Petrocosmea duyunensis (Gesneriaceae), a new species from Guizhou, China

Abstract

Plants belonging to the genus Petrocosmea are rare and small herbs difficult to find in the wild. In the present study, a new species, Petrocosmea duyunensis, from Guizhou, China, is described. The species is most similar to P. leiandra and differs from it by a distinctly recurved abaxial corolla lip, free anthers and included pistil. Detailed morphological comparisons are given. One population with about 100 mature individuals was found at the type locality. This new taxon was assessed as “Data Deficient” (DD) according to the IUCN standards.

Petrocosmea dejiangensis (Gesneriaceae), a new species from Guizhou, China

“…The genus, which currently comprises 64 taxa (GRC 2021, IPNI 2021, Wen et al 2021, is distributed from the eastern Himalayas to central China and Indo-China (POWO 2021). Plants in this genus are perennial, rhizomatous, stemless herbs with basal leaves and usually lax axillary inflorescences; the zygomorphic corolla can be blue to purple or white and usually show spots inside; flowers have two stamens and usually three staminodes; there is no disc; the ovary is unilocular with two placentas; the capsule is straight and dehiscing loculicidally into two valves (Gou et al 2010, Qiu et al 2012, Wang et al 1998, Han et al 2017, 2018, Jiang et al 2020, Tang et al 2021.…”