Schizostachyum grande Ridley (1920: 204)

Sungkaew, Sarawood, Wong, Khoon Meng, Hodkinson, Trevor R., Thammanu, Siriluck, Cheysawat, Somboon & Teerawatananon, Atchara, 2024, Taxonomic revision of the bamboo genus Schizostachyum (Bambusoideae: Melocanninae) in Thailand, with two new species and five new records, lectotypifications and nomenclatural corrections, Phytotaxa 676 (3), pp. 263-286 : 273

(7) Schizostachyum grande Ridley (1920: 204) . Figs. 2C–D .

Type: — MALAYSIA, Malay Peninsula, Selangor, Semangkok Pass, 1904, Ridley 12043 (lectotype first step designated by Holttum (1958: 51); second step here designated: SING [SING0054954!]; isolectotypes: K [K000290730!, K000290731!].

Distribution and ecology: — Schizostachyum grande is considered a Malay Peninsular floristic element as the northernmost distribution of this species is peninsular Thailand. It commonly occurs in foothills, in the valleys of mountain ranges or along streams of evergreen forests.

Addition specimens examined: — THAILAND: Peninsular. Surat Thani, Ban Ta Khun , 10 July 2004, S. Sungkaew & A. Teerawatananon 100704-2 (Thailand Natural History Museum) ; the same locality, 10 July 2004, S. Sungkaew & A. Teerawatananon 100704-6 ( Thailand Natural History Museum) ; the same locality, 10 July 2004, S. Sungkaew & A. Teerawatananon 100704-8 ( Thailand Natural History Museum) ; the same locality, 12 July 2004, S. Sungkaew & A. Teerawatananon 120704-4 ( Thailand Natural History Museum) ; Khao Sok National Park , 20 February 2001, S. Dranfield & al. SD1492 ( L0399324 , L0399325 ) ; Phanom , 14 December 2009, C. Rattamanee M206 ( BKF197516 ) ; the same locality, 22 October 2022, S. Sungkaew & A. Teerawatananon 1736 ( Thailand Natural History Museum) ; Phang Nga, Thap Put , 23 October 2022, S. Sungkaew & A. Teerawatananon 1740 ( Thailand Natural History Museum) ; the same locality, 18 January 1984, WN 282 ( BKF107366 ) ; Nakhon Si Thammarat, Chawang , 10 April 1996, S. Dransfield et al. 1399 (BKF110745, L0362085 , L0362086 ) ; Songkhla, Saba Yoi , 25 October 2022, S. Sungkaew & A. Teerawatananon 1748 ( Thailand Natural History Museum) ; Yala, Ba Nang Sata , 30 December 1966, B. Sangkhachand 1470 ( BKF46249 ) ; the same locality, 19 April 1996, S. Dransfield et al. SD1421 (BKF110759, L0362087 , L0362088 ) ; Betong , 10 April 1996, C. Niyomdham & P. Phudja 4622 ( BKF126970 ) . MALAYSIA: Selangor, 14 March 1948, R.E. Holttum 38412 (K001308846) ; Ginting Bidai , May 1896, Ridley 7787 ( SING0330084 ) .

Conservation status: — Schizostachyum grande has an EOO of 46,555.0 km 2, which places it in the Least Concern (LC) conservation category while its small AOO of less than 500 km 2 (108.0 km 2) puts this species in the Endangered (EN) category. However, as there are many populations together with many individuals usually found both inside and outside the protected areas, we therefore consider the conservation status of S. Grande in the LC category according to IUCN (2023).

Vernacular name: —ไผ่ตากวาง (Phai Ta Kwang), ไผ่ เหนียง (Phai Neing), ไผ่เหมียง (Phai Miang), ไผ่เหลียง (Phai Lieang).

Notes: —Foliage leaves of S. grande are used to wrap bachang, a steamed Chinese glutinous rice dumpling.

Nomenclatural notes: —According to Ridley (1920), S. grande was described based on the following specimens; Ridley 8457 & 12043, Machado 11591, Curtis 3475 and Ridley 7787, which were collected from Semangkok Pass, Selangor, Malaysia. In 1958, Holttum designated Ridley 12043 as the lectotype. However, there are two duplicates of Ridley 12043 deposited in K and SING. According to Art. 9.17 in the Shenzhen code ( Turland et al. 2018), the typification proposed by Holttum (1958) is considered a first-step lectotypification.Here, a second-step lectotypification is carried out by designating the specimen of Ridley 12043 deposited at SING (SING0054954) as the lectotype of S. grande since it comprises complete flowering specimens and the rest of the specimens are treated as isolectotypes.

Figures

FIGURE 2. (A–B) Schizostachyum brachycladum (Kurz) Kurz. (A) Culm internode with culm leaf; (B) Young culm shoot. (C–D) S. grande Ridl. (C) Young culm shoot; (D) Culm leaf on culm internode. (E–F) S. pergracile (Munro) R.B.Majumdar. (E) Culm internode with culm leaf; (F) Young culm shoot. (G–H) S. zollingeri Steud. (G) Culm leaf on culm internode; (H) Young culm shoot. (I–L) S. chinense Rendle. (I) Clump habit; (J) Young culm shoot; (K) Young culm showing culm leaf characteristics (with concave and inflated apex of the sheath proper, and erect blades) and a node; (L) Flowering branch. (Photographed by A. Teerawatananon & S. Sungkaew).