粗筒唇柱苣苔 cu tong chun zhu ju tai

Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole to 2.5 cm X 7 mm; leaf blade orbicular-ovate to nearly orbicular, to 4.8 X 5.8 cm, thin papery, puberulent, eglandular, base broadly cuneate, margin obtusely dentate to undulate, apex rounded to obtuse; lateral veins ca. 3 on each side of midrib, inconspicuous. Cymes 1-3-flowered; peduncle ca. 4.5 cm, puberulent; bracts 2, free, ovate-triangular, ca. 4 X 1.6-1.8 mm, puberulent, margin entire, apex obtuse. Pedicel ca. 2 cm, villous. Calyx 5-sect from base; segments equal, lanceolate-linear, ca. 7 X 1.3 mm, outside puberulent, inside glabrous, margin entire, apex acute to obtuse. Corolla red, ca. 4.5 cm, outside sparsely puberulent, inside puberulent below adaxial lip; tube broadly tubular, ca. 3 X 1.8 cm; adaxial lip ca. 1 cm; abaxial lip ca. 1.6 cm. Filaments ca. 8.5 mm, glandular puberulent above; anthers fused by entire adaxial surfaces, ca. 4 mm, puberulent; staminodes 3, central ca. 7 mm, laterals ca. 1.4 cm. Pistil ca. 2.7 cm, puberulent; ovary ca. 1.4 cm. Stigma obtriangular, ca. 3 mm, 2-parted. Capsule erect, ca. 6 cm. Fl. Apr, fr. Jun.

* Dense slope forests; ca. 900 m. S Hunan (Shuangpai Xian).

After publication of the family treatment for the Flora of China, this was treated as Primulina crassituba (W. T. Wang) Mich. Möller & A. Weber (Taxon 60: 781. 2011).