斜萼糙苏 xie e cao su

Stems 70-80 cm tall, subglabrous, shiny toward base, densely pilose toward apex. Leaves herbaceous; petiole 3.5-5 cm; upper stem leaf blades ovate, 10-14 × 6.5-9 cm, adaxially sparsely strigose, abaxially stellate pubescent, base shallowly cordate, margin coarsely serrate, apex caudate-acuminate. Verticillasters 3-5, many flowered; floral leaves similar to stem leaves, with petiole 5-10 mm, blade 1.5-7 × 1-4 cm; bracts linear, herbaceous, 4-7 mm, sparsely pilose, glandular puberulent. Calyx tubular, ca. 10 × 4.5 mm, sparsely pilose and glandular puberulent outside, splitting longitudinally; teeth circular, apex tufted hairy inside, spine ca. 1 mm. Corolla ca. 1.8 cm, tube ca. 1 cm, glabrous outside, gray pubescent on back near throat, pilose annulate inside; upper lip ca. 8 mm, gray pubescent outside, margin denticulate, bearded inside; lower lip ca. 6 × 8 mm, gray pubescent outside; middle lobe largest, obovate; lateral lobes ovate. Filaments hairy, posterior 2 with a hooked, reflexed basal appendage. Nutlets glabrous. Fl. Jul.

* Grassy slopes; ca. 2400 m. Sichuan.