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Chimonobambusa quadrangularis 

square culms foliage shoot apex branching solitary shoot red cross-veins
see photos at BambooWeb
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exact origin unknown
see account in Flora of China
see account in Index to Japanese Bambusaceae
see listing in ABS Species & Sources List
find UK supplier
See description in Kew's GrassBase - The Online World Grass Flora
See description in Kew's GrassBase - The Online World Grass Flora

Square Bamboo

Chimonobambusa quadrangularis  (Fenzi) Makino, Bot. Mag. Tokyo. 28: 153. 1914.

 Synonyms: Bambusa quadrangularis Fenzi; Arundinaria quadrangularis (Fenzi) Makino; Phyllostachys quadrangularis (Fenzi) Rendle

  Missouri Botanical Garden's Tropicos Database of Names  TROPICOS

    International Plant Names Index   IPNI

   Multilingual Multiscript Plant Names Database  MMPND

 Electronic Plant Identification CentreElectronic Plant Identification Centre  KEW

Rhizomes to 1 m or longer, remaining below ground. Culms 2–8 m tall, 1-4 cm thick, erect or nodding, diffuse and solitary in open spreading thickets; lower nodes usually thorny, prominent; internodes to 20 cm, more or less strongly quadrangular in cross-section, lightly scabrous or tubercular, remaining matt green. Branches 3, short, budscale of two short, single-keeled bracts. Culm sheaths shorter than the internodes, quickly deciduous, thin, glabrous, edges ciliate, veins elevated, conspicuously purple-tessellated and spotted; auricles and oral setae absent; blades 1–3 mm, triangular to acicular. Leaf sheaths deciduous, glabrous, edges ciliate; ligule very short, to 1 mm, truncate, pubescent; auricles absent; oral setae up to 5 each side, erect, white, to 5 mm; blades to 15 cm long, to 1.5 cm wide, conspicuously tessellate, abaxial and adaxial glabrous, petiole glabrous. Spikelets (1–)2–4, 2–3 cm, slender; florets 2–5, basal 0–2 rudimentary. Name from the quadrangular culms.

Cultivars with yellow culms striped green and some variegated leaf blades are also available.

Widely distributed in W. China, Chimonobambusa quadrangularis is now cultivated in many countries. A resilient bamboo, hardy to -13C, it thrives in warmer climates, where it can spread aggressively. It is considered an invasive naturalised weed in Hawaii. Although Tetragonocalamus angulatus (Munro) Nakai and Chimonobambusa angulata (Munro) Nakai are widely assumed to be synonyms of Chimonobambusa quadrangularis, it has been known for some time that they are actually synonyms of Bambusa breviflora Munro, itself now considered to be a synonym of B. tuldoides.







exact origin unknown Chimonobambusa quadrangularis was introduced into Europe from China in the 19th Century, original location unknown.

[marmorea] [quadrangularis] [szechuanensis] [tumidissinoda]