Elatostema coriaceifolium W.T.Wang, Acta Phytotax. Sin. 31(2): 170. 1993.

Xin, Zi-Bing, Monro, Alexandre K., Wang, Ren-Fen & Fu, Long-Fei, 2023, An integrative approach to species delimitation sinks three Chinese limestone karst Elatostema (Urticaceae) species, PhytoKeys 236, pp. 83-96 : 83

Elatostema coriaceifolium W.T.Wang, Acta Phytotax. Sin. 31(2): 170. 1993.

= Elatostema conduplicatum W.T.Wang, Guihaia 30(1): 3. 2010. Syn. nov. Type: China. Guangxi: Donglan County, Bala, Y.M. Shui & W.H. Chen B2004-171A (holotype: PE [PE01842427!]; isotype: KUN!).

Type.

China. Guizhou: Libo, Wengangmogan , 29 April 1984, Q.H. Chen et al. 2289 (holotype: HGAS) .

Description.

Perennial herb. Stems 140-185(-270) × 1.0-1.5 mm, erect, simple, fasciculate, furfuraceous, glabrous; stipules 2, triangular or narrowly ovate, 0.8-1.8 × 0.4-1.0 mm, without cystoliths. Leaves sessile or shortly petiolate, glabrous; laminae 12-24(-40) × 8-11(-14) mm, obliquely elliptic or rhombic-elliptic, chartaceous or thinly coriaceous, semitriplinerve; cystoliths densely scattered; base asymmetrical, broader-half auriculate, narrower-half cuneate; margin denticulate; apex acute. Staminate inflorescences solitary, capitate; sessile; receptacle inconspicuous, subtended by marginal bracts; the bracts 6, unequal, outer 2 bracts major, broadly ovate, conduplicate, 4-4.5 × ca. 3 mm, abaxial surface with 1 longitudinal rib, ribbed extending apically as a corniculate protuberance, inner 4 bracts minor, oval, ca. 3 × 2-2.8 mm, abaxial surface with 1 longitudinal rib, ribbed extending apically as a corniculate protuberance, glabrous; staminate flowers pedicellate; bracteoles 2 per flower, subequal, ca. 2.4 × 1.0 mm, linear-cymbiform, subapical appendage, corniculate, shortly ciliate; tepals 5, broadly ovate, subapical appendage 0.8-1.1 mm, corniculate, pubescent. Pistillate inflorescence solitary, capitate; peduncle ca. 1 mm, glabrous; receptacle broadly rectangular, 3-3.5 mm, glabrous, subtended by marginal bracts, the bracts ca. 20, unequal, outer 6 bracts major, triangular or broadly ovate, ca. 1.1 × 0.4-2 mm, subapical appendage, inner bracts minor, narrowly triangular or linear, sparsely ciliate or glabrous; pistillate flowers pedicellate; bracteoles 2 per flower, equal, 0.9-1.5 × 0.1-0.4 mm, linear, ciliate or glabrous; achenes ca. 0.8 mm, narrowly ellipsoidal, ca. 6-8-ribbed.

Distribution.

This species is endemic to China (Guangxi, Guizhou).