Flora of North America species comparison

1–10+, suberect to reclining or sprawling, slender, repeatedly branched throughout, divaricately so, glabrous, glaucous.

1–12+, erect or ascending, straight and rigid, sometimes sprawling from base, branching from base and distally, glabrous, glaucous.

cauline;

sessile;

proximal blades linear, 10–20 × 2–3 mm, distal greatly reduced, scalelike, (succulent) bases tapered, margins entire, apices apiculate to spinose, faces glabrous.

mostly cauline;

sessile (± appressed);

blades oblanceolate, 20–30 × 3–5 mm, reduced distally, (thick, succulent) bases broadened, margins entire (incised to dentate in hybrids with A. parviflora) eciliate or with 1–8 cilia per side, apices linear, spiny-mucronate, glabrous;

distal subulate, entire.

5–7 × 4–7 mm in flower.

hemispheric, 10–12 × 10–16 mm (fresh).

0.

50–80+;

laminae bluish purple to lavender, 10–12 mm, coiled after flowering.

12–25+;

corollas yellow, 5–6 mm.

45–100+;

corollas yellow, 3.5–5 mm.

in 4–5 series, appressed or spreading, lanceolate, 2–8 mm, bases whitish to tan or tan throughout, margins entire to laciniate, apices often green, obtuse to acuminate, faces glabrous.

in 4–5 series, appressed, linear-lanceolate, 2–8 mm, bases whitish to tan, margins entire to laciniate, apices green, acute to acuminate, glabrous.

borne singly (terminal), in diffuse, bracteate, cymiform arrays.

borne singly (terminal), often in loose, leafy, cymiform arrays.

subcylindric, 2.5–3 mm, 7–9-nerved per face, faces sparsely sericeous;

pappi whitish, setose, 4–6 mm.

oblanceoloid, 2.5–3 mm, 11–13-nerved per face, faces sparsely sericeous;

pappi: white, setose;

ray 3–3.5 mm;

disc 3–4 mm.

= 10.

= 10.