Flora of North America species comparison

solitary, erect, straight;

branches distal or along entire stem, proximal or distal longest, antrorse, straight to upcurved; hairy.

multiple, erect, zigzag;

branches distal or along entire stem, distal longest or all ± equal, antrorse, straight to upcurved; hairy.

blade 72–295 × 14–45 mm, widest intersinus distance 10.1–23.3 mm;

proximal oblanceolate or elliptic, margins serrate to pinnate, teeth or lobes 16–26, slightly antrorse, 1–16.5 mm;

distal elliptic to lanceolate, base clasping or not, margins serrate to pinnate, teeth or lobes 9–20, slightly antrorse, 5.3–13.7 mm;

surfaces with needlelike trichomes.

blade 14–26.3 × 5.1–10.8 mm, widest intersinus distance 2.3–5.2 mm;

proximal oblanceolate to elliptic, margins usually 3-fid, rarely entire or pinnate, teeth or lobes usually 2, rarely 0 or 4, perpendicular to leaf axis, 0.8–2.7 mm;

distal elliptic, base not clasping, margins 3-fid to occasionally pinnate, teeth or lobes usually 2, occasionally 4, perpendicular to leaf axis, 1.5–3.5 mm;

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

margins pinnate.

margins usually entire, rarely pinnate.

petals white, 47–75 × 13–22.7 mm, apex acute to attenuate, glabrous abaxially;

stamens white to yellow, 5 outermost petaloid, filaments spatulate, strongly clawed, 48–75 × 12–23 mm, without anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 36–53 mm.

petals golden yellow, 8.3–13.6 × 2.6–4.8(–6.2) mm, apex acute, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments broadly spatulate, strongly clawed, 6–8(–9.1) × 2.3–4.4 mm, with anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 5–7.9 mm.

cylindric, 30–43 × 12–17 mm, base tapering, not longitudinally ridged.

cup-shaped, 4–7.3 × 3.3–5.8 mm, base rounded, not longitudinally ridged.

2.3–4 mm;

coat anticlinal cell walls straight, papillae 4–10 per cell.

coat anticlinal cell walls straight, papillae 4–5 per cell.

= 22.