Clustered frasera or green-gentian

Swertia fastigiata Pursh, Fl. Amer. Sept. 1: 101. 1813

Herbs monocarpic, 3–14 dm, glabrous. Stems 1. Leaf blades not white-margined; basal spatulate-obovate, 15–60 (including proximal petiolar portions) × 3–17 cm; proximal cauline leaves whorled, distal often opposite, blades widely elliptic to ovate, apex obtuse to acute (proximal) to acuminate (distal). Inflorescences dense, sometimes interrupted proximally. Flowers: calyx 4.4–13 mm; corolla light to medium blue or violet-blue with darker veins, often spotted, 6.7–13.4 mm, lobes elliptic-ovate, apex short-acuminate; androecial corona a sparse fringe of hairs to 5 mm, occasionally absent; style short, ± stout and indistinctly differentiated from summit of ovary; nectaries and foveae 1 per corolla lobe, foveae round or nearly so, opening directly adaxial to nectary, without a differentiated area on the corolla surface, rim raised, with long, incurved fringes all around.

Flowering late spring–summer. Mountain meadows, open woods; 1600–2000 m; Idaho, Wash.