Flora of North America species comparison

at proximal nodes.

decumbent to scandent.

diffusely branched.

blade narrowly lanceolate to lanceolate-oblong, lanceolate-elliptic or ovate, 1.5–14 × 0.5–3.3 cm, margins scabrous, apex acute to acuminate, glabrous.

blade narrowly lanceolate to ovate-elliptic, 5–12 × 1–4 cm, apex acute to acuminate.

distal cyme 1–several-flowered, usually exserted;

spathes solitary, bright green, without contrasting veins, pedunculate, usually distinctly falcate, (0.5–)0.8–4 × 0.4–1.2(–1.4) cm, margins distinct, glabrous or scabrous, sometimes also sparsely ciliate or ciliolate basally, apex usually acuminate, usually glabrous or nearly so;

peduncles 0.5–2(–4) cm.

distal cyme usually vestigial, included, sometimes 1-flowered, exserted;

spathes solitary, green, paler or whitish basally with contrasting, dark green veins, pedunculate, usually not falcate, 1.5–3(–3.5) × 0.8–1.3(–1.8) cm, margins distinct, scabrous, not ciliate, apex acute to acuminate, glabrous to puberulent;

peduncles 0.8–3.5(–5) cm.

bisexual and staminate;

petals all blue (rarely all lavender), proximal petal smaller;

medial stamen anther connective usually with transverse band of violet;

staminodes 2–3;

antherodes yellow, medial often absent or vestigial, cruciform.

bisexual (rarely staminate);

proximal petal paler or white, very reduced, distal petals blue to bluish purple;

staminodes 3;

antherodes yellow sometimes with central maroon spot, cruciform.

3-locular, 2-valved, 4–6.3 mm.

2-locular, 2-valved, 4.5–8 mm.

5 (or less through abortion), brown, 2–2.8(–3.2) × 1.4–1.8 mm, deeply reticulate.

4, brown, (2–)2.5–4.2 × 2.2–3 mm, rugose pitted-reticulate.