Poaceae
Arundinella

Arundinella setosa Trin.

First published in Gram. Panic.: 63 (1826)
This species is accepted
The native range of this species is Tropical & Subtropical Asia to N. Australia. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial. Rootstock evident. Butt sheaths glabrous, or woolly. Culms 50-100 cm long. Culm-nodes glabrous. Leaf-sheaths glabrous on surface, or pilose. Ligule a ciliolate membrane. Leaf-blades 10-25 cm long; 2-5 mm wide. Leaf-blade surface glabrous to hirsute. Leaf-blade margins glabrous, or ciliate. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; bearing juvenile spikelets at emergence. Panicle open; oblong, or ovate; nodding; 5-30 cm long; contracted about primary branches. Primary panicle branches 1-15 cm long. Panicle axis smooth, or scabrous. Spikelets solitary, or in pairs. Fertile spikelets pedicelled; 1-2 in the cluster. Pedicels scabrous; bearing a few hairs; hairy at tip.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; obtuse.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; obtuse.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume elliptic; 3.5-5 mm long; 0.6-0.7 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acuminate; awned; 1 -awned. Upper glume elliptic; 5.5-7 mm long; 2 length of adjacent fertile lemma; membranous; 1-keeled; 5 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex caudate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male, or barren; with palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; elliptic; 3-4.5 mm long; membranous; 1-keeled; 5 -veined; obtuse. Fertile lemma lanceolate; 2.5-3 mm long; coriaceous; dark brown; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface asperulous. Lemma margins involute; interlocking with palea keels. Lemma apex dentate; 2 -fid; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 5-9.5 mm long overall; with twisted column. Column of lemma awn 3.5 mm long. Lateral lemma awns arising on apex of lobes; 2-3.5 mm long. Palea with auriculate flaps; coriaceous; 2 -veined. Palea surface asperulous.
Morphology Reproductive morphology Flowers
Lodicules 2; cuneate; fleshy. Anthers 3; 1.5 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Embryo 0.6 length of caryopsis. Hilum punctiform.
Distribution
Asia-temperate: China and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia.
Reference
Arundinelleae. Bor 1993.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • 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 Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0