Difference between revisions of "Koanophyllon"
in H. Koster, Trav. Brazil, 495. 1816.
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|accepted_name=Koanophyllon | |accepted_name=Koanophyllon | ||
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|title=in H. Koster, Trav. Brazil, | |title=in H. Koster, Trav. Brazil, | ||
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name=Koanophyllon | name=Koanophyllon | ||
|author=Guy L. Nesom | |author=Guy L. Nesom | ||
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|rank=genus | |rank=genus | ||
|parent rank=tribe | |parent rank=tribe | ||
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|publication year=1816 | |publication year=1816 | ||
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|tribe=Asteraceae tribe Eupatorieae | |tribe=Asteraceae tribe Eupatorieae | ||
|genus=Koanophyllon | |genus=Koanophyllon | ||
Latest revision as of 20:10, 5 November 2020
Perennials, subshrubs, or shrubs [trees, vines], 40–200+ cm. Stems erect, branched. Leaves cauline; mostly opposite (distal sometimes alternate); petiolate; blades usually 3-nerved from bases, mostly deltate or ovate to triangular-lanceolate or lanceolate (lacking internal translucent lenses or streaks), margins entire or dentate, faces glabrous or sparsely hispidulous, puberulent, or strigose, sometimes sparsely to densely gland-dotted. Heads discoid, in corymbiform to paniculiform arrays. Involucres obconic to hemispheric, 2–3 mm diam. Phyllaries persistent (at least outermost), 7–16 in 1–2[–4] series, 3-nerved, ovate to lanceolate, ± equal or unequal. Receptacles flat or convex, epaleate. Florets 3–13[–20]; corollas whitish to pinkish [violet], throats funnelform (lengths ca. 2.5 times diams.); styles: bases sometimes enlarged, glabrous, branches filiform to obscurely clavate. Cypselae prismatic, 5-ribbed, sparsely hispidulous or piloso-strigose, sometimes gland-dotted; pappi persistent, of 30–35, barbellate bristles in 1 series. x = 10.
Distribution
s, w United States, Mexico, West Indies, Central America, South America.
Discussion
Species ca. 115 (3 in the flora).
Selected References
None.
Key
| 1 | Leaf blades ovate to ovate-deltate or ovate-lanceolate, abaxial faces densely gland-dotted | Koanophyllon villosum |
| 1 | Leaf blades lanceolate to triangular-lanceolate, abaxial faces eglandular or sparsely gland-dotted | > 2 |
| 2 | Leaves usually opposite, sometimes subopposite to alternate on distal 1/3 of stems, blade apices acuminate, adaxial faces glabrous; involucres 4.5–5.5 mm; phyllaries: outermost narrowly lanceolate, glabrous, margins hyaline on proximal 2/3, eciliate | Koanophyllon solidaginifolium |
| 2 | Leaves opposite, blade apices acute, adaxial faces sparsely strigose to hispidulous; involucres (3–)3.5–4 mm; phyllaries: outermost ovate-elliptic or obovate to narrowly oblong-lanceolate, puberulent, margins herbaceous, usually weakly ciliate | Koanophyllon palmeri |