Rosulate perennial. Leaves narrowly obovate, 250-350(-500) x 45-60(-100) mm, lamina decurrent, densely pubescent, lower lamina densely glandular pubescent with few short-and numerous long-stalked glands, margins crenate, petiole 0-40 mm long. Inflorescences up to 20-flowered, peduncle up to 250 mm tall, glandular-pilose. Sepals linear-lanceolate, 3(-7) x 1 mm, pilose, tips red-brown. Corolla 50-65 mm long, funnel-shaped, tube 40-55 mm long, narrow below, dilated in middle and straight to the mouth, 15 x 20 mm at mouth, white, yellow on the inside in the lower, ventral third, with elongate glandular trichomes, outside glandular-pubescent, inside very sparsely set with short-stalked glands, roof with eglandular trichomes at mouth of tube; limb weakly bilabiate, pale mauve, lobes oblong, 14-17 x 10 mm, spreading, lower three lobes with 7 (2+3+2) bold lines, extending just onto the limb. Stamens 10-12 mm long; filaments pale purple, glabrous basally, sparsely glandular distally; anthers 3.5 x 1.5 mm, purple; posterior staminode minute, lateral staminodes ca. 2 mm long. Pollen prolate, 20 x 12 um, tricolpate, exine microreticulate and minutely scabrate. Ovary ca. 15 mm long, with dense, appressed, filiform trichomes, disc orange; style deflexed toward stigma, 5 mm long, dorsiventrally compressed, with stalked glandular trichomes distally; stigma dark purple, stomatomorphic, bilabiate, suborbicular, papillate. Capsule 90-110 x 2.5 mm.
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