Difference between revisions of "Ageratina herbacea"
Phytologia 19: 222. 1970.
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|name=Eupatorium ageratifolium var. herbaceum | |name=Eupatorium ageratifolium var. herbaceum | ||
|authority=A. Gray | |authority=A. Gray | ||
| + | |rank=variety | ||
|publication_title=Smithsonian Contr. Knowl. | |publication_title=Smithsonian Contr. Knowl. | ||
|publication_place=5(6): 74. 1853 | |publication_place=5(6): 74. 1853 | ||
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|name=Eupatorium herbaceum | |name=Eupatorium herbaceum | ||
|authority=(A. Gray) Greene | |authority=(A. Gray) Greene | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Eupatorieae;Ageratina;Ageratina herbacea | |hierarchy=Asteraceae;Asteraceae tribe Eupatorieae;Ageratina;Ageratina herbacea | ||
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name=Ageratina herbacea | name=Ageratina herbacea | ||
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|authority=(A. Gray) R. M. King & H. Robinson | |authority=(A. Gray) R. M. King & H. Robinson | ||
|rank=species | |rank=species | ||
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|publication year=1970 | |publication year=1970 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_1398.xml |
|tribe=Asteraceae tribe Eupatorieae | |tribe=Asteraceae tribe Eupatorieae | ||
|genus=Ageratina | |genus=Ageratina | ||
Latest revision as of 20:10, 5 November 2020
Perennials or subshrubs, (20–)30–60(–80) cm (woody crowns and woody rhizomes). Stems erect (brittle), minutely puberulent. Leaves opposite; petioles 10–25 mm; blades triangular to lanceolate-ovate or ovate, 2–5(–7) × 1.5–3.5(–4.5) cm, bases truncate to shallowly cordate, margins dentate to serrate-dentate, abaxial faces sparsely hispidulous to glabrate, eglandular. Heads clustered. Peduncles 4–15 mm, puberulent. Involucres 4–5 mm. Phyllaries: apices acute, abaxial faces granular-puberulent. Corollas white, glabrous. Cypselae finely strigose-hispidulous. 2n = 34.
Phenology: Flowering (Jul–)Aug–Oct.
Habitat: Pine, pine-oak, juniper, and pinyon-juniper woodlands, rocks along streams, slopes, ridges, washes
Elevation: 1400–2700(–2900) m
Distribution
Ariz., Calif., Colo., Nev., N.Mex., Tex., Utah, Mexico (Baja California, Chihuahua, Coahuila, Sonora).
Discussion
Ageratina herbacea is recognized by the distinctive color of its usually yellow-green, sometimes grayish, leaves, granular-puberulent involucres (with minute, thickened, eglandular hairs), and woody rhizomes.
Selected References
None.