碟环竹 die huan zhu

Dendrocalamus patellaris Gamble, Ann. Roy. Bot. Gard. Calcutta 7: 86. 1896; Chimonobambusa jainiana C. R. Das & D. C. Pal; Drepanostachyum jainianum (C. R. Das & D. C. Pal) R. B. Majumdar; Patellocalamus patellaris (Gamble) W. T. Lin.

Culms 6–10 m, 25–40(–60) mm in diam.; internodes 30–45 cm; wall thin. Branches several. Culm sheaths deciduous, leathery, abaxially striate, appressed brown setose; auricles absent; ligule fimbriate or ciliate; blade reflexed, lanceolate. Leaf sheath abaxially striate; ligule long, ciliate; blade variable in size, 19–24(–40) × 2.5–3.5(–10) cm. Inflorescence semelauctant, paniculate. Spikelets 2–3 cm; florets 4–7, apical one sterile with a reduced rachilla extension. Glumes 2, rounded, short, many veined; lemma broadly rounded, slightly scabrous, 9–11-veined, margins long pubescent, apex mucronate; palea keels scabrous, 2-veined between keels. Anthers yellow, apiculate. Ovary ovoid; style 1, oblong; stigmas 2, plumose. Caryopsis 1–1.2 cm.

Broad-leaved forests; 1000–1800 m. Yunnan [India, Laos, Myanmar, Nepal].

This species was initially described in Dendrocalamus after flowers of D. hamiltonii were mistakenly included in a gathering from NE India. In China, a new section of Dendrocalamus was established to accommodate this species along with several unrelated species of Dendrocalamus. The correct flowers were eventually found in Nepal, and also in NE India, where they were described as a new species of Chimonobambusa.