Koanophyllon
thoroughwort, umbrella thoroughwort
erect, branched.
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.
obconic to hemispheric, 2–3 mm diam.
flat or convex, epaleate.
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.
persistent (at least outermost), 7–16 in 1–2[–4] series, 3-nerved, ovate to lanceolate, ± equal or unequal.
discoid, in corymbiform to paniculiform arrays.
prismatic, 5-ribbed, sparsely hispidulous or piloso-strigose, sometimes gland-dotted;
pappi persistent, of 30–35, barbellate bristles in 1 series.
= 10.
Koanophyllon
Species ca. 115 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaf blades ovate to ovate-deltate or ovate-lanceolate, abaxial faces densely gland-dotted | K. 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 | K. 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 | K. palmeri |
WildflowerSearch
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USDA Plants Database
