No.2   BI-DAN LAI, BING-MOU WANG& FANG WEN

Primulina cordistigma, a new species of Gesneriaceae from Guangdong, China and supplementary and emendated description of floral morphology of P. yangchunensis

Phytotaxa 244(3): 283‒288.

ABSTRACT

Primulina cordistigma, a new species from Guangdong, China, is illustrated and described. This new species is similar   to P. yangchunensis, from which it is distinguished by the leaf blades broadly ovate, 4–5 × 2–3.5 cm, base broadly cuneate to cordate, and margins entire or rarely undulate; the inflorescence a cyme 1–5-flowered; the bracts lanceolate, 3–4 × 0.5–1.0 mm; the corolla tube 0.9–1 cm long; staminodes 3; and the stigma cordate with elliptic lobes covered by shortly puberulent hairs.Aconservationcategoryof“Endangered”(EN)accordingtoIUCNRedListCategoryandCriteriaisproposed.Based onplentyofspecimenswithflowersandfieldworks,thefloralmorphologyofP.yangchunensis,whichisthecongenerofP. cordistigma, is supplemented and emendatedhere.

FIGURE1Primulinacordistigmaillustration.A,habit;B,adaxialleafsurfaceandmagnifiedleafblademarginshowingciliatehairs;C, flower; D, cut-open corolla showing stamens and staminodes; E, pistil with and with calyx lobes removed; F, stigma; G, filaments with coherent anthers. Drawn by Bi-Dan Lai partly from the holotype (Fig.2).

FIGURE2Primulinacordistigma.A,habitat;B,clusterofplants;C,habit;D,leaves;E,frontalviewofflower;F,lateralviewofflower; G, cut-open corolla showing stamens and staminodes, H, anthers, I, stigma, J, pistil and pedicel. Photographed by Bi-Dan Lai & Bing- MouWang.

FIGURE3Primulinayangchunensis.A,habitat;B,leafblades;C,habitD,frontalviewofcorolla;E,lateralviewofcorolla.Photographed by FangWen.