十字唇柱苣苔 shi zi chun zhu ju tai

Didymocarpus cruciformis W. Y. Chun, Sunyatsenia 6: 296. 1946.

Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole 5-10 X 4-10 mm; leaf blade ovate to orbicular-ovate, 5-8 X 4-7 cm, papery, densely appressed puberulent and appressed pilose (hairs to 1 mm and to 3 mm), eglandular, base broadly cuneate, margin subentire to repand-crenate, apex acute to rounded; lateral veins ca. 4 on each side of midrib, inconspicuous. Cymes ca. 2-flowered; peduncle 4-6 cm, spreading pilose; bracts 2, seldom 3, free, linear-lanceolate to narrowly triangular, 4-9 X 1-2 mm, densely puberulent and pilose, margin entire, apex acute. Pedicel 1-2.3 cm, densely glandular puberulent and pilose. Calyx 5-sect from base; segments equal, linear-lanceolate, 5-7 X 0.8-1 mm, outside puberulent, inside glabrous, margin entire, apex subulate-acuminate. Corolla purple, 3.5-4 cm, outside sparsely pubescent, inside puberulent on 2 longitudinal lines; tube narrowly funnelform, ca. 2.2 X 1 cm; adaxial lip ca. 8 mm; abaxial lip ca. 1.5 cm. Filaments ca. 8 mm, glabrous; anthers fused by entire adaxial surfaces, 3-4 mm, pilose; staminode 1, ca. 4 mm. Pistil ca. 2.5 cm, puberulent; ovary ca. 2 cm. Stigma cuneate, ca. 2 mm, 2-lobed. Fruit and seeds unknown.

* Hunan (Hengyang Xian).

Only known from the type specimen.

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