Flora of North America species comparison

usually crowded, green;

blades 3-nerved (only midnerves prominent), linear, 30–80 × 2–3 mm, faces glabrous or puberulent, often minutely stipitate-glandular, ± resinous;

distalmost overtopping arrays.

crowded, gray;

blades 1-nerved, spatulate to linear-spatulate, 10–15 × 2–3 mm, faces densely tomentose, eglandular;

distalmost not overtopping arrays.

9–12 mm.

10–12 mm.

8–20;

corollas yellow, 7.9–10 mm, tubes sparsely hairy, throats gradually dilated, lobes 1.4–2.1 mm.

10–18;

corollas 10–12 mm, tubes glabrous or sparsely villous, throats ± abruptly dilated, lobes 1.4–1.5 mm.

10–15, mostly chartaceous, outermost sometimes herbaceous-tipped, apices erect, attenuate.

ca. 16, chartaceous, apices erect (outer sometimes herbaceous, reddish), abruptly acute.

usually 5–12+ in racemiform arrays.

usually 3–5 in ± racemiform arrays.

= 18.

= 18.