No.4  HUI-QIN LI & YING-QIANG WANG

Petrocodon confertiflorus (Gesneriaceae), a new species from Guangdong,China

Ann. Bot. Fennici52：27—32.

ABSTRACT

A new species,Petrocodon confertiflorus H.Q.Li & Y.Q.Wang(Gesneriaceae) from GuangdongProvince in south China, is described and illustrated. It is most similar to P. dealbatus, but is distinct from its congeners by its bigger ovate-oblanceolate leaf blade with 6-12 pairs of lateral nerves, by the number of cymes (3-10) with 2—3 branches bearing densely placed flowers, by the swollen, urceolate corolla with a constricted orifice, by the stamens adnate to the corolla and with the anthers free, as well as by the leaf epidermal characters (Cited from Li et al., 2015).

Fig. 1. Petrocodon comtertiflorus (from the holotype). — A: Habit. — B: Inflorescence. — C: Flower. — D: Opened corolla, showing stamens and staminodes. — E: Calyx. — F: Ovary and style. — G: Anthers (anterior). — H: Anthers (dorsal). — K: Fruit (Cited from Li et al., 2015).

Fig. 2. Morphological comparison of (A) Petrocodon confertiflous and (B) P. dealbatus. — 1: Plant and habit. — 2: Flowers and cymes. — 3: Opened flowers. — 4: Infructescence with capsules (Cited from Li et al., 2015).

Fig. 3. Comparative morphology of leaf epidermal surface between (A) Petrocodon confertiflous and (B) P. dealbatus (LM,SEM). — 1: Adaxial epidermal cells. — 2: Adaxial cuticular membrane (SEM). — 3: Abaxial epidermal cells(LM). — 4: Abaxial cuticular membrane and stomata (SEM) (Cited from Li et al., 2015).