Paraboea dolomitica (Gesneriaceae), a new species from Guizhou, China Author Guo, Zhiyou Qiannan Normal College for Nationalities, College of Biological Sciences and Agriculture, Duyun, 558000, China Author Wu, Zhaowen Jiangxi Province Key Laboratory of Watershed Ecosystem Change and Biodiversity, Institute of Life Science and School of Life Sciences, Nanchang University, Nanchang 330031, China Author Xu, Weibin Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences, Guilin 541006, China Author Li, Zhenyu State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Author Xiang, Xiaoguo Jiangxi Province Key Laboratory of Watershed Ecosystem Change and Biodiversity, Institute of Life Science and School of Life Sciences, Nanchang University, Nanchang 330031, China xiangxg2010@163.com text PhytoKeys 2020 153 37 48 http://dx.doi.org/10.3897/phytokeys.153.50933 journal article http://dx.doi.org/10.3897/phytokeys.153.50933 1314-2003-153-37 D901AD693AE0577F9140C44DBF11072A Paraboea dolomitica Z.Y. Li, X.G. Xiang & Z.Y. Guo sp. nov. Figs 2 , 3 Diagnosis. Paraboea dolomitica is morphologically similar to P. filipes . Both of them have obovate leaf blades, 1-4-flowered cymes and a purplish corolla, but P. dolomitica differs from P. filipes by its leathery leaves with denticulate margins ( vs. papery leaves with subentire margins in P. filipes ), peduncles sparsely covered with brown hairs (vs. sparsely sericeous-lanate when young and glabrate when mature), two woolly bracts (vs. two glabrous bracts), reniform anthers (vs. oblong anthers), two staminodes 0.3 cm long (vs. 1 staminodes 0.02 cm long), and flowering during April and May (vs. flowering during September and October) (Table 1 ). Figure 2. Paraboea dolomitica . A Habitat B flowering habit C flower face view D opened corolla showing stamens, staminodes and pistil E bracts F pistil with calyx G adaxial leaf blade; and H abaxial leaf blade. Phylogenetic analysis suggested that P. dolomitica was nested in a clade including P. crassifolia (Hemsl.) Burtt, P. tetrabracteata F. Wen, Xin Hong & Y. G. Wei, P. peltifolia D. Fang et Z. Zeng, P. vetutina (W. T. Wang et C. Z. Gao) Burtt, P. dushanensis W. B. Xu & M. Q. Han, P. dictyoneura (Hance) Burtt, P xiangguiensis W. B. Xu & B. Pan and P. guilinensis L. Xu et Y. G. Wei, but P. dolomitica can be easily differentiated from them in leaf position, inflorescence, penduncle, bract and capsule. The detailed morphological comparison of the species most morphologically similar to P. dolomitica is listed in Table 1 . Table 1. Morphological comparisons between Paraboea dolomitica and its relatives its relatives based on morphological observation and phylogenetic analyses.

Characters	P. dolomitica	P. filipes	P. dictyoneura	P. crassifolia	P. dushanensis	P. peltifolia
Rhizome	1.5-6.0 cm long, ca. 0.3-0.5 cm diam.	up to 2.5 cm long, ca. 0.3 cm diam.	1.5-2.5 cm long, 0.7-0.8 cm diam.	0.5-1.5 cm long, 0.5-0.9 cm diam.	4-10 cm long, 0.2-0.6 cm diam.	2-7 cm long, 0.5-1 cm diam.
Stem	present	absent	absent or up to 10 cm	absent or up to 15 cm	absent	present
Leaf position	crowded near the stem apex, opposite	basal, rosette	basal or crowded near the stem apex, rosette	basal or crowded near the stem apex	congested at the apex of rhizome	spiral at the stem apex
Leaf blade	leathery, obovate to elliptic, 2.5-4.5 x 1.0-1.5 cm, margin denticulate	papery, obovate to obovate-oblong, (1~) 2-5 x (0.3~) 0.7-2.2 cm, margin shallowly crenate or subentire	thick papery, oblanceolate, 7-19 x 1.2-4.5 cm, margin serrate to dentate or subentire	thick papery, obovate or ovate, 3-16 x 1.5-7 cm, margin crenate to denate or subentire	leathery, cuneate to attenuate, 4-8 x 0.7-1.5 cm, margin crenate to shallowly repand	papery, obovate to oblanceolate, spatulate or subspatulate, 6-33.5 x 3-14.3 cm, margin crenate-serrate
Cymes	1-4-flowered	1-4-flowered	5-20-flowered	4-12-flowered	1-5-flowered	2-15-flowered
Peduncle	3-5 cm long, sparsely lanate with glandular hairs	3-7 cm long, glabrescent	8-21 cm long, pannose to sparsely pannose	3-12 cm long, woolly to pannose	3-5 cm long, ferruginous matted indumentum	4-6 cm long, woolly
Bract	2, linear, 0.3-0.4 cm long	2, narrowly oblong-ovate, ca. 0.1 cm long	2 or 3, lanceolate to narrowly oblong, 0.5-1.3 cm long	2, linear to subulate, 0.2-0.5 cm long	2, linear-lanceolate, 0.3-0.5 cm long	2, lanceolate-triangular, 0.2-0.3 (~0.4) cm long
Calyx	5-parted	5-parted	5-parted	5-parted	5-parted	2-lipped
Corolla	purplish	purplish	purplish	purplish	purple-blue	white
Anther	reniform	narrowly oblong	oblong	oblong	elliptic	reniform
Staminodes	2, 0.3 cm long	1, ca. 0.02 cm long	3, 0.2-0.45 cm long	2, 0.2-0.25 cm long	3, 0.25-0.3 cm long	2, 0.2 cm long
Capsule	1.5-1.8 cm long, slightly twisted	0.5-1.1 cm long, not twisted	1.5-6 cm long, spirally twisted to nearly straight	2-4.5 cm long, spirally twisted	1.2-3.1 cm long, not twisted	1-3.6 cm long, not twisted
Flowering	April and May	September and October	April and May	June and July	May and June	March and April

Note: The morphological characters of P. filipes , P. dictyoneura , P. crassifolia and P. peltifolia are from Li and Wang (2004) and the characters of P. dushanensis are from Xu et al. (2017a) . Type. China. Guizhou: Shibing County, Yuntai Mountain, 27°06'80.7"N, 108°07'00.0"E , elevation 885 m, on rock faces of a karst dolomite cave, 2 May 2017, Z.Y. Guo 20170047 (holotype: PE!; isotypes: PE!, QNUN!). Perennial herbs. Rhizomes subterete, 1.5-6.0 cm long, 0.3-0.5 cm diam. Roots slender, fibrous. Leaves crowded near stem apex, opposite; blade leathery, obovate to elliptic, 2.5-4.5 cm long, 1.0-1.5 cm wide, apex acute or rounded, base rounded to broadly cuneate, margin denticulate, involute; adaxial surface with arachnoid covering when young, but glabrescent when mature, abaxially densely brown woolly; principal vein depressed above, raised beneath, lateral veins 3-6 on each side of midrib, tertiary venation inconspicuous; petiole 0.8-2.0 cm long, 0.2-0.3 cm broad, densely covered with appressed velvety hairs. Cymes axillary, umbel-like 1-4-flowered; peduncle 3-5 cm long, 0.05-0.08 cm in diameter, sparsely lanate and glandulose-pubescent. Bracts 2, 0.3-0.4 cm long, linear, woolly beneath; pedicel 0.8-2.2 cm long, 0.05-0.1 cm in diameter, sparsely lanate with glandular hairs. Calyx 5-parted, 0.4-0.6 cm long, 0.1-0.15 cm in diameter, apex acute, densely brown woolly; segments linear. Corolla oblique-campanulate, zygomorphic, purplish, 1.0-1.2 cm long, outside and inside glabrous; tube 0.5-0.6 cm long; throat ca. 0.7 cm in diameter; adaxial lip 2-lobed, lobes orbicular or deltoid, abaxial lip 3-lobed, lobes oblong-elliptic or oblong. Stamens 2, glabrous; filaments 0.5-0.6 cm long, ca. 0.08 cm in diameter, yellow, curved at the upper part; anthers reniform, ca. 0.3 cm long, 0.2 cm broad; staminodes 2, linear, ca. 0.3 cm long. Pistil glabrous, ovary linear, stigma capitate. Capsule linear, 1.5-1.8 cm long, 0.15-0.2 cm broad, glabrous, slightly twisted. Distribution. Paraboea dolomitica is known from Yuntai Mountain, Shibing County and Wuyang River, Zhenyuan County, Guizhou, China. Phenology. Flowering occurs in April and May and the fruiting occurs between June and August. Etymology. The specific epithet refers to the habitat of this new species, the dolomite karst area. Habitat and ecology. Paraboea dolomitica grows on rock faces of dolomite karst area, at an elevation of ca. 650-855 m. Accompanying plants in the habitat are sparse and include trees, such as Platycarya strobilacea Sieb. et Zucc., Cotinus coggygria Scop., and herbs such as Selaginella moellendorfii Hieron., Paphiopedilum micranthum T. Tang et F. T. Wang, Viola diffusa Ging., Galium aparine Linn. var. echinospermum (Wallr.) Cuf. and Carex sp. Additional collections. China. Guizhou: Zhenyuan County, Wuyang River, 27°06'80.7"N, 108°07'00.0"E , elevation 650 m, on rock faces, 3 August 2016, Guo ZY, GZY1608721 (PE and QNUN), GZY1608723 (PE and QNUN), GZY1608724 (PE and QNUN). Figure 3. Paraboea dolomitica . A Flowering habit B opened corolla showing stamens, staminode and pistil C pistil with calyx and D capsule. Drawn by Zhaowen Wu based on holotype and isotypes.