taxonID	type	description	language	source
893F573DD1255EDB98B7D722A2684F79.taxon	description	Figs 1, 2	en	Nguyen, Cuong Huu, Nguyen, Ly Van, Nguyen, Khang Sinh, Egorov, Alexander A., Averyanov, Leonid V. (2021): Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam. PhytoKeys 183: 108-114, DOI: http://dx.doi.org/10.3897/phytokeys.183.69180, URL: http://dx.doi.org/10.3897/phytokeys.183.69180
893F573DD1255EDB98B7D722A2684F79.taxon	materials_examined	Type. Vietnam. Ha Giang Province: Vi Xuyen District, Minh Tan Village, primary evergreen broad-leaved forest, around point 23 ° 00 ' 14.9 " N 104 ° 54 ' 55.9 " E, altitude 533 m, 19 January 2021, N. V. Ly, NVL 20210119001 (holotype: VNF!; isotype: LE http: // en. herbariumle. ru /? t = occ & id = 91550).	en	Nguyen, Cuong Huu, Nguyen, Ly Van, Nguyen, Khang Sinh, Egorov, Alexander A., Averyanov, Leonid V. (2021): Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam. PhytoKeys 183: 108-114, DOI: http://dx.doi.org/10.3897/phytokeys.183.69180, URL: http://dx.doi.org/10.3897/phytokeys.183.69180
893F573DD1255EDB98B7D722A2684F79.taxon	diagnosis	Diagnosis. Hemiboea chanii is similar to H. crystallina Y. M. Shui & W. H. Chen in the shape of leaf blade, leaf margin and the externally pubescent corolla, but differs in having non-inflated nodes, diamond-shaped not winged involucre, flat calyx margin, corolla red-spotted inside with a ring of hairs, and stigma slightly swollen. It also morphologically resembles H. sinovietnamica W. B. Xu & X. Y. Zhuang but differs in having 4 - 8 branches on main stem, repand-crenate leaf margin, involucre diamond-shaped with a cirrose apex, and pink corolla and a slightly swollen stigma (Table 1).	en	Nguyen, Cuong Huu, Nguyen, Ly Van, Nguyen, Khang Sinh, Egorov, Alexander A., Averyanov, Leonid V. (2021): Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam. PhytoKeys 183: 108-114, DOI: http://dx.doi.org/10.3897/phytokeys.183.69180, URL: http://dx.doi.org/10.3897/phytokeys.183.69180
893F573DD1255EDB98B7D722A2684F79.taxon	description	Description. Perennial lithophytic herb. Stem ascending to erect, with 12 - 16 nodes on the main stems, not inflated, glabrous, subterete, 50 - 90 cm tall, 3 - 7 mm in diameter, with 4 - 8 branches. Leaves petiolate, opposite, unequal to sub-equal in a pair; petiole 1.5 - 4.5 cm long, about 2 mm in diameter, glabrous, green to purple; leaf blade narrowly ovate, ovate, oblong or elliptic, coriaceous when dry, 7.5 - 12 cm long, 2.5 - 5 cm wide, glabrous, adaxial surface dark green, abaxial surface pale greenish, at base cuneate, sometimes slightly oblique, apex acute or shortly acuminate, repand-crenate along the margin, median and lateral veins inconspicuous adaxially and protuberant abaxially, lateral veins in 6 - 10 pairs. Inflorescence subterminal, 2 - 3 - flowered cyme; peduncle 0.8 - 1 cm long, about 1 mm in diameter, glabrous, green to pale green; involucre diamond-shaped, not winged, 1.6 - 1.8 cm in diameter, outside glabrous, with two cirrose opposite apices. Calyx white, actinomorphic, 5 - lobed, dissected from the base; segments subequal, narrowly lanceolate 1.3 - 1.4 x 0.2 - 0.3 cm, glabrous, margin entire flat, 1 - veined. Corolla infundibular, outside pink with numerous red spots on adaxial lip, inside red spotted, 3.5 - 4 cm long; tube 3.0 - 3.6 cm long, 1.4 - 1.6 cm in diameter at the orifice, 3 - 4 mm in diameter at the base, sparsely glandular pubescent outside; inside with a ring of hairs adnate to 3 - 4 mm above the corolla base; limb distinctly two-lipped; adaxial lip 3 - 4 mm long, 2 - lobed at apex, lobes subequal, nearly semi-circular, margin recurved; abaxial lip 6 - 8 mm long, 3 - lobed, lobes unequal, with rounded apex, median lobe larger, broadly ovate, lateral 2 smaller, slightly obliquely ovate. Stamens 2, adaxial, adnate to 1.1 - 1.3 cm above the corolla base; filaments filiform, coiled, 1.2 - 1.4 cm long, 1 mm in diameter; anthers basifixed, globular, 1.5 - 1.7 mm in diameter, coherent at the apex. Staminodes 3, linear, glabrous, with inflated apex, adnate to 13 - 15 mm above the corolla base, the middle one 2 - 3 mm long, lateral ones 9 - 10 mm long. Disc circular, lemon-yellow, 1.2 - 1.4 mm high, margin repand, glabrous. Pistil 24 - 26 mm long; ovary narrowly cylindrical, glabrous, 7 - 8 mm long, about 2 mm in diameter; style 17 - 18 mm long, terete, glabrous, about 1 mm in diameter, apex curved; stigma slightly swollen, truncate. Capsule oblique in relation to pedicel, terete to narrowly fusiform, 2.6 - 3 cm long, glabrous, slightly curved, dehiscing adaxially; valves 2, straight, not twisted.	en	Nguyen, Cuong Huu, Nguyen, Ly Van, Nguyen, Khang Sinh, Egorov, Alexander A., Averyanov, Leonid V. (2021): Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam. PhytoKeys 183: 108-114, DOI: http://dx.doi.org/10.3897/phytokeys.183.69180, URL: http://dx.doi.org/10.3897/phytokeys.183.69180
893F573DD1255EDB98B7D722A2684F79.taxon	distribution	Distribution and habitat. The new species is only known from Minh Tan Village, Ha Giang Province, growing in cracks of limestone rocks in moist shady places or occasionally in the upper part of slopes, and on rocky hilltops in primary evergreen broad-leaved forests on karstic limestone at elevations 500 - 700 m a. s. l. Some of main herbaceous species accompanying the new species have been recorded as Aglaonema modestum Schott ex Engl., Amorphophallus tonkinensis Engl. & Gehrm., Begonia spp., Impatiens bonii Hook. f., Laportea interrupta (L.) Chew, Primulina balansae (Drake) Mich. Moeller & A. Weber, and Rhaphidophora decursiva (Roxb.) Schott	en	Nguyen, Cuong Huu, Nguyen, Ly Van, Nguyen, Khang Sinh, Egorov, Alexander A., Averyanov, Leonid V. (2021): Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam. PhytoKeys 183: 108-114, DOI: http://dx.doi.org/10.3897/phytokeys.183.69180, URL: http://dx.doi.org/10.3897/phytokeys.183.69180
893F573DD1255EDB98B7D722A2684F79.taxon	etymology	Etymology. Hemiboea chanii is named in honor of the lecturer, Mr. Le Mong Chan, for his outstanding contributions to the conservation of the flora of Vietnam.	en	Nguyen, Cuong Huu, Nguyen, Ly Van, Nguyen, Khang Sinh, Egorov, Alexander A., Averyanov, Leonid V. (2021): Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam. PhytoKeys 183: 108-114, DOI: http://dx.doi.org/10.3897/phytokeys.183.69180, URL: http://dx.doi.org/10.3897/phytokeys.183.69180
