Flora of North America species comparison

solitary, erect, straight;

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

blade 26–74 × 6–19.2 mm, widest intersinus distance 4.5–11.4 mm;

proximal obovate, oblanceolate, or lanceolate, margins serrate, teeth 8–14, slightly antrorse, 0.6–4.5 mm;

distal elliptic to lanceolate, base not clasping, margins serrate, teeth 6–12, slightly antrorse, 1.3–4.1 mm;

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

persisting;

petiole present or absent;

blade elliptic to linear, margins usually dentate, sinuses extending less than 1/4 to midvein, or entire, rarely deeply lobed.

petiole present or absent (proximal leaves), absent (distal leaves);

blade elliptic to linear (proximal leaves), orbiculate to linear (distal leaves), to 10 cm, margins usually dentate, sinuses extending less than 1/4 to midvein, or entire, rarely deeply lobed.

green, orbiculate to ovate, 2.1–6.5 × 1.1–3 mm, width 1/3–7/8 length, not concealing capsule, margins 3-lobed or entire.

margins entire.

sepals 1–3.5 mm;

petals usually yellow, rarely orange, proximally, yellow distally, 2–6(–8) mm, apex rounded;

stamens 20–40, 2–4.5 mm, filaments monomorphic, filiform, unlobed;

styles 2–3.5(–5) mm.

petals golden yellow, (6.1–)7.3–10 × 1.6–3 mm, apex acute, glabrous abaxially;

stamens golden yellow, 5 outermost not petaloid, filaments linear to narrowly spatulate, not clawed, 4–8 × 0.7–1.5 mm, with anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 3.7–7 mm.

narrow-cylindric, 7–30 × 1–2.5 mm, axillary curved to 30° at maturity, usually inconspicuously longitudinally ribbed.

cup-shaped to cylindric, 10.4–16 × 6.6–9 mm, base tapering or rounded, not longitudinally ridged.

10–20, in 1 row distal to mid fruit, tan, dark-mottled or not, triangular prisms, surface ± smooth under 10x magnification; recurved flap over hilum absent;

seed coat cell outer periclinal wall flat.

coat anticlinal cell walls straight, papillae 6–16 per cell.

= 18, 36, 72.

= 22.