1. Tribe BAMBUSEAE - China

POACEAE 49● Forested hills; 1000–1700 m. S Yunnan.2. Melocalamus scandens Hsueh & C. M. Hui, Acta Phytotax.Sin. 30: 166. 1992.大 吊 竹 da diao zhuCulms to 20 m, 2–4 cm in diam.; internodes 45–50 cm;wall ca. 5 mm thick; nodes flat, each with a brown tomentosering above and below. Branches several, dominant ones to 6 m.Culm sheaths brown, asymmetrical, leathery, initially minutelypowdery, apex oblique; auricles asymmetrical, with some oralsetae; ligule ca. 1 mm, entire; blade erect, triangular, base aboutas wide as sheath apex. Leaf sheaths glabrous; auricles minute;ligule ca. 1 mm; blade lanceolate, 15–25 × 1.5–2.5 cm. Inflorescenceunknown.● Broad-leaved montane forests; 700–1000 m. S Yunnan.3. Melocalamus elevatissimus Hsueh & T. P. Yi, J. BambooRes. 2(1): 28. 1983.西 藏 梨 籐 竹 xi zang li teng zhuCulms to 20 m, 1.5–3 cm in diam.; internodes 40–70(–120) cm, initially hispid; wall 4–10 mm thick; nodes flat,each with a brown tomentose ring below. Branches several,main mid-culm ones to 6 m. Culm sheaths dark brown, 24–38cm, leathery, with appressed, minute, yellow spiny hairs, apexwith thin projections 1–2 cm on each side; auricles absent;ligule depressed, ca. 1 mm; blade erect, linear-lanceolate, basearticulate. Leaf sheaths glabrous; auricles absent; ligule ca. 1mm; blade oblong-lanceolate, 20–40 × 3–9 cm. Inflorescenceunknown.● Broad-leaved montane forests; 900–2000 m. SE Xizang.This species appears very similar to Cephalostachyum latifolium.4. Melocalamus arrectus T. P. Yi, Acta Bot. Yunnan. 10: 440.1988.澜 沧 梨 籐 竹 lan cang li teng zhuCulms 10–15 m, 2–4 cm in diam.; internodes 20–40(–60)cm, initially pubescent; wall rather thick; nodes prominent, eachwith a ring of white powder and tomentum below. Branchingfrom 2nd to 3rd nodes upward, 1–3 dominant, to 8 m. Culmsheaths pale brown, ca. 1/3 as long as internodes, leathery,appressed pubescent, apex truncate; auricles minute; oral setaefew, deciduous; ligule ca. 1 mm, ciliate; blade erect, triangularor ovate-triangular. Leaf sheaths glabrous; ligule ca. 1 mm;auricles absent; oral setae absent to 2, minute; blade lanceolate,12–22 × 2.2–4 cm. Flowering branches leafy or leafless; internodesdensely pubescent. Pseudospikelets minute. Glumes 2,1.5–2 mm; rachilla internodes ca. 0.5 mm; lemma ca. 2 mm;palea membranous. Lodicules linear-lanceolate, 1–1.5 mm. Anthersca. 1 mm. Ovary ovoid, glabrous. Caryopsis globose, ca. 2cm.● Tropical rain forests, secondary forests; 700–1900 m. S Yunnan.This species was previously referred to by the name “Dinochloabambusoides” (Q. H. Dai, Bamboo Spec. & Cultivation Guangxi, 9.1987), which was not validly published.6. BONIA Balansa, J. Bot. (Morot) 4: 29. 1890.单 枝 竹 属 dan zhi zhu shuXia Nianhe ( 夏 念 和 ); Chris StapletonMonocladus L. C. Chia et al.Clump-forming scrambling bamboos, small to medium sized. Rhizomes short necked, pachymorph. Culms solid or nearly so;nodes slightly prominent. Branches solitary, nearly as thick as culms. Culm sheaths persistent, leathery; auricles subfalcate to broadlyfalcate, large; ligule short; blade erect. Leaf blade lanceolate to linear-lanceolate, usually large, base truncate; venation not tessellate.Inflorescence iterauctant, fully bracteate, arising from axil of persistent spathiform bracts; prophylls 2-keeled, gemmiferous, insertedat point of branching, closely followed by 2 or 3 closely spaced, gemmiferous bracts. Pseudospikelets 3–9-flowered, uppermost floretimperfect; first fertile lemma separated from gemmiferous bracts by rachilla segment to 1 cm. Rachilla disarticulating betweenflorets, internodes to 1 cm. Lemma subleathery; palea of lowest floret slightly longer than lemma, subleathery; palea of other floretsmuch shorter than lemma, membranous; lodicules 3, glabrous. Stamens 6; filaments free. Ovary glabrous; style very short; stigmas 3,plumose. Caryopsis terete, glabrous.Five species: S China, Vietnam; four species (all endemic) in China.1a. Culm sheath auricles inconspicuous ....................................................................................................................... 4. B. parvifloscula1b. Culm sheath auricles well developed.2a. Ligules of culm sheath and leaf sheath long ciliate ................................................................................................ 1. B. saxatilis2b. Ligules of culm sheath and leaf sheath entire.3a. Culm sheath blade obliquely cordate, amplexicaul; leaf blade abaxially glaucous, pubescent; culminternodes white powdery, sparsely brown strigose ................................................................................ 3. B. amplexicaulis3b. Culm sheath blade nearly rounded, not amplexicaul; leaf blade abaxially pale green, glabrous; culmnot white powdery, glabrous .............................................................................................................................. 2. B. levigata1. Bonia saxatilis (L. C. Chia et al.) N. H. Xia, Kew Bull. 51:567. 1996.单 枝 竹 dan zhi zhuCulms 1–4 m, 4–8 mm in diam.; internodes 25–40 cm,glabrous, initially white powdery. Branches 0.5–1.5 m. Culmsheaths shortly tomentose and stiffly dull brown hairy, or gla-