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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Polypogon magellanicus
HABIT Perennial; caespitose. Butt sheaths light brown; persistent and investing base of culm; with fibrous dead sheaths. Basal innovations extravaginal. Culms erect, or geniculately ascending, or decumbent; 5–45 cm long. Ligule an eciliate membrane; 1.5 mm long; scaberulous on abaxial surface; erose; truncate. Leaf-blades flat, or conduplicate; 2–16 cm long; 0.5–2 mm wide. Leaf-blade surface ribbed; scaberulous; rough adaxially. Leaf-blade margins scabrous.
INFLORESCENCE Inflorescence a panicle; aerial, or shorter than basal leaves. Peduncle smooth, or scaberulous above.
Panicle contracted; lanceolate, or elliptic; 2–10 cm long. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 1.5–5 mm long; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5–5 mm long; falling entire; deciduous with the pedicel. Floret callus pubescent; hairy in 2 tufts.
GLUMES Glumes similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 3.5–5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 3.5–5 mm long; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex acuminate.
FLORETS Fertile lemma ovate; 1.8–2.2 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma surface smooth, or scaberulous; rough above and on veins. Lemma apex dentate; 4 -fid; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 3–4 mm long overall; with twisted column. Palea 0.4–0.7 mm long; 0.25 length of lemma; hyaline.
FLOWER Lodicules 2; 0.5–0.6 mm long; membranous. Anthers 3; 0.5–0.9 mm long.
FRUIT Caryopsis with adherent pericarp; 1.2–1.6 mm long. Hilum linear.
DISTRIBUTION Australasia: New Zealand. South America: western South America and southern South America. Antarctic: Subantarctic islands.
NOTES Aveneae. Edgar 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
