| ochlandra abracteata |
| ochlandra acriptoria |
| ochlandra beddomii |
| ochlandra rheedii, known as ochlandra acriptoria |
| ochlandra satigara |
| ochlandra sivagiriana |
| ochlandra stridula |
| ochlandra stridula maculata |
| ochlandra talbotii |
| ochlandra travancorica |
| ogon chiku (China & Japan), known as phyllostachys bambusoides holochrysa |
| ogon hotei (Japan), known as phyllostachys bambusoides holochrysa |
| ohshida zasa (Japan), known as sasa oshidensis flavo-variegata |
| okame zasa (Japan), known as shibataea kumasaca |
| okina dake (Japan), known as pleioblastus argenteostriatus |
| okina dake akebono zasa (Japan), known as pleioblastus akebono |
| okinawa dake (Japan, Suzuki), known as bambusa multiplex |
| okuezotafuku zasa (Japan, Suzuki), known as sasa palmata |
| okume zasa shima (Japan), known as shibataea kumasaca aureo-striata |
| okume zasa shiro suji (Japan), known as shibataea kumasaca albo-striata |
| oldham bamboo, known as bambusa oldhamii |
| oldhamii, known as bambusa oldhamii |
| oligostachyum glabrescens |
| olmeca recta |
| oloh otong (Indonesia), known as dendrocalamus asper |
| oreocalamus szechuanensis |
| ori (Java, Indonesia), known as bambusa bambos |
| oroshima chiku (Japan), known as pleioblastus distichus |
| oshida zasa (Japan), known as sasa oshidensis |
| oshida zasa kisuji (Japan), known as sasa oshidensis flavo-marginata |
| oshidensis, known as sasa oshidensis |
| oshikotan zasa (Japan, Suzuki), known as sasa palmata |
| otagi zasa (Japan, Suzuki), known as sasa tsuboiana |
| otatea acuminata acuminata |
| otatea acuminata aztecorum |
| otatea fimbriata |
| owatari, known as pseudosasa owatari |
| oxytenanthera abyssinica |
| oxytenanthera bourdillonii |
| oxytenanthera braunii |
| oxytenanthera monadelpha |
| oxytenanthera nigrociliata |
| oxytenanthera stocksii |