Flora of North America species comparison

1–3.5 × 0.05–0.4 cm, fascicles of small leaves 0.2–1.5 cm usually present in axils;

blade narrowly lanceolate, sometimes linear, base attenuate, margins entire or shallowly and sparsely serrulate, sometimes undulate.

0.6–4 × 0.15–1.2 cm, fascicles of small leaves often absent or much reduced, sometimes to 1.5 cm;

blade very narrowly elliptic or narrowly lanceolate to ovate, base truncate or subcordate and clasping, rarely nearly clasping, margins entire or sparsely serrulate, rarely crinkled-undulate.

buds with free tips (1–)2–6 mm;

floral tube (18–)30–50(–60) mm;

sepals 8–20 mm;

petals 13–30 mm;

filaments 5–10 mm, anthers 5–9 mm;

style 30–65(–75) mm.

buds with free tips 0.5–3 mm;

floral tube 20–50 mm;

sepals 9–26 mm;

petals 12–35 mm;

filaments 5–12 mm, anthers 4–13 mm;

style 25–70 mm.

= 14, 28.

= 14, 28.