Family:
Poaceae Barnhart
Genus:
Calamagrostis Adans.

Calamagrostis australis (Moritzi) Buse

This species is accepted, and its native range is Malesia to New Guinea.

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 10-80 cm long. Culm-internodes distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 2-4 mm long; lacerate. Leaf-blades flat, or involute; 4-30 cm long; 1-8 mm wide; light green, or glaucous. Leaf-blade surface glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; equilateral, or nodding; 2.5-26 cm long. Primary panicle branches whorled at lower nodes. Panicle axis smooth, or scaberulous; pilose. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1.5-6 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose, or bearded. Floret callus hairs 1.5-2.5 mm long; 0.33-0.5 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose, or bearded. Floret callus hairs 1.5-2.5 mm long; 0.33-0.5 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 3.5-4 mm long; 0.9 length of upper glume; coriaceous; mid-green, or purple; 1-keeled; 1 -veined. Lower glume primary vein ciliolate. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 4.5-5.5 mm long; 1.1 length of adjacent fertile lemma; coriaceous; mid-green, or purple; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 4-5 mm long; membranous; without keel; 5 -veined. Lemma surface scabrous. Lemma apex dentate; 2 -fid, or 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33-0.5 way up back of lemma; straight; 5-8 mm long overall. Palea 1 length of lemma. Rhachilla extension 0.3-1 mm long; pilose.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 1.25-1.5 mm long; anther tip penicillate. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
Asia-tropical: Malesia and Papuasia.
Reference
Aveneae. Fl Java 1997.

Native to:

Jawa, Lesser Sunda Is., New Guinea, Sulawesi, Sumatera

Calamagrostis australis (Moritzi) Buse appears in other Kew resources:

First published in F.A.W.Miquel, Pl. Jungh., prepr.: 3 (1854)

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.

Literature

Kew Backbone Distributions

  • Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.

  • GrassBase - The Online World Grass Flora

    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 2022. 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