Flora of North America species comparison

± branched, branches notably thickened distally.

1–30(–40), erect, unbranched.

1–60, erect or ± decumbent, unbranched or sparingly branched distally.

all basal, new leaves tightly clustered;

blades (midribs usually pronounced) spatulate or oblanceolate to linear-oblanceolate, entire, glabrous or usually sparsely, sometimes moderately to densely, hairy, densely gland-dotted.

all basal, or basal-proximal, or basal and cauline; alternate; petiolate or sessile;

blades (usually with distinct midribs) mostly oblanceolate to linear or filiform, sometimes lobed, ultimate margins usually entire, sometimes toothed, faces glabrous or ± hairy, eglandular or ± gland-dotted.

(0.5–)2–15 cm, ± hairy proximally, almost always densely lanate distally.

10–12 × 12–15 mm.

hemispheric to campanulate 6–20 mm diam.

hemispheric to conic, shallowly pitted or smooth, epaleate.

7–14;

corollas 11–17 mm.

0 or 7–27, pistillate, fertile;

corollas (usually marcescent) yellow (laminae fan-shaped to oblanceolate, usually 3-lobed).

25–150+;

corollas yellow, 4–4.7 mm.

20–250+, bisexual, fertile;

corollas yellow proximally, yellow or purplish distally, tubes shorter than cylindric to cylindro-campanulate throats, lobes 5, ± deltate.

11–60+ in 3 series (mostly spreading to erect in fruit, distinct, herbaceous; outer with or without scarious margins, abaxial faces ± hairy; mid usually same number as, alternating with, and similar to outer, almost always with ± scarious margins; inner narrower than others, margins scarious).

4–8, 6–8.5 mm, margins (0.3–)0.5–1.2 mm wide, usually conspicuously scarious, abaxial faces ± hairy.

1–10(–40) per plant, borne singly.

radiate or discoid, borne singly or in paniculiform to corymbiform or fastigiate arrays.

3–4 mm;

pappi of 5–7 obovate to oblanceolate, aristate scales 3–4(–4.5) mm.

± obpyramidal, moderately to densely hairy;

pappi persistent, of 4–8 usually aristate, scales.

= 15.