Flora of North America species comparison

erect, usually simple, 30–150 cm, with short, dense, eglandular pubescence, sparsely so toward base.

several, erect, not much-branched, slender, 15–60 cm, flowering above middle.

sessile, 2 per node;

blade prominently 3–5-veined, ovate-acuminate, round at base, (4–)6–10(–13) cm × (20–)30–50(–90) mm, appressed-pubescent on both surfaces.

cauline in 2–4 pairs, gradually reduced distally, blade linear with broadened base, 1–8 cm × 1–2 mm, apex acute;

basal leaves tending to wither by flowering time, blade with midrib present, linear-oblanceolate, 5–12 cm × 1–4 mm, apex acute.

paniculate, narrow, many-flowered, open, bracteate, pedunculate, 10–50 × 3–5 cm, densely puberulent;

bracts narrowly lanceolate, 3–15 mm, apex acuminate;

peduncle ascending.

few-flowered, bracteate, narrow, flowers terminal and axillary;

bracts linear, 2–10 mm.

ascending, recurved near apex, ca. equaling calyx.

ascending, straight, slender, very short in bud but equaling or exceeding flower at anthesis.

nocturnal;

calyx prominently 10-veined, tubular to narrowly campanulate and 6–9 × 3–4 mm in flower, turbinate and 10–12 × 4–5 mm in fruit, narrowed proximally around carpophore, veins parallel, green, broad, with pale commissures, puberulent, sometimes with few glands, lobes triangular-acute, 2–3 mm;

corolla white, clawed, claw equaling calyx, broadened into limb, limb obtriangular, deeply lobed, 7–9 mm, lobes ca. 8, linear, appendages minute;

stamens slightly longer than corolla;

styles 3, ca. 2 times as long as corolla.

calyx 10-veined, campanulate, lobed to middle or below, 6–10 mm;

lobes 6, recurved, 1–3-veined, lanceolate to linear-lanceolate, margins membranous, ciliate, apex acute;

petals white to pale greenish, lobed, clawed, 12–20 mm including claw, ca. 2 times length of calyx;

lobes 4, small, 1.5–2 mm, claw woolly towards base, appendages absent;

stamens equaling petals;

filaments pubescent at base;

styles 3, shorter than to equaling stamens.

narrowly ovoid, slightly longer than calyx, opening by 3 (splitting into 6) ascending teeth;

carpophore 2–2.5 mm.

ovoid, exceeding calyx, dehiscing with 6 spreading teeth;

carpophore 1–2 mm.

dark brown, reniform, 0.8–1.5 mm, shallowly tuberculate.

brown, broadly reniform, less than 1.75 mm, margins coarsely tuberculate to papillate, with concentric rings of tubercles on both faces.

= 48.

= 48.