Flora of North America species comparison

single, greenish when young, becoming tan to gray, fastigiately branched (± angled from leaf bases), glabrous or scabridulous.

3–20+ (erect), green, simple (± ridged), sparsely stipitate-glandular, resinous.

ascending;

blades with midnerves plus 2 fainter collateral nerves evident, broadly linear to lanceolate or oblong, 20–75 × 3–8 mm, flat, margins scabrellous, apices acute to acuminate, faces glabrous, gland-dotted (in shallow pits).

cauline, crowded near base of current year growth, mostly ascending;

blades with midnerves prominent usually plus 2 evident, collateral veins, elliptic to narrowly oblanceolate, 20–40 × 2–3.5 mm, flat to ± concave adaxially, margins entire, scarious, stipitate-glandular, apices acute, faces usually glabrous or stipitate-glandular, adaxially pustulate, gland-dotted and resinous along major nerves.

obconic, 4.5–7 × 1.5–2.2 mm.

obconic to subhemispheric, 6–8 mm.

with 0–2 scales, 0–0.5 mm.

without scales.

0.

5–8;

laminae elliptic to narrowly obovate, 3.5–5 × ca. 1 mm.

(4–)5(–6);

corollas 4–5.5 mm, glabrous, lobes 1–1.5 mm;

style branches 1.9–2.3 mm, appendages subulate, 0.7–1.1 mm.

10–15;

corollas 4.3–4.7 mm, glabrous, lobes 0.5–1 mm;

style branches exserted, ca. 2.5 mm, appendages lanceolate, ca. 1.7 mm.

15–18 in 3–4 series, in 5 vertical ranks, mostly tan, midnerves evident on distal 1/2, ± keeled, elliptic to lanceolate, 0.7–6.5 × 0.5–1.1 mm, unequal, outer often thickened and herbaceous subapically, apices acute, acuminate, or rounded, faces glabrous or sparsely scabrous.

24–30 in 3–4 series, green to tan, midnerves evident, ovate or lanceolate to elliptic, 3.5–7 × 0.7–1.3 mm, subequal, herbaceous or herbaceous-tipped (outer), usually chartaceous (inner), usually flat to convex, margins narrowly scarious, sometimes sparsely ciliate, apices attenuate to cuspidate (outer), acuminate to acute (inner), faces glabrous, resinous.

in corymbiform arrays 3–12 cm wide.

in corymbiform arrays 1–4 cm wide.

tan to brownish, subcylindric, 2.5–3.5 mm, 10–12-ribbed, densely hairy;

pappi whitish tan, 4.5–7 mm.

tan, oblong, 1.5–2.3 mm, 5–7 ribbed, faces moderately hairy;

pappi tan (fine, barbellate), 3–5 mm.

= 18.

= 18.