Flora of North America species comparison

erect, simple or branched distally, glabrous or sparsely hirsutulous.

mostly cauline (at flowering); alternate; ± sessile;

blades (1- or 3-nerved), lance-linear to linear, margins entire (ciliate), faces glabrous or sparsely hirsutulous.

± cylindric to turbinate or obconic, 1–3+ mm diam.

convex, pitted or smooth, epaleate.

(3–)12–15(–20+), pistillate, fertile;

corollas yellowish, often tinged with purple (laminae inconspicuous).

(4–)15–25+, bisexual, fertile;

corollas pale yellow to purplish, tubes shorter than narrowly cylindric throats, lobes 5, erect, lance-deltate;

style-branch appendages attenuate.

(persistent) (6–)20–30+ in (2–)3–4+ series, appressed, 1-nerved (flat),linear to subulate, unequal (outer shorter), herbaceous, abaxial faces glabrous or sparsely hirsutulous.

radiate, borne singly (tips of branches).

± fusiform (distally attenuate, almost beaked), 5-nerved, glabrous or glabrate (ray) or ± hirsutulous (disc);

pappi persistent (fragile), of (12–)30–40 whitish, barbellulate, apically attenuate bristles in 1(–2) series (subequal or outer shorter).

= 9.