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This species is accepted, and its native range is Papua New Guinea.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms woody; without nodal roots. Culm-internodes terete; thin-walled. Lateral branches dendroid. Leaves cauline. Leaf-sheath oral hairs ciliate; 6 mm long. Ligule a ciliate membrane. Collar with external ligule. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 13-35 cm long; 25-50 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; clustered at the nodes; in untidy tufts; lax; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; subterete; 12 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes definite; 1-2.5 mm long.
Fertile
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; subterete; 12 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes definite; 1-2.5 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 8-9 mm long; without keel. Lemma margins ciliate; hairy above. Lemma apex apiculate. Palea 1 length of lemma; 8 -veined. Palea keels ciliate. Apical sterile florets 1 in number; barren; rudimentary.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 6. Filaments free, or united in groups. Stigmas 3. Ovary umbonate; glabrous.
Distribution
Asia-tropical: Papuasia.
Reference
Bambuseae. Holttum 1996.

Native to:

New Guinea

Bambusa riparia Holttum appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Brass, L.J. [1105], Papua New Guinea K000290522 isotype
Gardner, C.A. [11685], Australia K000482749

First published in Kew Bull. 21: 275 (1967)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0