Petrocosmea dejiangensis Sheng H. Tang & Jian Xu 2022
Creators: name: Xu, Jian
name: Li, Sa
name: Tang, Sheng-Hu
name: Ren, Qi-Fei
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Gesneriaceae
Petrocosmea
Petrocosmea dejiangensis

description: Key to Petrocosmea dejiangensis and its alliance
1 Corolla light green or white................................................................................................................................................................2
– Corolla blue or purple.........................................................................................................................................................................3
2 Corolla light green, leaf blade 3–7 mm long.................................................. P. viridis Han & Yan Liu in Han et al. (2017: e01566)
– Corolla white, leaf blade 25–40 mm long ..................................................................................... P. cryptica Shaw (2011: 177–179)
3 Leaf blades margins deeply lobed ............................................................................................. P. weiyigangii Wen (2019: 175–183)
– Leaf blades margins not deeply lobed ................................................................................................................................................4
4 Leaf blades narrowly oblanceolate.................................................................................. P. xingyiensis Wei & Wen (2009: 261–262)
– Leaf blades subcordate, suborbicular, ovate, elliptic, or obovate.......................................................................................................5
5 Leaf blades base peltate ............................................................. P. huanjiangensis Yan Liu & W.B.Xu in Xu et al. (2011: 385–387)
– Leaf blades base not peltate................................................................................................................................................................6
6 Leaf blades base cuneate, broadly cuneate or rounded ......................................................................................................................7
– Leaf blades base cordate...................................................................................................................................................................12
7 Filaments straight ...............................................................................................................................................................................8
– Filaments curved near the middle.......................................................................................................................................................9
8 Leaf blades base cuneate ....................................................... P. chiwui M.Q.Han, H.Jiang & Yan Liu in Jiang et al. (2020: e02847)
– Leaf blades base rounded ............................................. P. rotundifolia M.Q.Han, H.Jiang & Yan Liu in Jiang et al. (2020: e02847)
9 Adaxial leaf blades surfaces densely brownish yellow appressed puberulent ..................... P. sericea C.Y.Wu ex Li (1983: 18–27)
– Adaxial leaf blades surfaces densely or sparsely erect pilose, with or without pustulate hairs at the base ....................................10
10 Filaments villous ............. P. shilinensis Y.M.Shui & H.T.Zhao var. changhuensis T.F.Lü & Y.Z.Wang in Li et al. (2019: 145–158)
– Filaments glandular-pubescent .........................................................................................................................................................11
11 Filaments purple, lateral lobes of abaxial corolla lip wide-ovate......................................................................................................... .......................................................................................... P. purpureoglandulosa Y.Dong & Y.Z.Wang in Li et al. (2019: 145–158)
– Filaments white, lateral lobes of abaxial corolla lip triangular ................................... P. minor Hemsley in Hooker (1899: pl. 2600)
12 Filaments glabrous, sparsely pilose, or densely pilose.....................................................................................................................13
– Filaments densely glandular puberulent or glandular pilose............................................................................................................16
13 Filaments glabrous or sparsely pilose........................................... P. leiandra (Wang 1984: 9–35) Z.J.Qiu in Qiu & Liu (2015: 116)
– Filaments densely pilose...................................................................................................................................................................14
14 Leaf blades 50–150 mm long ........................................................ P. funingensis Qiang Zhang & B.Pan in Zhang et al. (2013: 5–8)
– Leaf blades 10–35 mm long .............................................................................................................................................................15
15 Anthers narrowly ovoid............................................................ P. shilinensis Y.M.Shui & H.T.Zhao in Zhao et al. (2010: 328–330) – Anthers widely triangular ............................................... P. qiruniae M.Q.Han, Li Bing Zhang & Yan Liu in Han et al. (2019: 1–5)
16 Apex of abaxial corolla lip lobes reflexed.................................................... P. duyunensis Sheng H.Tang in Tang et al. (2021: 1–8)
– Apex of abaxial corolla lip lobes not reflexed..................................................................................................................................17
17 Petioles densely villous and golden-brown glandular puberulent................................ P. adenophora Huang & Xin (2021: e02944)
– Petioles sparsely or densely pilose and lacking glandular hairs.......................................................................................................18
18 Anthers longer than filaments ................................................................................ P. iodioides Hemsley in Hooker (1899: pl. 2599)
– Anthers shorter than filaments, or subequal to filaments in length..................................................................................................19
19 Style bending downward at base ....................................................... P. longituba M.Q.Han & Yan Liu in Li et al. (2019: 145–158)
– Style straight.....................................................................................................................................................................................20
20 Leaf blades margin entire ............................................................. P. qionglaiensis C.Q.Li & Y.Z.Wang in Li et al. (2019: 145–158)
– Leaf blades margin crenate, or crenulate to denticulate ...................................................................................................................21
21 Stigma apex rounded, two dark blue-purple stripes inside the entire corolla tube.......... P. dejiangensis Sheng H.Tang & Jian Xu
– Stigma apex flat, two purple spots inside the tube under stamens ................... P. martini (Léveillé 1903: 166) Léveillé (1911: 329)
description: Published as part of Xu, Jian, Li, Sa, Tang, Sheng-Hu & Ren, Qi-Fei, 2022, Petrocosmea dejiangensis (Gesneriaceae), a new species from Guizhou, China, pp. 17-23 in Phytotaxa 539 (1) on pages 21-22, DOI: 10.11646/phytotaxa.539.1.2, http://zenodo.org/record/6345899