No.10   JING GUO, TAO MEMG, HONG-BO PANG & QIANG  ZHANG

Petrocodonretroflexussp.nov.(Gesneriaceae)fromakarstcavein Guizhou, China

Nordic Journal of Botany 34: 159‒164.

ABSTRACT

Petrocodon retroflexus Q. Zhang & J. Guo, a new species of Gesneriaceae from Guizhou, China, is described and illustrated. Te new species is morphologically similar to Petrocodon viridescens W. H. Chen, Mich. M ö ller & Y. M. Shui, but differs by its leaf blade being ovate, broadly ovate to elliptic, 8 – 20×5 – 15 cm and densely pilose on both surfaces, narrowly triangular, 9 mm long, densely pilose bracts, white corolla that is decurved near the middle, with adaxial lip shallowly 4-partitioned and retroflexed, and pistil ca 1.3 cm long and densely pilose and glandular-pilose (Cited from Guo et al., 2016).

Figure 1. The best ML tree from an analyses of the combined ITS and chloroplast trnL–F region. ML/MP bootstrap support values(＞50%) are shown above and below the branch around the corresponding node. Te new species is highlighted in bold (Cited from Guo et al., 2016).

Figure 2. Petrocodon retrofl exus sp. nov. (A) habit, (B) side view of flower, (C) opened corolla with stamens and staminodes, (D) pistil and calyx, (E) mature fruit. Drawn by W.-H. Lin from the holotype. (Cited from Guo et al., 2016)

Figure 3. Petrocodon retrofl exus sp. nov. (A) habitat, (B) habit, (C) inflorescence, (D) front view of flowers, (E) opened corolla with stamens and pistil, (F) side view of flower, (G) infructescence with young fruits, (H) pistil and opened calyx. (Cited from Guo et al., 2016)