Flora of North America species comparison

erect to prostrate, glabrous or glabrate.

erect, usually glabrous, sometimes proximally hirsute (glaucous).

cauline; mostly opposite, petioles 0–1 cm;

blades (light to dark green, 3-nerved at bases) lance-linear to lanceolate, 5–15 × 0.5–2.5 cm, bases cuneate, margins entire, abaxial faces glabrous or scabro-hispid, gland-dotted.

cauline; opposite (proximal) or alternate;

sessile or subsessile;

blades (grayish green or bluish green) lanceolate, 8–15 × 1.5–3.5 cm, bases ± cuneate, margins serrate to subentire, abaxial faces glabrous or glabrate (smooth or slightly rough to touch, glaucous).

2–10 cm.

2–8 cm. cm.

hemispheric, 12–28 mm diam.

cylindric, 10–15 mm diam.

12–16;

laminae 20–35 mm (abaxial faces gland-dotted).

5–10;

laminae 15–20 mm.

40+;

corollas 6.5–7.5 mm, lobes yellow;

anthers usually dull orange or orange-brown, sometimes yellowish, appendages dull orange to yellowish.

35+;

corollas 5.5–6.5 mm, lobes yellow;

anthers dark, appendages dark.

12–18, lanceolate, 11–18 × 1.5–3 mm, apices acute to acuminate, abaxial faces gland-dotted.

23–28, lanceolate, 6–13 × 2–3 mm, (margins sometimes ciliate) apices acuminate, abaxial faces glabrous, not gland-dotted.

1–3.

1–6.

4–5 mm, glabrate;

pappi of 2 aristate scales 3–4.2 mm.

4–5.5 mm, glabrous;

pappi of 2 aristate scales 3.2–4.1 mm plus 0–1 deltate scales 0.5–1.1 mm.

(lanceolate) 9–13 mm, subentire or 3-toothed (apices sparsely hairy, sometimes gland-dotted).

8.5–10 mm, 3-toothed to subentire.

= 34.

= 68.