Flora of North America species comparison

solitary, erect, straight;

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

solitary, erect, straight;

branches mostly distal, proximal longer than distal, all usually extending to near the distal end of plant, antrorse, straight; 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 22–115 × 2.8–10.9(–17.2) mm, widest intersinus distance 2.2–7(–9) mm;

proximal oblanceolate, elliptic, or lanceolate, margins dentate, teeth 10–24(–38), perpendicular to leaf axis, 0.5–4 mm;

distal elliptic to lanceolate, base not clasping, margins dentate, teeth 8–20, perpendicular to leaf axis, 0.3–5.6 mm;

abaxial surface with simple grappling-hook, complex grappling-hook, and usually with needlelike trichomes, adaxial surface with simple grappling-hook and 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, 8–14.4 × 2.1–3.9 mm, apex acute, hairy abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 5.5–11.1 × 1.2–2.9 mm, with anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis papillate;

styles 5.3–10 mm.

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

cylindric, 7–14.6 × 3.5–6.7 mm, base tapering, not longitudinally ridged.

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

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

= 22.

= 20.