Flora of North America species comparison

erect, often scapiform (1 stem per crown in biennials, usually 3+ in perennials).

mostly basal or basal and cauline; alternate;

petiolate;

blades usually 1–2+ times pinnately lobed (lobes usually ± filiform), ultimate margins usually entire, rarely toothed, faces glabrous or hairy, often tomentose, usually gland-dotted as well.

mostly basal or basal and cauline; alternate;

petiolate or sessile;

blades deltate to lanceolate overall, usually 1–2-pinnately or palmati-pinnately lobed, lobes usually filiform, ultimate margins entire or toothed, faces glabrous or hairy, often tomentose, usually gland-dotted.

obconic to hemispheric, 4–15+ mm diam.

obconic to hemispheric.

flat or convex, epaleate (except H. newberryi).

flat or convex, usually epaleate (paleae scarious, conduplicate, each ± investing subtended floret in H. newberryi).

0 or 8, pistillate, fertile;

corollas white to ochroleucous.

usually 0, sometimes 8, pistillate, fertile;

corollas white or whitish.

12–70+, bisexual, fertile;

corollas usually yellow to ochroleucous or whitish to purplish, tubes longer than or about equaling funnelform or abruptly dilated, campanulate throats, lobes 5 (reflexed at anthesis).

12–70+, bisexual, fertile;

corollas yellow or whitish to purplish, tubes longer than or about equaling funnelform or abruptly dilated, campanulate throats, lobes 5, ± deltate (reflexed at anthesis);

anther thecae pale;

stigmatic papillae in 2 lines.

5–13+ in 2–3+ series, subequal, usually membranous- or scarious-margined (often yellowish, whitish, or purplish).

persistent or tardily falling, 5–13+ in 2+ series (distinct, often yellowish, whitish, or purplish, orbiculate to lance-linear, subequal, often ± petaloid, margins usually notably membranous or scarious).

0.

radiate or discoid, in ± corymbiform arrays.

usually discoid, rarely radiate, usually in ± corymbiform arrays.

obpyramidal (4-, sometimes 5-angled, each face usually 1–4-ribbed, glabrous or hirtellous to villous);

pappi 0 or of 12–22 orbiculate to spatulate scales.

obconic to obpyramidal, usually 4-angled and 12–16-ribbed, glabrous or hairy;

pappi 0 or of 12–22 orbiculate to spatulate scales.

= 17.