Flora of North America species comparison

erect to pendent.

petioles 2–15 mm;

blades deltate-ovate to ovate-rhombic, 6–23 × 5–24 mm, margins usually entire or serrate to serrate-crenate, sometimes shallow-lobed.

mostly cauline; often proximally opposite, distally alternate; petiolate or sessile;

blades usually 3-lobed, ultimate margins entire, toothed, or lobed.

5–25 mm.

campanulate.

campanulate, cylindric, funnelform, or hemispheric, 3–15 mm diam.

flat or convex, pitted, epaleate.

6–10;

corollas white, sometimes pink tinged, laminae broadly oblong to oblong-elliptic, 3–7 × 1.5–3 mm.

0, or (1–)3–18, pistillate, fertile;

corollas cream, yellow, or white (showy or rudimentary).

30–40;

corollas yellow, often purple tinged, tubes 0.8–1 mm, throats tubular to tubular-funnelform, 1.2–1.4 mm, lobes 0.3–0.4 mm.

5–200, bisexual, fertile;

corollas cream, yellow, or white, tubes shorter than or nearly equal to cylindric, funnelform, or campanulate throats, lobes 4, ± deltate (acute; stamens 4; style branches flattened, linear, usually tapering to fine, minutely hairy tips).

13–20, linear-lanceolate to narrow-ovate, 4–5.5 × 1–2 mm.

persistent, 5–28 in (1–)2(–3) series (distinct, linear to ovate, equal or subequal, flat or keeled, glabrous or hairy, apices obtuse, acute, or attenuate).

in corymbiform arrays, 5–7 × 5.5–7 mm.

radiate or discoid, borne singly or in corymbiform arrays.

linear-oblong to oblanceolate, 2–2.8 mm, margins prominently calloused, long-ciliate;

pappi of 2(–3+) barbellulate bristles 1.5–2.5 mm plus crowns of hyaline, laciniate scales.

(black) flattened to subcylindric, linear to oblanceolate or obovate (margins ± calloused and glabrous, hairy, or ciliate, faces usually hairy, sometimes glabrous);

pappi 0, or persistent or falling, of 1–35 bristles plus callous crowns or hyaline scales.

= 17, 19.

= 34.