large bamboo varieties
Refers to any of the larger species of bamboo, as opposed to smaller varieties like 女竹 (めだけ). Used in botanical or traditional contexts.
Large bamboo varieties are often used as construction material.
Compound of 雄 (お, 'male, large') and 竹 (たけ, 'bamboo'), referring to larger bamboo species. The exact historical derivation is uncertain, but the term is conventionally used in contrast to 女竹 (めだけ, 'female bamboo') for smaller varieties.