Flora of North America species comparison

erect to ascending, striate-angled, glabrous or minutely scurfy, not resinous.

erect, striate, sharply angled, green distally, glabrous, resinous.

present at flowering (not in fascicles);

petioles to 7 mm;

blades obovate or elliptic to rhombic, 20–60 × 8–40 mm, leathery, bases cuneate to attenuate, margins serrate (teeth 1–3 per side distal to middles, relatively broad), apices acute, faces glabrous, abaxial black gland-dotted (distal reduced, entire), adaxial eglandular.

cauline (proximal withered and/or sparse at flowering);

sessile;

blades (1-nerved) linear-lanceolate, 5–15 × 1–2 mm, reduced to scales distally, thick, bases narrowed, margins entire (often revolute), apices acute, faces glabrous, minutely gland-dotted, resinous.

campanulate to obconic;

staminate 4–5 mm, pistillate 5–6 mm.

cylindric to hemispheric;

staminate 4–5.2 mm, pistillate 3–8 mm.

15–25;

corollas 3–4 mm.

19–31;

corollas 2.5–3.5 mm.

20–30;

corollas 4–5 mm.

18–35;

corollas 4.2–5 mm.

ovate to lanceolate, 1–4 mm, margins scarious, medians green, apices rounded or obtuse (sometimes purplish).

ovate to lanceolate, 1–5 mm, margins yellowish, slightly scarious, medians green to yellow, apices rounded to acute (greenish, abaxial faces glabrous, resinous).

(1–4, sessile or subsessile) in axillary glomerules scattered along branches.

borne singly (on nearly leafless branches) or (laterally on branchlets) in dense paniculiform arrays.

1.5–2 mm, 8–10-nerved, glabrous;

pappi 8–9 mm.

2–2.6 mm, finely 8–10-nerved, glabrous;

pappi 7–12 mm.

= 18.