 |
| Primulina titan Z.B. Xin, W.C. Chou & F. Wen, in Xin, Fu, Huang, Chou, Huang et Wen, 2020. |
Abstract
A new species of Gesneriaceae, Primulina titan, is described and photographed from northern Guangxi, China. It resembles P. hunanensis, but can be distinguished by combined morphological characters of leaf, bract, corolla, stamen and pistil. We found only one population with approx. 800 mature individuals at the type locality. This species is provisionally assessed as vulnerable [VU D1] using IUCN criteria.
Keywords: Flora of Guangxi, Limestone flora, Lithophytic, New taxon, Taxonomy
 |
| Primulina titan Z.B. Xin, W.C. Chou & F. Wen, A: Habitat. B: Habit with flowers. C: Leaf and the axillary cyme. D: Cyme. E: Bracts. F: Lateral view of the corolla. G: Top view of the corolla. H: Front view of the corolla. I: Pistil and Calyx. J: Calyx lobes. K: Opened corolla (Photographed by Z.B. Xin) |
Primulina titan Z.B. Xin, W.C. Chou & F. Wen, sp. nov.
Diagnosis: Primulina titan differs from P. hunanensis by its leaf blade glabrous (vs. covered with straight, pointed, white trichomes), petiole 1.2-2.5 cm in diam. (vs. 0.4-1.0 cm); bract pale green inside, margin obviously numerous serrate, sparsely pubescent outside, glabrous inside (vs. pink or purple-red inside, margin entire or repand, densely trichomes and pubescent outside, sparsely trichomes and pubescent inside); corolla white outside, with red-purple and brown stripes and spots inside ( vs. purple, with white stripes at corolla mouth); filament yellow, 1.5-1.7 cm long(vs. white, 0.8-1.2 cm); anther 7-8 mm long (vs. 3.5-4.5mm); pistil pale green, 4.2-5.0 cm long (vs. pale pink, 2.6-3.8 cm).
Zibing Xin, Longfei Fu, Zhangjie Huang, Wei-Chuen Chou, Yi Huang and Fang Wen. 2020. Primulina titan (Gesneriaceae), A New Species from Limestone Areas in Guangxi, China. Journal of Botanical Research. 2(3); 1–5. DOI: 10.30564/jrb.v2i3.1994