The grass genera of the world
Habit, vegetative morphology. Perennial (large bushes). Culms woody and persistent; scandent, or not scandent; branched above. Primary branches 1, or 4–10, or 11–20. The branching simple (N. coradata), or dendroid. Culm leaf sheaths present; at least sometimes deciduous; leaving a persisten girdle, or not leaving a persistent girdle; commonly conspicuously auriculate. Culm leaves with conspicuous blades. Culm leaf blades lanceolate, or ovate. Rhizomes pachymorph. Leaves not basally aggregated. Leaf blades pseudopetiolate; demarcated but persistent. Contra-ligule present, or absent.
Reproductive organization. Plants bisexual, all with bisexual spikelets; with hermaphrodite florets.
Inflorescence. Inflorescence indeterminate; with pseudospikelets (presumably?); paniculate (dense, oblong). Spikelet-bearing axes persistent. Spikelets not secund; pedicellate.
Female-fertile spikelets. Spikelets morphologically conventional; oblong, or ovate, or linear (usually). Rachilla prolonged beyond the uppermost female-fertile floret (?).
Glumes present; 3–4; awnless (mucronate); similar.
Female-fertile florets 1. Lemmas twisted; similar in texture to the glumes; not becoming indurated; mucronate to awned (or almost awned). Palea present; convolute around the flower, or not convolute. Lodicules absent (or very small). Stamens 6; monadelphous. Ovary with a conspicuous apical appendage. The appendage long, stiff and tapering. Styles fused (into one prolonged style). Stigmas 3.
Fruit, embryo and seedling. Pericarp thick and hard; free (the fruit a nut).
Classification. Watson & Dallwitz (1994): Bambusoideae; Bambusodae; Bambuseae. Soreng et al. (2015): Bambusoideae; Bambusodae; Bambuseae; Melocanninae. 4 species.
Distribution, phytogeography, ecology. Southeast Asia.
Special comments. Description very inadequate. Fruit data wanting. Anatomical data wanting. Illustrations. • N. mekongensis, with N. dullooa = Teinostachyum dullooa: E.G. Camus & M.A. Camus (1922), Fl. Gen. d'Indo-Chine.
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: 13th November 2017. delta-intkey.com/grass’.