The grass genera of the world
Habit, vegetative morphology. Perennial; shortly rhizomatous and caespitose (the internodes 100–200 cm long). The flowering culms leafless. Culms 700–1800 cm high; woody and persistent; to about 2.5 cm in diameter; cylindrical; leaning, not scandent. Buds from which the primary culm branches arise (where recorded) 1. Primary branches from a single bud, 4–10 (subequal); clumped. The branching dendroid. Culm nodes without roots. Culm leaf sheaths present. Culm leaves with conspicuous blades. Culm leaf blades where recorded, linear. Culm internodes hollow. Leaves not basally aggregated; auriculate to non-auriculate (inconspicuous). Leaf blades lanceolate; broad; 15–25 cm long, 20–30 mm wide; pseudopetiolate. Ligule an unfringed membrane. Contra-ligule present.
Reproductive organization. Plants bisexual, all with bisexual spikelets; with hermaphrodite florets. The spikelets hermaphrodite.
Inflorescence. Inflorescence indeterminate; with pseudospikelets; (synflorescence) spatheate (with glumaceous or spathaceous subtending bracts, leafy between the clusters - with each pseudospikelet subtended by a bract almost as long as the lemmas). Spikelets not secund.
Female-fertile spikelets. Spikelets unconventional; 10–25 mm long; lanceolate; compressed laterally; disarticulating above the glumes; disarticulating between the florets; with distinctly elongated rachilla internodes between the florets. Rachilla prolonged beyond the uppermost female-fertile floret; the rachilla extension with incomplete florets.
Glumes ambiguously, in descriptions seen, one per spikelet, or two to several (? - preceded by gemmiferous bracts); long relative to the adjacent lemmas (about equalling the lowest). Lower glume without pits. Spikelets with incomplete florets. The incomplete florets distal to the female-fertile florets. The distal incomplete florets 1; merely underdeveloped (?); awnless. Spikelets without proximal incomplete florets.
Female-fertile florets 1–2. Lemmas lanceolate or ovate; smooth (neither wrinkled nor grooved); not becoming indurated; entire; pointed; awnless, or mucronate (acute to cuspidate); non-carinate; 9 nerved, or 14 nerved. Palea present; relatively long to conspicuous but relatively short (somewhat shorter than the lemma); not convolute; awnless, without apical setae; several nerved (10); 2-keeled (with keels approximated or well separated). Lodicules present; 3; membranous (neither fleshy nor basally protruding); ciliate, or glabrous. Stamens 6. Anthers 4 mm long. Ovary apically glabrous to apically hairy; with a conspicuous apical appendage to without a conspicuous apical appendage. The appendage when young, long, stiff and tapering (i.e., then not Bambusa-like), or broadly conical, fleshy.
Classification. Watson & Dallwitz (1994): not described separately. Soreng et al. (2015): Bambusoideae; Bambusodae; Bambuseae; Bambusinae. Supposedly 2 species (K. wrayi, K. nebulosa).
Distribution, phytogeography, ecology. Vietnam, Borneo.
References, etc. Morphological/taxonomic: Clayton et al. (2016), Grassbase; K. M. Wong (1993): Four New Genera of Bamboos (Gramineae: Bambusoideae) from Malesia. Kew Bulletin 48, 517–532. Leaf anatomical: the Clayton et al (2016) index for K. nebulosa leads to Nianhochloa ...
Special comments. Fruit data wanting. Anatomical data wanting. Illustrations. • K. wrayi, as Bambusa wrayi, with Bambusa spp.: Camus, 1913.. • Abbreviations for Camus (1913) figures
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, distributions of character states within any set of taxa, geographical distribution, and classifications. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘Watson, L., Macfarlane, T.D., and Dallwitz, M.J. 1992 onwards. The grass genera of the world: descriptions, illustrations, identification, and information retrieval; including synonyms, morphology, anatomy, physiology, phytochemistry, cytology, classification, pathogens, world and local distribution, and references. Version: 11th December 2017. delta-intkey.com/grass’.