Flora of North America species comparison

erect, green, slender and wandlike, striate-angled, glabrate proximally, hispidulous distally (near heads).

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

present at flowering (reduced, sparse);

sessile;

blades (1-nerved) linear to linear-lanceolate, 5–17 × 1–2 mm (reduced distally to subulate bracts), margins entire, apices acute, faces glabrous (sometimes minutely papillose).

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.

funnelform or campanulate;

staminate 3–5.2 mm, pistillate 4–6 mm.

campanulate to obconic;

staminate 4–5 mm, pistillate 5–6 mm.

8–18;

corollas 2–2.8 mm.

15–25;

corollas 3–4 mm.

(8–)12–18(–29);

corollas 3.3–4.2 mm.

20–30;

corollas 4–5 mm.

lanceolate, 1–4 mm, margins scarious, medians green (hispid), apices acute to acuminate.

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

(on racemiform lateral branches) in paniculiform arrays.

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

1.5–2.5 mm, 5-nerved, hispid;

pappi 4.5–7 mm.

1.5–2 mm, 8–10-nerved, glabrous;

pappi 8–9 mm.

= 18.