| Chimonobambusa quadrangularis | 
| Scientific classification  | 
| Kingdom: | 
Plantae | 
 
| Clade: | 
Tracheophytes | 
 
| Clade: | 
Angiosperms | 
 
| Clade: | 
Monocots | 
 
| Clade: | 
Commelinids | 
 
| Order: | 
Poales | 
 
| Family: | 
Poaceae | 
 
| Genus: | 
Chimonobambusa | 
| Species: | 
C. quadrangularis  | 
| Binomial name | 
Chimonobambusa quadrangularis
 (Franceschi) Makino  | 
| Synonyms | 
List 
- Arundinaria quadrangularis  (Franceschi) Makino
 - Bambusa quadrangularis  Franceschi
 - Phyllostachys quadrangularis  (Franceschi) Rendle
 - Tetragonocalamus quadrangularis  (Franceschi) Nakai
 - Bambos sikaktake  Siebold
 - Bambusa sikaktake  Zoll.
 - Chimonobambusa quadrangularis f. albostriata  (Muroi & H.Okamura) T.H.Wen
 - Chimonobambusa quadrangularis f. aureostriata  (Muroi & H.Okamura) T.H.Wen
 - Chimonobambusa quadrangularis f. cyrano-bergeraca  T.H.Wen
 - Chimonobambusa quadrangularis f. nagaminea  (H.Okamura) T.H.Wen
 - Chimonobambusa quadrangularis f. purpureiculma  T.H.Wen
 - Chimonobambusa quadrangularis f. sotaroana  (Muroi) T.H.Wen
 - Chimonobambusa quadrangularis f. suow  T.H.Wen
 - Tetragonocalamus quadrangularis f. albostriatus  Muroi & H.Okamura
 - Tetragonocalamus quadrangularis f. aureostriatus  Muroi & H.Okamura
 - Tetragonocalamus quadrangularis f. castillonis  Rifat ex Hirsch
 - Tetragonocalamus quadrangularis f. gimmei  Kasahara & H.Okamura
 - Tetragonocalamus quadrangularis f. nagamineus  H.Okamura
 - Tetragonocalamus quadrangularis var. sotaroanus  Muroi
 - Tetragonocalamus quadrangularis f. sotaroanus  (Muroi) Muroi
 - Tetragonocalamus quadrangularis f. suow  Kasahara & H.Okamura
 - Tetragonocalamus quadrangularis f. tatejima  Kasahara & H.Okamura
 - Thamnocalamus quadrangularis  Recht. & Wetter
 
   | 
Chimonobambusa quadrangularis, commonly called square bamboo or shidakudake is a bamboo in the grass family (Graminae, or Poaceae)  and native to China and Taiwan, and naturalized to Japan. It is one of the very few monocots to have square stems. These stems, or culms are up to thirty feet (nine metres) in height and two inches (five centimetres) in diameter.