Flora of North America species comparison

erect to spreading or recurved, green when young, soon becoming tan to brown, then nearly black when older, highly branched, twigs glabrous, glandular, usually resinous.

erect to spreading, reddish tan, becoming darker, branched, short-stipitate-glandular, usually resinous.

ascending to spreading;

blades usually elliptic to oblanceolate, occasionally spatulate, 10–15 × 0.5–1.5 mm, mostly adaxially sulcate, margins entire, midnerves usually obscure to weakly evident, apices acute, apiculate, faces glandular, sometimes irregularly gland-dotted (in shallow pits), resinous;

axillary fascicles present, persistent.

ascending to spreading;

blades elliptic to narrowly oblanceolate (flat or somewhat concave adaxially), 10–35 × 2–5 mm, midnerves evident (often with 1–2 fainter, collateral veins), apices acute, apiculate, faces short-stipitate-glandular, usually gland-dotted;

axillary fascicles absent.

0.2–5 mm (mostly ebracteate, glabrous).

1–10 mm (bracts 1–5, resembling phyllaries, stipitate-glandular).

obconic, 5.5–7.5 × 2.5–4 mm.

obconic, 5.5–7.5 × 2.5–4 mm.

1–7;

laminae elliptic, 3–4 × 0.8–1.3 mm.

1–8;

laminae elliptic, 3–4 × 0.8–1.3 mm.

4–8;

corollas 4.5–6.5 mm.

5–15;

corollas 5–7 mm.

22–30 in 4–5 series, mostly tan, lanceolate to elliptic, 2–6.5 × 0.5–1.2 mm, strongly unequal, outer sometimes herbaceous or herbaceous-tipped (body apices obtuse or truncate to retuse, appendages erect), midnerves not evident or slightly raised, slightly expanded subapically, (mostly margins narrowly membranous, entire) apices acute to acuminate or attenuate, mid often aristate to cuspidate, abaxial faces glabrous, resinous.

30–40 in 4–5 series, tan, lanceolate to elliptic, 2–7 × 0.5–1.2 mm, strongly unequal, mostly chartaceous (bodies abruptly constricted at bases of appendages), midnerves faint, (margins membranous, sparsely ciliate apically), apices (usually recurved) usually acute to cuspidate, sometimes long-acuminate, abaxial faces glabrate, often gland-dotted.

in congested, cymiform arrays (0.5–2.5 cm wide).

in cymiform arrays (to 4 cm wide).

tan, narrowly oblanceoloid, 4–5.5 mm, glabrous or densely sericeous;

pappi tan, 4–5.5 mm.

usually tan, sometimes reddish, narrowly obconic, 4–5.5 mm, glabrous or densely sericeous;

pappi whitish tan, 4–5.5 mm.

= 18.