taxonID	type	description	language	source
A14A3E450B835E88B2B5F422EC170A56.taxon	diagnosis	Diagnosis. In terms of traits such as being a rosette-forming herb, possessing a single-flowered cyme, and having a pale purple corolla, P. pengzhouensis most closely resembles P. duclouxii but differs primarily in the following characteristics: leaf shape (ovate to oblique-ovate vs. ovate to nearly orbicular), corolla throat (spotless vs. bearing two deep purple spots), and filament pubescence (translucent-puberulent vs. rust-brown puberulent) (Table 2).	en	Zheng, Xinyi, Qu, Tianmeng, Chen, Xinyu, Zhang, Yanru, Wang, Jin, Li, Li, Wu, Wen, Wang, Yujie, Li, Bo, Huang, Ke, Fu, Zhixi (2025): Petrocosmea pengzhouensis (Gesneriaceae), a new species from Sichuan Province, China. PhytoKeys 262: 145-160, DOI: 10.3897/phytokeys.262.164617
A14A3E450B835E88B2B5F422EC170A56.taxon	description	Description. Perennial rosette-forming herbs. Roots fibrous, clustered. Leaves herbaceous, 13 – 26, basal, densely rosulate; inner leaves subsessile or with petioles to 2.2 cm long in outer leaves, densely pubescent and sparsely villous; leaf blade 0.4 – 1.8 cm long, 0.3 – 1.2 cm wide, ovate to oblique-ovate in outer leaves, apex obtuse to rounded, base cordate (sometimes oblique), margin crenate, adaxially sparsely villous, abaxially densely pubescent or sparsely villous; lateral veins 3 – 4 per side, slightly raised or flat abaxially. Cymes 1 – 5, each 1 - flowered; peduncle 0.5 – 4.3 cm long, densely pubescent or sparsely villous. Bracts absent. Calyx zygomorphic, 5 - parted to base; lobes narrowly lanceolate, 1.9 – 2.7 mm long, externally pubescent. Flowers pale purple, 8.7 – 13.8 mm long; corolla externally densely puberulent, internally glabrous; tube 4.3 – 6.4 mm long, throat 4 – 5 mm in diameter, base 2.5 – 3 mm in diameter, subcampanulate, throat blue-purple, unspotted; adaxial lip conspicuously shorter, 8 – 9 mm long, 2 - lobed to the middle, lobes ovate, 2 – 2.3 mm long, 2 – 2.5 mm wide, slightly reflexed; abaxial lip 11 – 13.8 mm long, 3 - lobed to the middle, lobes long-ovate, 2.6 – 3.0 mm long, 3.6 – 4.2 mm wide, slightly reflexed. Stamens 2, ca. 2.5 mm long; filaments adnate, ca. 1 mm above corolla base, 1.8 – 2.3 mm long, 0.3 – 0.5 mm in diameter, densely translucent-puberulent; anthers ovate, dehiscing longitudinally, ca. 1 mm long, 1.0 – 1.1 mm wide; thecae 2, parallel. Pistil 4.3 – 5.4 mm long; ovary densely villous, ovoid, ca. 1.3 mm long, 1.2 – 1.5 mm in diameter; style 3 – 4.1 mm long, 0.3 mm in diameter, sparsely pubescent below middle-upper portion, slightly geniculate (ca. 45 °) above base; stigma capitate, ca. 0.4 mm in diameter. Capsule straight relative to pedicel, 2.9 – 3.5 mm long, 1.2 – 1.3 mm in diameter, oblong to ovoid, dehiscing loculicidally to base.	en	Zheng, Xinyi, Qu, Tianmeng, Chen, Xinyu, Zhang, Yanru, Wang, Jin, Li, Li, Wu, Wen, Wang, Yujie, Li, Bo, Huang, Ke, Fu, Zhixi (2025): Petrocosmea pengzhouensis (Gesneriaceae), a new species from Sichuan Province, China. PhytoKeys 262: 145-160, DOI: 10.3897/phytokeys.262.164617
A14A3E450B835E88B2B5F422EC170A56.taxon	etymology	Etymology. The new taxon is named after the type locality, Pengzhou, Chengdu City, China.	en	Zheng, Xinyi, Qu, Tianmeng, Chen, Xinyu, Zhang, Yanru, Wang, Jin, Li, Li, Wu, Wen, Wang, Yujie, Li, Bo, Huang, Ke, Fu, Zhixi (2025): Petrocosmea pengzhouensis (Gesneriaceae), a new species from Sichuan Province, China. PhytoKeys 262: 145-160, DOI: 10.3897/phytokeys.262.164617
A14A3E450B835E88B2B5F422EC170A56.taxon	distribution	Distribution and habitat. To date, only a single population has been found, exclusively in the Feilaifeng Scenic Area of the Longmen Mountain National Geological Park in Pengzhou, Chengdu City, Sichuan Province, China. Petrocosmea pengzhouensis was found growing on rocks in limestone caves at an elevation of ca. 1116 m (Fig. 5).	en	Zheng, Xinyi, Qu, Tianmeng, Chen, Xinyu, Zhang, Yanru, Wang, Jin, Li, Li, Wu, Wen, Wang, Yujie, Li, Bo, Huang, Ke, Fu, Zhixi (2025): Petrocosmea pengzhouensis (Gesneriaceae), a new species from Sichuan Province, China. PhytoKeys 262: 145-160, DOI: 10.3897/phytokeys.262.164617
