Flora of North America species comparison

solitary (or multiple as wound response), erect, straight;

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

multiple, erect, straight;

branches along entire stem, all ± equal, antrorse, upcurved; hairy.

blade 37–120 × 5–24.4 mm, widest intersinus distance 4.8–19.6 mm;

proximal oblanceolate to elliptic, margins serrate, teeth 14–30, slightly antrorse, 0.6–4.9 mm;

distal elliptic to lanceolate, base not clasping, margins serrate, teeth 12–30, slightly antrorse, 0.7–4.7 mm;

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

blade 19–47.5 × 5.8–9.1 mm, widest intersinus distance 4.6–7.1 mm;

proximal oblanceolate to elliptic, margins dentate, teeth 6–20, perpendicular to leaf axis, 0.5–1.9 mm;

distal lanceolate, deltate, or cordate, base clasping, margins entire or dentate, teeth 0–6, perpendicular to leaf axis, 0.4–1.4 mm;

abaxial surface with complex grappling-hook trichomes, adaxial surface with complex grappling-hook and needlelike trichomes, both surfaces green, moderately hairy.

margins pinnate.

margins entire.

petals white, 22.6–49 × 3.6–10.3 mm, apex acute, glabrous abaxially, stamens white, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 20–47 × 3–10.2 mm, without anthers, second whorl without anthers;

anthers straight after dehiscence, epidermis smooth;

styles 11.5–18.5 mm.

petals golden yellow, 7.7–10.8 × 1.8–4.8 mm, apex rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 7–7.3 × 1.2–2 mm, with anthers, second whorl with anthers;

anthers twisted after dehiscence, epidermis smooth;

styles 5.8–8 mm.

cylindric, 14.5–29 × 6.9–12.3 mm, base tapering or rounded, not longitudinally ridged.

cup-shaped, 4–6.6 × 4–7.4 mm, base rounded, not longitudinally ridged.

coat anticlinal cell walls wavy, papillae 4–8 per cell.

coat anticlinal cell walls straight, papillae 15–46 per cell.

= 20.