Flora of North America species comparison

usually 1.

1–few from each division of the caudex, often with several rosettes.

blades white-margined;

basal linear-lanceolate to narrowly oblanceolate, 5–20 × 0.7–2(–3) cm;

cauline leaves opposite, distal blades lanceolate.

blades white-margined, basal 3–8 × 0.1–0.3 cm, narrowly linear;

cauline leaves opposite, blades similar to basal.

diffuse.

narrow but not dense, few-flowered.

calyx 3–6 mm;

corolla greenish white to greenish yellow, dark green- or purple-dotted, 7–12 mm, lobes elliptic-ovate, apex abruptly acuminate;

androecial corona ± fringed;

style slender, distinct;

nectaries 2 per lobe, in closely paired, ± separate foveae, foveae opening distal to nectaries, into a single widely ovate-triangular differentiated area on the corolla surface shaped ± like the spade on playing cards, rim ± sparsely short- to long-fringed.

calyx 3–4 mm;

corolla cream, dark purple-dotted, 5–9 mm, lobes lanceolate, apex acute to short-acuminate;

androecial corona scales oblong, ca. 2 mm, margins subentire to ± lacerate;

style slender, distinct;

nectaries and foveae 1 per corolla lobe, foveae opening ± round, distal to nectaries but without a differentiated area on the corolla surface, rim deeply, evenly fringed all around.