Flora of North America species comparison

generally 1, with 0–few rosettes.

blades white-margined;

basal oblanceolate, 2–9 × 0.3–1(–1.5) cm, apex abruptly pointed;

cauline leaves whorled, distal blades linear-oblong.

elongate, dense, branching near base of main stem, nearly continuous distally.

calyx 6–11 mm;

corolla white to pale blue, veins darker, campanulate, 8–13 mm, lobes elliptic-oblong to obovate, apex short-acuminate;

androecial corona scales narrowly oblong, 2–3 mm, margins fringed;

style slender, distinct;

nectaries and foveae 1 per corolla lobe, foveae round at base, opening directly adaxial to nectary, without a differentiated area on the corolla surface, rim prolonged into an appendage ca. 3 mm, proximally tubular, dividing distally into 2 oblong, fringed lobes.