var. tomentosum Trim., in Cat. Ceyl. Pl. 79. 1885

Yao, Gang, Song, Zhu-Qiu, Xue, Bin-E, Shi, Shi, Li, Yu-Ling & Luo, Shi-Xiao, 2020, Taxonomic revision of the genus Glochidion (Phyllanthaceae) in Taiwan, China, PhytoKeys 159, pp. 137-159 : 137

b. var. tomentosum Trim., in Cat. Ceyl. Pl. 79. 1885 Figure 2T-V

Type.

Sri Lanka, G.H.K. Thwaites 3432 (lectotype: BM-000617461, designated by Chakrabarty and Balakrishnan 2018; Isolectotypes: CAL, K-001081200 & K001081201).

Distribution and habitat.

This variety G. zeylanicum var. tomentosum is widely distributed from India, Myanmar, Thailand, Vietnam, to China and south Japan. In China, it occurs widely from southwestern areas to Taiwan. It shares a similar habitat with the typical variety G. zeylanicum var. zeylanicum . In Taiwan, G. zeylanicum var. tomentosum is distributed from Hsinchu and Taipei to Nantou. Hsu et al. (2006) recorded the distribution of this variety in Ilan Hsien, but relevant specimens were unavailable in the present study.

Taxonomic discussion.

Morphologically, the variety G. zeylanicum var. tomentosum differs from the typical variety G. zeylanicum var. zeylanicum by its hairy habit. For the hairy taxon, the name G. zeylanicum var. tomentosum was accepted by several authors in their treatment of Taiwanese Glochidion ( Hsieh 1977; Deng and Wang 1993) and further appreciated recently ( TPL 2013 continuously updated, Yao and Zhang 2015a), but in some other treatments the name G. hirsuttum (Roxb.) Voigt was adopted ( Li 1994; Hsu et al. 2006; Li and Gilbert 2008). In our taxonomic study of the genus Glochidion , it was found that the hairy variety (Figure 2T-V ) and the typical glabrous variety G. zeylanicum var. zeylanicum (Figure 2Q-S ) are very similar in habit and also shared similar distribution areas, so the name G. zeylanicum var. tomentosum is accepted here.

Representative specimens examined.

China. Taiwan. Detailed locality unknown, 10 June 1929, S. Sasaki s.n. (NAS); Hsinchu Hsien, Hsinfeng Hsiang, Fengshan Margin of fallow paddy, at an elevation of 5-10 m, 30 May 1991, W.P. Leu 946 (HAST); Hsinchu Hsien, Chupei Hsiang, on the slope along the riverbank of Fengshanhsi, at an elevation of 50-100 m, 27 November 1992, W.P. Leu 1645 (HAST); Hsinchu Hsien, Hsinfeng Hsiang, 22 March 2014, P.M. Zeng PM14 (NCAI); Nantou Hsien, Hsianshan-Sunmoon Lake, 23°50'29"N, 120°53'19"E, 19 September 1929, K. Sasaki 15394 (TAI); Nantou Hsien, Sun Moon Lake, 23°50'26"N, 120°55'26"E, September 1929, S. Sasaki s.n. (TAI); Nantou Hsien, Yuchih, at an elevation of 750 m, 25 December 1985, S.Y. Lu 18170 (HAST); Nantou Hsien, 26 April 1991, Y.S. Hsu & J.C. Liaw 174 (NCAI); Nantou Hsien, 8 June 1991, Y.S. Hsu & J.C. Liaw 216 (NCAI); Taipei Hsien, Shuiyuanti, 25°0'27"N, 121°31'48"E, 14 May 1929, S. Suzuki 19294 (TAI); Taipei Hsien, Sungshan, 25°2'53"N, 121°34'5"E, 27 April 1933, S. Sasaki s.n. (TAI); Taipei Hsien, Taihoku, 25°2'46"N, 121°30'43"E, 10 June 1929, S. Sasaki 9294 (TAI); Taipei Hsien, Tomitacho, 25°0'43"N, 121°32'7"E, 27 May 1932, T. Tanaka & Y. Shimada 11071 (TAI); Tomita-cho, Taihoku-shi, 27 May 1932, T. Tanaka et al. 11071 (IBSC, PE); Taipei Hsien, Kungkuan, roadside, at an elevation of 10-20 m, 20 March 1992, M.J. Deng 883 (HAST).

Figures

Figure 2. General morphology of Glochidion A-C G. acuminatum var. acuminatum Muell. Arg D, E, H G. ellipticum Wight F, G G. lanceolatum Hayata I-K G. philippicum (Cav.) C. B. Rob L, P G. puberum (L.) Hutch M-O G. rubrum Blume Q-S G. zeylanicum var. zeylanicum (Gaertn.) A. Juss T-V G. zeylanicum var. tomentosum Trimen A, D, F, I, M, R, T female flowers B, E, J, S, U male flowers C, G, H, K, N-Q, V fruits L female flowers and male flowers N male flowers and fruits. Photographs: A-C, F, G, I-K, M-O, Q-U by A. Kawakita (Kyoto University, Japan) D-E, H, L, P by G. Yao V Z. Q. Song.