Elatostema oblongifolium Fu ex W.T.Wang, Bull. Bot. Lab. N. E. Forest. Inst., Harbin 7: 26. 1980.

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 oblongifolium Fu ex W.T.Wang, Bull. Bot. Lab. N. E. Forest. Inst., Harbin 7: 26. 1980.

≡ Pellionia bodinieri H. Lév., Repert. Spec. Nov. Regni Veg. 11: 551. 1913.

≡ Elatostema bodinieri (H. Lév.) Hand.-Mazz., Symb. Sin. Pt. 7: 144. 1929, nom. illeg., non H. Lév. 1913. Type: China. Guizhou: Gan-pin, 29 April 1897, Bodinier 1547 (syntype E); Ou-la-gay, 9 April 1898, Seguin s.n. (syntype: E).

= Elatostema schizocephalum W.T.Wang, Bull. Bot. Lab. N. E. Forest. Inst., Harbin 7: 82. 1980. Type: China. Hunan: Yizhang, 22 January 1942, S.Q. Chen 73 (holotype: PE [PE00023194!]). = Elatostema multicanaliculatum B.L.Shih & Yuen P. Yang, Bot. Bull. Acad. Sin. 36: 268. 1995. Type: China. Taiwan: Taoyuan Co., Mt. Lala, 23 October 1994, B.L. Shih 3226 (isotypes: HAST, TAI!, TAIF).

= Elatostema scaposum Q. Lin & L.D. Duan, Nordic J. Bot. 29: 420. 2011. Syn. nov. Type: China. Guizhou: Libo County, Jialiang Baibidong, alt. 800 m, 26 October 2003, Q. Lin & L.D. Duan 1023 (holotype: PE [PE01863021!]; isotypes E!, GH, HUH [HUH A00293663!], K, L, NY, PE [PE01863023!, PE01863023!], TUS, US, WU).

Description.

Perennial herb. Stems 20-90 × 0.5-12 mm, ascending or erect, branched or simple, with 5 or more longitudinal canals, glabrous; stipules 2, narrowly triangular to subulate or narrowly lanceolate, 2.5-12 × 0.2-2.0 mm, glabrous. Leaves sessile or short petiolate; laminae 50-220 × 14-50(-80) mm, obliquely oblong or elliptic, chartaceous, pinnately nerved; cystoliths densely scattered; base asymmetrical, broader-half rounded to cordate, narrower-half cuneate; margin serrulate to coarsely serrate; apex acuminate or long acuminate. Staminate inflorescences borne on modified or unmodified stems, solitary, cymiferous, shortly pedunculate, subglabrous; bracts membranous, ovate, lanceolate or linear, 2-12 mm, glabrous; staminate flowers pedicellate, glabrous; tepals 5, narrowly elliptic, ca. 2 mm, subapical appendage, shortly corniculate. Pistillate inflorescence paired, capitate; peduncle ca. 3 mm, glabrous; receptacle rectangle or broadly ovate, deeply divided into two lobes, lobe further weakly divided into two lobes, 2-10 × 3 mm, glabrous, subtended by marginal bracts, the bracts 25 or more, unequal, outer bracts major, triangular, 0.6-1.0 × 0.4-0.8 mm, glabrous, inner bracts minor, linear or lanceolate, sparsely ciliate; pistillate flowers pedicellate; bracteoles 2 per flower, subequal, 0.5-1.5 mm, linear, narrowly obovate or cymbiform; achenes 0.6-0.9 × 0.3-0.5 mm, broadly ellipsoidal or ovoid, ca. 6-ribbed.

Distribution.

This species is distributed in China (Chongqing, Hubei, Hunan, Guangxi, Guizhou, Sichuan, Taiwan, Yunnan) and Vietnam (Ha Giang).