No.12   FANG WEN, BI-DAN LAI, ZHI-GUO ZHAO, BING-MOU WANG& YI-GANG WEI

Primulina linearicalyx (Gesneriaceae), a new species from Guangxi, China

Phytotaxa 269(1): 41‒46.

ABSTRACT

PrimulinalinearicalyxfromWumingCounty,Guangxi,isillustratedanddescribedhere.ItismorphologicallyclosetoP.lin- earifolia, P. pseudolinearifolia and P. longgangensis, but it can be easily distinguished by the exceptionally long andlinear- lanceolatetolinearcalyxlobes.Thechromosomenumberforthisspecies,beingreportedthefirsttime,wasdeterminedtobe 2n=36. The conservation status of the new species was assessed as “Critically Endangered” (CR) based on IUCNcriteria.

FIGURE 1. Primulina linearicalyx. A. Habit, B. Abaxial leaf surface showing the prominent veins, C. Opened corolla showing stamens and staminodes, D. Cyme, showing bracts, calyx lobes and pistil, E. Stigma.

FIGURE 2. Primulina linearicalyx. A. Type locality at the foot of the Damingshan Mountain, B. Habitat, C & D. Habit, E. Flowering plant in cultivation, F. Abaxial leaf surface, G. Bud and calyx lobes, H. Frontal view of flowers, I. Lateral view of corolla and calyx lobes, J. Top view of corolla and calyx lobes, K. Immature capsule, L. Mature and dehisced capsule.

FIGURE 3. Somatic chromosomes at metaphase of Primulina linearicalyx. A to F showing microphotographs from different cells with 2n=36, from roots of leaf cuttings of B.D.Lai 111016-1, IBK.