Flora of North America species comparison

persisting;

petiole present or absent;

blade lanceolate to linear, margins usually deeply to shallowly lobed, rarely entire.

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 absent;

blade ovate-lanceolate to linear, to 15 cm, margins deeply to shallowly lobed or entire.

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, lanceolate, 4.5–8.3 × 1.2–3.6 mm, width 1/5–1/2 length, not concealing capsule, margins entire.

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.

sepals 3–8 mm;

petals yellow to orange proximally, yellow distally, (7–)8–18 mm, apex rounded or acute apex;

stamens 20+, 3–8 mm, filaments monomorphic, filiform, unlobed;

styles 4–8 mm.

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.

clavate, 13–26 × 2–3.5 mm, axillary curved to 180° at maturity, usually inconspicuously longitudinally ribbed.

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

15–40, in 2+ rows distal to mid fruit, tan, usually dark-mottled, usually irregularly polygonal, occasionally triangular prisms proximal to mid fruit, surface colliculate under 10x magnification; recurved flap over hilum usually present;

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

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.

= 18.

= 18, 36, 72.