Flora of North America species comparison

erect, slender, rounded, smooth, glabrous or stipitate-glandular proximal to heads.

erect to ascending, slender, striate-angled, glabrous, scarcely resinous.

often withering and sparse by flowering;

sessile;

blades (1-nerved) filiform to linear-oblanceolate, 10–30 × 1–3 mm (slightly fleshy), bases narrowed, margins entire (revolute), apices acute (mucronate), faces glabrous, gland-dotted.

usually present at flowering;

sessile;

blades (1-nerved) linear-oblanceolate to narrowly oblong, 20–40(–80) × 4–8 mm, bases cuneate, margins evenly serrate (teeth spinulose, apices acute, faces finely gland-dotted, not resinous).

funnelform;

staminate 3–5 mm, pistillate 3–5 mm.

campanulate;

staminate 3–6 mm, pistillate 3–6 mm.

ca. 25;

corollas 2.5 mm.

30;

corollas 2.2–3 mm.

15–22;

corollas 4 mm.

20–30;

corollas 3 mm.

lanceolate (not keeled), 1–4 mm, margins ciliate, chartaceous, apices acute to acuminate (abaxial faces scurfy-glandular).

lanceolate, 1–5 mm, margins scarious, erose-ciliate, medians green, apices acute or obtuse (erose, abaxial faces glabrous).

borne singly or in (pedunculate clusters) in loose paniculiform or racemiform arrays.

(10–50+) in terminal, compact, rounded paniculiform arrays.

2–3 mm, 10-nerved, glabrous or ciliate along nerves;

pappi 7–10 mm.

1.5–2.2 mm, 5-nerved, glabrous;

pappi 4–6 mm.

= 18.