Flora of North America species comparison

1–5(–15), usually purple-red-tinted proximally, branched distally, glabrous or ± 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), glabrous, gland-dotted;

mid leaves simple or lobed (lobes 3, terminal lobes 2–4 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).

1–3.2 cm, glabrous or ± hairy.

campanulate to urceolate, 6–8 × 6–7 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.

6–8;

corollas yellow, 4.5–8 × 2.5–5 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).

25–50+;

corollas 2.7–3.2 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 7–9, basally connate 1/4–1/3 their lengths, lanceolate, 4.5–6 mm, apices usually rounded;

inner 7–11, obovate, 3.5–4.5 mm, apices 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).

50–250+ per plant, in corymbiform arrays.

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

narrowly obpyramidal, 2–3 mm;

pappi usually of 5 obovate, sometimes aristate, scales 0.9–1.8 mm.

obconic or obpyramidal, glabrous or hairy;

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

= 15.

= 30.