Flora of North America species comparison

multiple, erect, zigzag or straight;

branches along entire stem, distal longest, antrorse, straight to upcurved;

glabrescent, smooth to touch.

blade 16–84 × 2.2–10.6 mm, widest intersinus distance 2.2–7 mm;

proximal oblanceolate, margins usually entire, occasionally dentate, teeth 0–6(–14), perpendicular to leaf axis, 1–2 mm;

distal elliptic, lanceolate, or linear, base not clasping, margins usually entire, rarely dentate, teeth 0(–6), perpendicular to leaf axis, 0.6–2 mm;

abaxial surface with complex grappling-hook and infrequently needlelike trichomes, adaxial surface with needlelike trichomes.

margins entire.

petals light to golden yellow, 7.8–11(–14.2) × 1.9–2.8(–4.2) mm, apex rounded, glabrous abaxially;

stamens white to light yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 5.9–9.2(–10.1) × 1.2–2.7 mm, with anthers, second whorl with anthers;

anthers twisted after dehiscence, epidermis smooth;

styles 5.2–7.6 mm.

cup-shaped, 4.5–8.8 × 5.8–8.8 mm, base rounded, not longitudinally ridged.

coat anticlinal cell walls straight, papillae 15–24 per cell.

= 22.