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3a Culm sheath apex with white wax and white to brown hairs at the base, culm 
sheath margin with white to brownish hairs; culm below nodes covered with 
brownish and whitish hairs and white waxiness; leaf midrib prominent and leaf 
base yellow. D. luteus 
3b Culm sheath completely covered by white hairs and without wax, culm sheath 
margin glabrous; culm below nodes glabrous; leaf midrib not prominent and leaf 
base not yellow. D. bengkalisensis 
4a Culm sheath auricles rim-like and crisped to blade base; ligules with 4-15 mm 
long bristles. D. buar 
4b. Culm sheath auricles rounded lobes; ligules glabrous. D. bait 
5a. Culm sheath auricles rim-like. D. latiflorus 
5b. Culm sheath auricles small or rounded lobes, with wavy folds or crisped to blade 
base.6 
6a. Lower culm of young culm with dense velvety brown hairs. D. asper 
6b. Lower culm of young culm without velvety hairs.7 
7a Culm sheath auricles crisped to the blade base; culm sheath ligules more than 1 
mm high. D. giganteus 
7b Culm sheath auricles small lobes with wavy folds; culm sheath ligules up to 0.5 
mm high.8 
8a Culm sheath auricle glabrous; blade usually shorter than half of the sheath length 
. D. brandisii 
8b Culm sheath auricle with long bristles; blade usually exceeding half of the sheath 
length. D. membranaceus 
Dendrocalamus luteus Damayanto & Widjaja, sp. nov. 
Dendrocalamus luteus resembles D. bengkalisensis Widjaja (Widjaja, 1997) but differs 
in having white to brown culm sheath hairs, lobe-like leaf sheath auricles, and brownish 
and whitish hairs below the culm node (in contrast, D. bengkalisensis has consistently 
white culm sheath hairs, rounded 0.5-1 mm high leaf-sheath auricles, and is glabrous 
below the culm node). - TYPE: Sumatra, Jambi Province, Batanghari Subdistrict, Sei 
Bahar (now Muaro Jambi District, Sei Bahar Subdistrict), 8 July 2006 Widjaja 8128 
(holotype BO [one specimen over three sheets], accession No. BO-1934223 (shoot), 
BO-1934220 (leafy branch), BO-1934224 (inflorescence); isotype K). (Fig. 1) 
Culm yellowish green to yellow; brownish and whitish hairs and white waxiness 
below the node when young, which disappears at maturity. Branch complement with 
a dominant primary branch which becomes very long (up to 5 m) and overarches onto 
neighbouring trees or even droops to the ground; culm and branch tips that droop to 
