Petrocodon retroflexus Q. Zhang & J. Guo, a new species of Gesneriaceae from Guizhou, China, is described and illustrated. The new species is morphologically similar to Petrocodon viridescens W. H. Chen, Mich. Möller & 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.
Petrocodon retroflexus sp. nov. (Gesneriaceae) from a karst cave in Guizhou, China
Publication: Nordic Journal of Botany