Flora of North America species comparison

pink, freely branching, producing extensive clumps, 2–3 cm diam., with fibrous remains of old leaves;

roots fleshy.

many-branched, forming tufts, with fibrous remains of old leaves at nodes, slender, 0.6–0.8 cm diam.;

roots few, fibrous.

usually 1-branched, solid, 7–15 dm.

simple, solid, almost absent or to 2.5 dm.

basal deciduous, at first erect, then recurved, blade dark green, with prominent median thickening, 4–10 dm × 2–3 cm, slightly glaucous basally;

cauline equaling inflorescence unit.

basal longer than stem, blade light green, finely veined, narrowly linear, 3–4 dm × 0.4–0.6 cm, glaucous, margins not thickened, apex acute;

cauline 1–2, spreading, sheathing for about 1/2 length, foliaceous, blade not inflated, 0.7–1 dm.

4–12-flowered;

spathes green with brown margins, outer spathe strongly keeled, inner without keel, 6–9 cm, subequal, margins not scarious.

(1–)2-flowered;

spathes nearly opposite, connivent, linear-lanceolate, 4–9.5 cm × 4–6 mm, subequal or outer longer.

perianth bright yellow;

floral tube 0.6–0.8 cm, with no constriction into ovary;

sepals bright yellow or cream colored, lanceolate to ovate or suborbiculate, 5–7.5 × 3–4 cm, base abruptly attenuate, claw ca. 1/2 length of limb, signal a darker yellow basal patch limited by short, brown lines;

petals without veining, lanceolate to spatulate, 2–3 cm;

ovary triangular in cross section with concave sides and narrow groove at each angle, 1.5 cm;

style keeled, 3–4 cm, crests spreading, 1–1.2 cm, laciniate at apex;

stigmas rounded with prominent tongue;

pedicel 2.5–7 cm.

perianth indigo, purple, lavender, white, cream, or yellow;

floral tube linear, gradually dilating apically, 6 cm;

sepals usually with fine, dark veins basally, becoming coarser on claw, oblanceolate or obovate, 3.9–7 × 2 cm, base abruptly attenuate into claw;

petals oblanceolate, 3.5–6 × 0.5–1.6 cm, base gradually attenuate;

ovary ovoid, ca. 1 cm;

style 2–3.5 cm, crests overlapping, reflexed, semiovate, 0.8–1.8 cm, margins denticulate;

stigmas triangular, margins entire;

pedicel 1.5–2 cm.

prismatic to oblong-ovoid, obscurely 3-angled with obvious groove at each angle, 3.5–6 cm, beak 5 mm.

oblong to ovoid, somewhat 3-angled in cross section, 2.5–3 cm.

D-shaped, flattened, 6–7 mm, corky, lustrous.

dark brown, angular, finely wrinkled.

= 34.

= 40.