Flora of North America species comparison

solitary, erect, straight;

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

multiple, erect or decumbent, straight;

branches along entire stem, distal longest, antrorse, upcurved; hairy.

blade 31–92(–157) × 10.5–27.6(–41) mm, widest intersinus distance 5.2–23.3(–29) mm;

proximal lanceolate or elliptic, margins serrate to pinnate, teeth or lobes 8–22, slightly antrorse, 1.8–6 mm;

distal lanceolate, base clasping, margins usually serrate to pinnate, occasionally entire, teeth or lobes (0–)10–20, slightly antrorse, 1.4–7.6 mm;

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

blade 18.8–62.7 × 11–36 mm, widest intersinus distance 8.9–28.8 mm;

proximal broadly elliptic to obovate, margins dentate to serrate, teeth 8–12, slightly antrorse or perpendicular to leaf axis, 1–4 × 1.7–6 mm;

distal ovate or obovate, base not clasping, margins dentate to serrate, teeth 6–12, slightly antrorse or perpendicular to leaf axis, 1–3.5 mm;

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

margins entire.

margins entire.

petals golden yellow, 5.7–9.2 × 1.3–3 mm, apex usually acute, occasionally rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 4.7–8.4 × 1–2.4 mm, without anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 3.5–5.4 mm.

petals golden yellow, 6.7–9.5(–12.6) × 2.3–5.8 mm, apex rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 5.4–9.2(–11) × 1.3–2.7 mm, with anthers, second whorl with anthers;

anthers twisted after dehiscence, epidermis smooth;

styles 4.1–6.8(–9) mm.

cylindric, 13.6–23.5 × 5.1–7.8 mm, base tapering, not or slightly longitudinally ridged.

cup-shaped, 5–9.8 × 5–8 mm, base rounded, not longitudinally ridged.

coat anticlinal cell walls straight, papillae 4–17 per cell.

coat anticlinal cell walls straight, papillae 3–5 per cell.

= 22.

= 20, 22.