Flora of North America species comparison

multiple, erect, zigzag or straight;

branches along entire stem, distal longest, antrorse, straight to upcurved;

glabrescent, smooth to touch.

blade 16–84 × 2.2–10.6 mm, widest intersinus distance 2.2–7 mm;

proximal oblanceolate, margins usually entire, occasionally dentate, teeth 0–6(–14), perpendicular to leaf axis, 1–2 mm;

distal elliptic, lanceolate, or linear, base not clasping, margins usually entire, rarely dentate, teeth 0(–6), perpendicular to leaf axis, 0.6–2 mm;

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

not persisting.

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

blade ovate to linear (proximal leaves), ovate to lanceolate (distal leaves), to 6 cm, margins entire.

margins entire.

green, elliptic to oblanceolate, 3.3–6.2 × 1.5–3.2 mm, width 1/4–7/8 length, not concealing capsule, margins entire.

petals light to golden yellow, 7.8–11(–14.2) × 1.9–2.8(–4.2) mm, apex rounded, glabrous abaxially;

stamens white to light yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 5.9–9.2(–10.1) × 1.2–2.7 mm, with anthers, second whorl with anthers;

anthers twisted after dehiscence, epidermis smooth;

styles 5.2–7.6 mm.

sepals 1–3 mm;

petals yellow, 2–4 mm, apex retuse to rounded;

stamens 10–30, 2–3.5 mm, filaments monomorphic, filiform, unlobed;

styles 1.5–3 mm.

cup-shaped, 4.5–8.8 × 5.8–8.8 mm, base rounded, not longitudinally ridged.

cylindric or clavate, 5–16(–20) × 2–4 mm, axillary curved to 45° at maturity, often prominently longitudinally ribbed.

coat anticlinal cell walls straight, papillae 15–24 per cell.

10–25, in 2+ rows distal to mid fruit, tan, dark-mottled, irregularly polygonal, surface smooth to minutely tessellate under 10x magnification; recurved flap over hilum absent;

seed coat cell outer periclinal wall domed, domes on seed edges less than 1/2 as tall as wide at maturity.

= 22.

= 18.