Flora of North America species comparison

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

simple, erect or procumbent, rigid (woody proximally), herbaceous and leafy distally (dying back annually), striate-angled, glabrous, non-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.

present at flowering;

sessile;

blades (1-nerved) linear to narrowly lanceolate, 10–40 × 1–4 mm, bases narrowed, margins minutely undulate, apices acute, faces glabrous, gland-dotted (distal leaves reduced, scalelike).

campanulate to obconic;

staminate 4–5 mm, pistillate 5–6 mm.

campanulate;

staminate 4–7 mm, pistillate 7–9 mm.

15–25;

corollas 3–4 mm.

20–30;

corollas 3.5–4 mm.

20–30;

corollas 4–5 mm.

15–20;

corollas 4–5 mm.

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

lanceolate, 1–7 mm, margins scarious, erose-ciliate, medians green (midribs dark, keeled, dilated), apices acute to acuminate (erose-ciliate, abaxial faces glabrous, minutely papillose-gland-dotted).

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

(on short peduncles) in loose corymbiform arrays.

1.5–2 mm, 8–10-nerved, glabrous;

pappi 8–9 mm.

3–5 mm, prominently 6–8-nerved, glabrous;

pappi 11–14 mm.