Flora of North America species comparison

3–10(–15), green throughout or purple-red-tinted proximally, branched distally, glabrous or ± sparsely hairy.

1–30+, erect, unbranched or branched, green throughout to purple-red-tinted proximally or distally to purple-red-tinted throughout, glabrous or ± hairy.

blades simple or lobed (lobes 3–13), glabrous or sparsely hairy, gland-dotted;

mid leaves lobed (lobes 3–7, terminal lobes 1.5–2.3 mm wide).

alternate;

blades simple or 1–2-pinnately lobed, ultimate margins entire or toothed, faces glabrous or hairy, usually ± gland-dotted (often in pits).

(1–)2–4.5 cm, glabrous or ± hairy.

subhemispheric to campanulate, 8–11 × 12–15 mm.

subhemispheric, hemispheric, globoid, campanulate, or urceolate, (2.5–)6–32 mm diam.

usually hemispheric, globoid, ovoid, or conic (flat in H. ambigens), smooth or pitted, epaleate.

9–12;

corollas yellow, 10–16 × 4–6.5 mm.

usually (3–)8–13(–16), sometimes 14–34 [0], pistillate, fertile;

corollas (usually withering after flowering, falling early or tardily) yellow or yellow-orange to orange (laminae fan-shaped, lobes 3–5).

50–125+;

corollas 3.5–4.2 mm.

usually 25–150(–400+), usually bisexual and fertile (6–15, functionally staminate in H. ambigens);

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

in 2 series, unequal;

outer 10–12, basally connate 1/4–1/2 their lengths (moderately to strongly keeled), ovate to lanceolate, 4.5–7 mm, apices acuminate to acute;

inner 13–18(–28), obovate, 4–6 mm, apices usually mucronate.

persistent (or inner falling), usually (6–)16–30(–40) in 2 series and unequal, sometimes 28–50 in 2–3 series and subequal (usually spreading to erect in fruit).

10–85+ per plant, in paniculiform to corymbiform arrays.

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

obpyramidal to narrowly obpyramidal, 2.5–3.5 mm;

pappi of 5(–6) obovate, aristate scales (1.5–)2.1–2.8 mm.

obconic or obpyramidal, glabrous or hairy;

pappi 0, or persistent, of 2–11(–15) usually aristate scales.

= 15.

= 30.