Primulina fengkaiensis (Gesneriaceae), a new species from limestone areas in Western Guangdong, China Ning, Zu-Lin Pan, Bo Kang, Ming Phytotaxa 2015 2015-02-19 197 4 296 300 4MDNW Z. L. Ning & M. Kang Z. L. Ning & M. Kang 2015 [136,706,172,199] Magnoliopsida Gesneriaceae Primulina Plantae Lamiales 1 297 Tracheophyta species fengkaiensis sp. nov.   Type:—  CHINA. Guangdong: Zhaoqing City, Fengkai, 23.63°N, 111.86°E, elevation ca.  180 m, on limestone rock face in a Karst area;   15 Dec. 2011, Ming Kang et al GDFK06( holotype: IBSC!).   FIGURE 1.  Primulina fengkaiensis. A.Habit. B.Flower side view. C.Flower face view. D.Corolla opened showing stamens and staminodes. E, F.Stamens. G.Pistil. Drawn by Yun-Xiao Liu, based on the holotype. Perennial herbs.Rhizome subterete, 4–6 cmlong, 2–3 cmin diameter.Leaves opposite, 15–30. Petiole 2–6 cmlong, 0.6– 1.5 cmwide, appressed pubescent; Leaf blade elliptic to elliptic–lanceolate, asymmetric, 10–21 × 4–8 cm, herbaceous, apex acute, base broadly cuneate, decurrent, margin serrate, adaxially pubescent, abaxially appressed pubescent; lateral veins 5–7 on each side of the midrib, impressed adaxially and prominent abaxially. Cymes 3–12, 1–2–branched, 3–9–flowered; peduncle 8–15 (–22) cm long, pubescent; bracts 2, opposite, lanceolate, 0.8–1.5 × 0.4–0.5 cm, margin entire or 2–5 inconspicuous crenulate, apex acute, pubescent. Pedicel 2.2–4 cmlong, pubescent. Calyx 5–lobed nearly to the base, lanceolate or linear–lanceolate, 0.8–1.5 × 0.2–0.3 cm, margin entire or 2–3 inconspicuous crenulate, pubescent. Corolla pale purple, with purple marks and purple stripes inside, 5–6.5 cmlong, pubescent outside, sparsely puberulent in purple marks and adnate position of stamen and staminodes inside; tube narrowly funnelform, 3–3.8cmlong, orifice 1.8–2 cmin diameter; adaxial lip 2–lobed to base, lobes broadly ovate or suborbicular, 1.3–1.8 × 1.5–2 cm, apex truncate or retuse; abaxial lip 3–lobed, 1/6 to 2/7of total corolla length, lobes obovate, 2–2.4 × 1.8–2 cm, apex truncate or retuse. Fertile stamens 2, adnate to 1.2–1.5 cmabove the base of the corolla tube, filaments geniculate near the middle, 1.2–1.5 cmlong, glabrous, anthers ca. 5 mmlong, densely barbate on back side. Staminodes 2, 5–8 mmlong, sparsely glandular pubescent, slightly enlarged at apex, adnate to 0.8–1.2 cmabove the base of the corolla tube. Disc annular, ca. 1.5 mmhigh, glabrous, margin repand. Pistil 3–3.8 cmlong; ovary slightly falcate, ca. 2 cmlong, ca. 3 mmin diameter, densely villous; style 1–1.2 cmlong, densely pubescent; stigma 4–5 mmlong, 2–lobed, lobes ovate. Capsule straight, linear, ca. 5.5 cmlong, 3–4 mmin diameter, densely villous. Seeds elliptic, ca. 0.5 mmlong.   Distribution and habitat:—  Primulina fengkaiensisis currently known from a few local populations in a narrow limestone area in Fengkai County and Huaiji County, Zhaoqing City, Guangdong, China. During field surveys in Fengkai County, we found that it is locally abundant and grows mainly on moist rock faces. It is easy to breed. We introduced some individuals from the field population into cultivation in the South ChinaBotanical Garden, Guangzhou, Chinain 2011. Now they have been blooming into colonies.  Phenology:—Flowering occurs in Mar.–May., and fruiting occurs in May–Jun.  Relationships:—  Primulina fengkaiensisis similar to  P. baishouensis(Y.G. Wei, H.Q. Wen & S.H. Zhou) Y.Z. Wangand  P. gueilinensis(W.T. Wang) Y.Z. Wang, but differs by leaf blades being elliptic to elliptic–lanceolate, 10–21 × 4–8 cm, margin with serrate, leaf blade adaxially sparsely pubescent, petiole 0.8–1.5 cmwide, pedicel 2.2–4 (–7.5) cm long, cymes 3–5–flowered, stigma 4–5 mmlong, lobes ovate. A detailed morphological comparison of the three species is shown in Table 1.   Etymology:—The specific epithet is derived from the name of the typelocality, Fengkai County, Guangdong Province, China. 4927611301 [219,1418,248,269] China Zhaoqing City 180 23.63 Karst area 752 111.86 Fengkai 1 297 1 Guangdong 4927611302 2011-12-15 IBSC China 1 297 GDFK06 1 holotype