Caudices to 5 dm × 1-4 cm, clumps to 5+ dm diam. Leaves with resinous odor; rosette 15-50-leaved, 10-20 cm diam.; blade light to dark or yellowish green, linear-deltate, tapering from base, convex or obtusely angled abaxially, laminar and flat or convex adaxially, often terete near apex, 6-15 × 0.5-1.5 cm, 2-5 mm thick, 2-6 times wider than thick, base 1-2 cm wide, surfaces not farinose, viscid, appearing oily. Inflorescences: cyme 3-15-branched, flat to cylindric, (to 3 × 1.5 dm); branches (close set), 1-2 times bifurcate; cincinni 3-11-flowered, scarcely circinate, 2-7 cm; floral shoots 2-7 dm × 2-10 mm; leaves 20-40, ascending, triangular-lanceolate, 1-6 × 0.3-0.5 cm. Pedicels 1-4 mm. Flowers: petals widespreading from middle or slightly reflexed, connate 1-2 mm, white to pink, elliptic, 6-10 × 2.5-3.5 mm, apex acute, corolla 12-22 mm diam.; pistils suberect or ascending, (pink, slender), 6-10 mm; styles 2.4-4 mm. Follicles ascending, with adaxial margins ca. 45-60º above horizontal. 2n = 34.
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