Flora of North America species comparison

usually 1, ± erect [decumbent to ascending], branched mostly from bases [± throughout], often tomentose to lanate, sometimes glabrate or glabrous [sericeous] (hairs mostly medifixed) and gland-dotted.

cauline [mostly basal]; alternate;

petiolate or sessile;

blades narrowly oblong or spatulate to linear, usually 1-pinnately lobed (lobes usually crowded and overall effect ± vermiform), ultimate margins entire or ± crenate, faces usually arachnose or tomentose to lanate, sometimes glabrate or glabrous [sericeous].

campanulate to hemispheric or broader, [3–]6–10[–12+] mm diam.

convex to hemispheric, paleate;

paleae ± lanceolate, ± navicular (each with central resin duct).

0.

mostly 60–250+, bisexual, fertile;

corollas pale to bright or deep yellow [whitish], tubes often compressed (± winged and/or saccate, ± clasping apices of cypselae), throats ± funnelform, lobes 5, lance-ovate.

persistent (soon indurate), 18–45+ in 3(–5+) series, distinct, lanceolate to elliptic (usually carinate), unequal, margins and apices (usually light to dark brown, sometimes purple) scarious (abaxial faces glabrous or ± arachnose, glabrescent).

discoid, borne singly (pedunculate).

obconic to obovoid, sometimes slightly obcompressed, 3–5-angled, faces glabrous (pericarps sometimes with myxogenic cells, without resin sacs);

pappi 0.

= 9.