Flora of North America species comparison

1–few, with several rosettes.

1–several.

blades narrowly white-margined;

basal oblanceolate, 4–23 × 0.3–1.2(–2) cm, basal leaves generally longer than lowest internode;

cauline leaves opposite, proximal blades oblanceolate to oblong, distal linear-oblong.

blades narrowly white-margined;

basal oblanceolate or narrowly obovate to elliptic-oblong, 2–12 × 0.6–2.2 cm;

cauline leaves opposite or rarely some whorled, distal blades oblong to lanceolate.

narrow, 1.5–4(–5) cm wide, interrupted proximally, ± continuous distally.

diffuse, branching near base of main stem.

calyx 3–7(–12) mm;

corolla greenish white to pale or medium blue, usually dark blue- to purple-dotted and/or with a dark blue, purple, or green central stripe (except in var. idahoensis), 6–12 mm, lobes oblong-obovate-elliptic, widest near midlength, abruptly tapering to acute to short-acuminate apex;

androecial corona scales present, variable among the varieties;

style slender, distinct;

nectaries and foveae 1 per corolla lobe, foveae distal to nectary, opening into an elliptic-oblong to lance-ovate differentiated area on the corolla surface, rim fringed all around but with fringes shorter distally, or not fringed toward distal end.

calyx 5–12 mm;

corolla greenish white, copiously blue-purple-dotted, 7–13 mm, lobes oblong-obovate, apex abruptly acuminate;

androecial corona poorly developed, ± fringed;

style slender, distinct;

nectaries 2 per corolla lobe in a single, basally 2-lobed fovea, fovea opening distal to nectaries, into a single differentiated area on the corolla surface that is oblong to elliptic, ± widened at distal end, proximal side of rim prolonged into a scale 2 mm, fringed ± 1/2 its length, distal side of rim long-fringed.