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 or decumbent, zigzag;

branches along entire stem, all ± equal, antrorse, 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 16–31 × 3.9–9.2 mm, widest intersinus distance 3–-8.3 mm;

proximal oblanceolate to elliptic, margins entire or dentate, teeth 0–4(–6), perpendicular to leaf axis, 0.2–1.3 mm;

distal oblanceolate to elliptic, base not clasping, margins entire or dentate, teeth 0–4, perpendicular to leaf axis, 0.4–2 mm;

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

margins pinnate.

margins entire.

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 white, 9–15 × 1.8–2.4 mm, apex rounded to acute, glabrous abaxially;

stamens white, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 7.1–13 × 0.5–1.4 mm, with anthers, second whorl with anthers;

anthers twisted or straight after dehiscence, epidermis papillate;

styles 4.8–-7.3 mm.

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

cup-shaped, 4.5–8(–13) × 4.5–7 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 usually 6–9 per cell.

= 22.