Flora of North America species comparison

solitary, erect, straight;

branches distal or along entire stem, distal or proximal longest, antrorse, straight, proximal not decumbent; hairy or glabrescent.

solitary, erect, straight;

branches distal, distal longest, antrorse, upcurved; hairy.

blade (23–)29–78.4 × 3–14.6 mm, widest intersinus distance 1.6–8.5 mm;

proximal oblanceolate or elliptic, margins dentate to serrate, teeth 4–12, proximal sides slightly antrorse, distal sides perpendicular to leaf axis, 0.8–5.3 mm;

distal oblanceolate, elliptic, lanceolate, or linear, base not clasping, tapered, margins usually dentate to serrate, rarely entire, teeth (0–)2–10, proximal sides antrorse, distal sides perpendicular to leaf axis, 0.4–5.3 mm;

abaxial surface with simple grappling-hook, complex grappling-hook, and needlelike trichomes, largest trichomes with pearly white bases, adaxial surface with needlelike trichomes.

blade 26–74 × 6–19.2 mm, widest intersinus distance 4.5–11.4 mm;

proximal obovate, oblanceolate, or lanceolate, margins serrate, teeth 8–14, slightly antrorse, 0.6–4.5 mm;

distal elliptic to lanceolate, base not clasping, margins serrate, teeth 6–12, slightly antrorse, 1.3–4.1 mm;

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

margins entire.

margins entire.

petals golden yellow, 8.6–13.9(–17.4) × 2.9–4.7(–6.1) mm, apex rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 6.7–13.2(–15.4) × 1.7–4.3 mm, usually without, rarely with, anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 4.8–11.3 mm.

petals golden yellow, (6.1–)7.3–10 × 1.6–3 mm, apex acute, glabrous abaxially;

stamens golden yellow, 5 outermost not petaloid, filaments linear to narrowly spatulate, not clawed, 4–8 × 0.7–1.5 mm, with anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 3.7–7 mm.

cup-shaped, 6.2–11.4(–13) × 6–8.4 mm, base rounded, not longitudinally ridged.

cup-shaped to cylindric, 10.4–16 × 6.6–9 mm, base tapering or rounded, not longitudinally ridged.

coat anticlinal cell walls wavy, papillae 5–13 per cell.

coat anticlinal cell walls straight, papillae 6–16 per cell.

= 20.

= 22.