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Issue: Vol. 704 No. 2: 6 Jun. 2025
Type: Article
Published: 2025-06-06
DOI: 10.11646/phytotaxa.704.2.4
Page range: 165-177
Abstract views: 158
PDF downloaded: 53

New species and distribution record of Schizostachyum (Poaceae, Bambusoideae) from Indonesia

Doctoral Program, Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Jalan Unand, Kampus Limau Manis, Padang, 25163, West Sumatra, Indonesia
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Jalan Unand, Kampus Limau Manis, Padang, 25163, West Sumatra, Indonesia
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Jalan Unand, Kampus Limau Manis, Padang, 25163, West Sumatra, Indonesia
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Jalan Unand, Kampus Limau Manis, Padang, 25163, West Sumatra, Indonesia
Research Center for Biosystematics and Evolution, National Research and Innovation Agency, Indonesia (BRIN), Jalan Raya Jakarta-Bogor, km 46, Cibinong, Bogor, West Java, 16911, Indonesia
Research Center for Biosystematics and Evolution, National Research and Innovation Agency, Indonesia (BRIN), Jalan Raya Jakarta-Bogor, km 46, Cibinong, Bogor, West Java, 16911, Indonesia
Faculty of Agriculture, Khairun University, Jalan Pertamina Kampus II Unkhair Gambesi, Ternate Selatan, Maluku Utara, Indonesia
Borneo Indonesia new record new species Schizostachyum Sumatra taxonomy Monocots

Abstract

Schizostachyum sumpurkudusense Ritonga (Poaceae, Bambusoideae), a newly described bamboo species from Sumatra, Indonesia, is presented here along with an illustrations. This species bears similarities to Schizostachyum hantu S.Dransf. from Borneo (Sarawak, Malaysia) morphologically, particularly in having prominent culm and leaf sheath auricles with long bristles. However, it can be distinguished by several key features. Culm sheath ligules of S. sumpurkudusense are entire and glabrous, unlike the short, bristled ligules of S. hantu. Moreover, the culm sheath blades of S. sumpurkudusense are spreading, whereas they are erect when young and later become deflexed in S. hantu. The adaxial surface of the blades at the base of S. sumpurkudusense is either glabrous or occasionally bears scattered light brown to white hairs, contrasting sharply with the dense, long white hairs found in S. hantu. The manuscript includes a detailed description, photographs, illustrations, a distribution map, preliminary conservation status, and a comparative table with the most similar species. On the other hand, S. hantu was previously only known from Sarawak, Malaysian Borneo, and was absent from the Indonesian part of Borneo (Kalimantan). Recent exploration in East Kalimantan, Indonesia, and based on specimen examination at the Herbarium Wanariset (WAN), confirmed the presence of S. hantu in Kalimantan. Thus, this marks the first official record of S. hantu in Indonesia, increasing the number of known Schizostachyum species in the country.

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How to Cite

Ritonga, M.A., Syamsuardi, Nurainas, Maideliza, T., Damayanto, I.P.G.P., Asmarayani, R. & Nurjannah, S. (2025) New species and distribution record of Schizostachyum (Poaceae, Bambusoideae) from Indonesia. Phytotaxa 704 (2): 165–177. https://doi.org/10.11646/phytotaxa.704.2.4