龙州唇柱苣苔 long zhou chun zhu ju tai

Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole 4-6 cm X 5-8 mm; leaf blade elliptic to ovate, 8-18 X 4.5-10 cm, herbaceous, sparsely appressed puberulent, more densely so on margin and veins, eglandular, base oblique, broadly cuneate to rounded, margin dentate or denticulate to serrate, apex acute; lateral veins 4 or 5 on each side of midrib, inconspicuous. Cymes 5-7-flowered; peduncle 14-19 cm, puberulent; bracts 2, free, ovate, 2.5-3.8 X 2.2-2.8 cm, puberulent, margin denticulate, apex acute. Pedicel 6-11 mm, densely glandular puberulent. Calyx 5-sect from base; segments equal, lanceolate, 7-8.5 X 1.2-2 mm, outside puberulent apically, inside densely puberulent and glandular puberulent, margin entire, apex acute. Corolla ca. 4.8 cm [color unknown, probably purple], outside sparsely puberulent and glandular puberulent, inside puberulent below adaxial lip and stamens; tube funnelform, ca. 3 X 1.4 cm; adaxial lip ca. 7 mm; abaxial lip ca. 1.6 cm. Filaments ca. 1.1 cm, sparsely glandular puberulent; anthers fused by entire adaxial surfaces, ca. 4.5 mm, puberulent; staminodes 3, central ca. 1 mm, laterals 4-9 mm. Pistil ca. 3 cm, densely puberulent; ovary ca. 1.4 cm. Stigma cuneate, ca. 3.5 mm, 2-lobed. Immature capsule, ca. 3 cm. Fl. Apr-May.

* Rocks in forested valleys among limestone hills. SW Guangxi (Longzhou Xian).

After publication of the family treatment for the Flora of China, this was treated as Primulina lungzhouensis (W. T. Wang) Mich. Möller & A. Weber (Taxon 60: 783. 2011).