var. acuminatum

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

var. acuminatum Figure 2A-C

Glochidion hayatae Croiz. & Hara, in J. Jap. Bot. 16: 316. 1940. Type: China. Formosa (now Taiwan). Holisha, Giochi. 28 April 1916, B. Hayata s.n. (holotype: TI-01804, photo!).

Distribution and habitat.

The typical variety G. acuminatum var. acuminatum is widely distributed from India, Nepal, through Indo-China Peninsula, to China and Japan. In China, it occurs widely from the southwestern area to Taiwan. It grows in evergreen broad-leaved forests, open forests, valleys, or near streams, usually from low altitude to 2600 m. The species is recorded from Ilan and Taipei Hsien, through Nantou and Taichung Hsien, to Kaosiung and Pingtung Hsien, in Taiwan.

Taxonomic discussion.

Two taxa are described under the species G. acuminatum , the typical variety G. acuminatum var. acuminatum and the variety G. acuminatum var. siamense Airy Shaw. The species is represented in Taiwan by the typical variety, and another variety is distributed in Thailand and Yunnan province of China ( Li and Gilbert 2008; Yao and Zhang 2015b). A detailed morphological comparison between the two taxa can be referenced in Yao and Zhang (2015b). The typical variety can be distinguished from all other Taiwanese Glochidion species by its small (5-7 mm in diameter) and deeply 6- or 8-grooved capsules (Figure 2C ).

Representative specimens examined.

China. Taiwan. Kaosiung Hsien, Shanping Station, at an elevation of 1000 m, 7 November 1991, C.C. Wang 818 (HAST); Ilan Hsien, Fushan, at roadside, 26 April 1992, S.L. Chen 927 (HAST); Nantou Hsien, at an elevation of 650 m, 5 October 2001, C.M. Wang 04509 (IBSC, PE); Nantou Hsien, Yuchih Hsiang, Lienhuachih, 23°55'08"N, 120°52'41"E, at an elevation of 640 m, 24 April 1996, C.N. Chen et al. 03316 (KUN); Nantou Hsien, Lienhuachi, 23°55'17"N, 120°54'20"E, 6 July 1936, K. Mori 1527 (TAI); Nantou Hsien, Lienhuachi, 23°53'53"N, 120°52'58"E, 24 July 1955, Y. Keng & Liu et al. s.n. (TAI); Nantou Hsien, Jenai Hsiang, Hui-Sun Experimental Forest, 24°05'34"N, 121°01'27"E, at an elevation of 660 m, 5 October 2000, C.M. Wang 04509 (IBSC, PE); Pingtung Hsien, Kueitsuchia, 21°57'56"N, 120°48'18"E, 1 January 1917, E. Matuda 1177 (TAI); Taichung Hsien, forest margin, at an elevation of 900 m, 18 April 2003, C.M. Wang 6609 (HAST); Taipei Hsien, Chutsuhu, 25°10'9"N, 121°31'54"E, 16 November 1969, C.C. Hsu 6561 (TAI); Taipei Hsien, Neihu, Naihosyo, 25°4'32"N, 121°34'49"E, 21 July 1973, C.M. Kuo 3640 (TAI); Taipei Hsien, Neihu, 25°05'0"N, 121°34'0"E, 16 October 1993, S.Y. Lu 24147 (PE); Taipei Hsien, Sekitei, 24°59'21"N, 121°38'57"E, 6 July 1949, K. Kao 1350 (TAI); Taipei Hsien, Wulai, Urai, 24°51'47"N, 121°32'34"E, 25 October 1929, S. Suzuki 3268 (TAI).

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.