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 or all ± equal, 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 18–56 × 1.9–5.9 mm, widest intersinus distance 0.7–2.1 mm;

proximal oblanceolate to elliptic, margins dentate to pinnate, teeth or lobes 6–12, perpendicular to leaf axis, 0.8–2.1 mm;

distal elliptic, lanceolate, or linear, base not clasping, margins usually dentate, rarely entire, teeth (0–)4–6, perpendicular to leaf axis, 0.4–2.1 mm;

abaxial surface with simple grappling-hook, complex grappling-hook, and needlelike trichomes, adaxial surface with simple grappling-hook, needlelike, and rarely complex grappling-hook 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, 8.7–14.2 × 3.1–4.7 mm, apex rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 7–13.1 × 2–3.3 mm, without anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 6.2–8.3 mm.

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

cup-shaped to cylindric, 5.9–10.3 × 3.8–4.8 mm, base rounded to occasionally tapering, not longitudinally ridged.

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

coat anticlinal cell walls wavy, papillae 24–27 per cell.

= 22.

= 22.