Flora of North America species comparison

usually secund racemes, rarely solitary flowers, 5–32 cm;

axis yellowish to orange or reddish.

solitary flowers, 5–30 cm;

axis white.

nodding at anthesis, erect in fruit, finely hairy or glabrous, sometimes glandular-hairy.

nodding at anthesis, erect in fruit.

sepals absent or 4–5, not similar to subtending bracts, spatulate to elliptic, 7–12 × 1–5 mm;

petals 4–5, yellowish to orange or reddish, oblong, 8–17 × 4–8 mm, base narrowly saccate, margins ciliate to erose, apex acute to rounded, adaxial surfaces often hairy;

nectary lobes 8–10, (paired), stout, not elongate or curved-cylindric;

stamens 8–10;

filaments sparsely hairy;

anthers horizontal at anthesis, horseshoe-shaped, sacs of equal size;

ovary 4–8 × 3–6 mm, usually hairy;

style 2–10 × 1–2 mm, sparsely hairy;

stigma umbilicate, 1.5–3 mm diam., often subtended by ring of crowded hairs.

sepals (3–)5(–6), similar to subtending bracts, lanceolate to oblong, 7–10 × 4–6 mm;

petals (3–)5(–6), white to pinkish or reddish, obovate, 10–20 × 5–15 mm, base slightly saccate, margins entire, apex rounded or, rarely, slightly lacerate, adaxial surfaces with scattered hairs;

nectary lobes 10, elongate, curved-cylindric;

stamens 8–14;

filaments glabrous or sparsely hairy;

anthers horizontal at anthesis, transversely ellipsoid to depressed-ovoid, abaxial pair of sacs smaller;

ovary 6–12 × 5–9 mm, glabrous or sparsely hairy;

style 2–7 × 2–5 mm, glabrous or sparsely hairy;

stigma broadly funnelform, 2–6 mm diam., not subtended by ring of crowded hairs.

4–5-segmented;

segments often deciduous after seed dispersal, thin, 6–10 × 4–8 mm, without connecting, pinnate, vascular bundles when open.

5-segmented;

segments persistent after seed dispersal, stout, 7–11 × 5–12 mm, often connected along margins by fine, pinnate, vascular strands.

0.5–1 mm, mostly membranously winged.

0.5–1 mm, mostly membranously winged.

= 48.

= 32, 48.