | ||
|distribution=N.Mex.;Tex.;Mexico (Chihuahua). | |distribution=N.Mex.;Tex.;Mexico (Chihuahua). | ||
| − | |discussion=<p>Found mainly in the Chisos and Davis Mountains of West Texas, Baccharis havardii is distinguished by its short bushy habit, narrow leaves with elongate teeth, and 5-nerved cypselae. G. L. Nesom (pers. comm.) suggested that it is weakly defined and further investigation may demonstrate it should be included in the Mexican species B. sulcata de Candolle (which name would have priority over B. havardii).</p> | + | |discussion=<p>Found mainly in the Chisos and Davis Mountains of West Texas, <i>Baccharis havardii</i> is distinguished by its short bushy habit, narrow leaves with elongate teeth, and 5-nerved cypselae. G. L. Nesom (pers. comm.) suggested that it is weakly defined and further investigation may demonstrate it should be included in the Mexican species B. sulcata de Candolle (which name would have priority over <i>B. havardii</i>).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1884 | |publication year=1884 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V20_16.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Baccharis | |genus=Baccharis | ||
Revision as of 15:21, 18 September 2019
Subshrubs, 15–70 cm (much branched from bases). Stems erect (green to tan), slender, striate-angled, glabrous, resinous. Leaves present at flowering; short-petiolate; blades (1-nerved) narrowly spatulate to linear, 20–40 × 2–3 mm, reduced to bracts distally, bases attenuate, margins entire or toothed (teeth to 2 mm), faces glabrous, gland-dotted, resinous. Heads in broad paniculiform arrays. Involucres cylindro-campanulate; staminate 3 mm, pistillate 4–4.5 mm. Phyllaries lanceolate, 1–4 mm, margins scarious, medians green or brownish, apices obtuse to acuminate (thickened, slightly erose and ciliate). Staminate florets 12–15; corollas 3–4 mm. Pistillate florets 15–20; corollas 3 mm. Cypselae 2–2.5 mm, 5-nerved, glabrous; pappi 4 mm.
Phenology: Flowering Jul–Sep.
Habitat: Dry rocky hillsides, open ground, calcareous gravels
Elevation: 1500–2300 m
Distribution
N.Mex., Tex., Mexico (Chihuahua).
Discussion
Found mainly in the Chisos and Davis Mountains of West Texas, Baccharis havardii is distinguished by its short bushy habit, narrow leaves with elongate teeth, and 5-nerved cypselae. G. L. Nesom (pers. comm.) suggested that it is weakly defined and further investigation may demonstrate it should be included in the Mexican species B. sulcata de Candolle (which name would have priority over B. havardii).
Selected References
None.