Flora of North America species comparison

1–few, with several rosettes.

1–several, with several rosettes, puberulent.

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, glabrous or abaxial surfaces puberulent proximally;

basal narrowly oblanceolate, 1.4–14 × 0.2–0.7 cm, basal leaves usually shorter than lowest internode;

cauline leaves opposite, distal blades nearly linear.

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

narrow, 1.5–4 cm wide, ± continuous throughout or interrupted proximally.

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 4–8 mm;

corolla white or slightly suffused with blue, dark blue-dotted, abaxially with a green central stripe, 6–9 mm, lobes proximally oblong, distally triangular, apex acuminate;

corona scales deeply cleft into distally threadlike segments, 2 mm;

style slender, distinct;

nectaries and foveae 1 per lobe, fovea narrowly oblong, opening into an oblong differentiated area on the corolla surface, rim fringed all around but fringes shorter distally.