Flora of North America species comparison

ascending, green becoming tan, glabrous, resinous.

ascending, green, sparsely to densely puberulent, sparsely glandular.

ascending to spreading;

sessile;

blades with faint midnerves, linear-filiform, 10–40 × 0.5–2 mm, flat or sulcate, sometimes twisted, margins glabrous or hirtellous, apices acute to apiculate, faces glabrous.

ascending to spreading;

sessile;

blades with faint midnerves and pair of collaterals, narrowly elliptic to oblanceolate, 10–30 × 0.7–1.2 mm, flat to sulcate, apices acute (often apiculate), faces moderately puberulent, sparsely stipitate-glandular.

cylindric to turbinate, 5–8 × 1.5–2.5 mm.

turbinate, 6–10 × 3–4 mm.

4–5;

corollas 3.7–5.5 mm, lobes 0.8–1.5 mm;

style branches 2–2.4 mm (exserted beyond spreading corolla lobes), appendages 0.5–0.8 mm (shorter than stigmatic portion).

2–3(–4);

corollas 5.5–8 mm, lobes 1–1.7 mm;

style branches 2–2.7(–3.4) mm (included in or barely surpassing spreading corolla lobes), appendages 0.8–1.4 mm (lengths about equaling stigmatic portion).

15–20 in 3–4 series, often in vertical ranks or spirals, mostly tan, ± greenish apically, midveins rarely visible, ovate or oblong to elliptic, 1.5–5 × 0.8–1.4 mm, unequal, mostly chartaceous, sometimes ± keeled, apices acuminate to cuspidate (cusp often recurved or falcate), faces glabrous or with a few long, crooked hairs proximally and near margins, resinous.

(12–)14–18 in 3–4 series, ± in vertical ranks, mostly tan, sometimes green-tipped, ovate or oblong to elliptic, unequal, 2.5–7.5 × 1–1.8 mm, chartaceous, outer ± herbaceous wholly or distally, weakly keeled, midveins faint, apices acute to obtuse, faces sparsely puberulent.

in densely cymiform arrays (4 cm wide), distal leaves reaching into but not overtopping arrays.

in densely cymiform arrays, often overtopped by distal leaves.

reddish brown, turbinate, 3–4 mm, faces densely hairy;

pappi tan, 3.7–5 mm.

reddish brown, turbinate, 4–6 mm, densely hairy;

pappi tan, 5–7 mm.

= 18.

= 18.