The grass genera of the world

L. Watson, T.D. Macfarlane, and M.J. Dallwitz

Mullerochloa K.M. Wong

~ Bambusa moreheadiana F.M. Bailey

Habit, vegetative morphology. Perennial; caespitose. Culms woody and persistent; cylindrical (the internodes 20–30 cm long); not twining, but scandent (500–700 cm long); branched above. Primary branches 4–10. The branching dendroid. Culm nodes inflated. Culm leaf sheaths present; deciduous. Culm leaves with conspicuous blades. Culm leaf blades linear. Culm internodes solid to hollow (the lumen if present small). Rhizomes short, pachymorph. Leaves not basally aggregated; auriculate. Leaf blades lanceolate (acuminate, the margins scabrous); broad; 17–30 cm long, 15–50 mm wide; pseudopetiolate; with 12–14 secondary veins. Ligule an unfringed membrane; 2–3 mm long. Contra-ligule present.

Reproductive organization. Plants bisexual, all with bisexual spikelets; with hermaphrodite florets. The spikelets hermaphrodite.

Inflorescence. Inflorescence determinate; with pseudospikelets; comprising untidy tufts of nodal clusters; a complex of ‘partial inflorescences’ and intervening foliar organs (20–30 cm long).

Female-fertile spikelets. Spikelets unconventional; 5–7 mm long; ovate; compressed laterally to not noticeably compressed (subterete); disarticulating above the glumes; disarticulating between the florets. Rachilla prolonged beyond the uppermost female-fertile floret; the rachilla extension with incomplete florets.

Glumes two; more or less equal; shorter than the spikelets; blunt, not pointed; awnless; non-carinate; about 3 mm long, ovate, similar. Spikelets with incomplete florets. The incomplete florets distal to the female-fertile florets. The distal incomplete florets merely underdeveloped; awnless. Spikelets without proximal incomplete florets.

Female-fertile florets 5–7. Lemmas ovate; not becoming indurated; entire; awnless; non-carinate; 7 nerved. Palea present; relatively long (exceeding ther lemma). Lodicules present; 3; membranous. Stamens 6; monadelphous. Ovary apically glabrous; without a conspicuous apical appendage.

Fruit, embryo and seedling. Pericarp fused.

Classification. Watson & Dallwitz (1994): not described separately. Soreng et al. (2015): Bambusoideae; Bambusodae; Bambuseae; Bambusinae. 1 species (M. moreheadiana).

Distribution, phytogeography, ecology. North Queensland, Australia.

References, etc. Morphological/taxonomic: Clayton et al. (2016), Grassbase. See Wong, K.M. (2005). Mullerochloa, a New Genus of Bamboo (Poaceae: Bambusoideae) from North-East Australia and notes on the circumscription of Bambusa. Blumea 50, 425–441.

Special comments. Anatomical data wanting.

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.’.