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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.
Agropogon lutosus
HABIT Perennial; culms solitary, or caespitose; clumped loosely. Culms geniculately ascending, or decumbent; slender; 8–60 cm long. Culm-internodes smooth. Lateral branches sparse; arising from lower culm. Leaf-sheaths smooth. Ligule an eciliate membrane; 3–7 mm long; erose; obtuse. Leaf-blades 3–20 cm long; 2–11 mm wide. Leaf-blade surface scaberulous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; lanceolate, or oblong, or ovate; continuous, or interrupted; 2–18 cm long; 0.6–7 cm wide.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 2–3 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume elliptic, or oblong; 2–3 mm long; 1 length of upper glume; membranous; 1-keeled; keeled above; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex emarginate; awned; 1 -awned. Lower glume awn 1–2 mm long. Upper glume elliptic, or oblong; 2–3 mm long; 1.5–2 length of adjacent fertile lemma; membranous; 1-keeled; keeled above; 1 -veined. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex emarginate; awned; 1 -awned. Upper glume awn 1–2 mm long.
FLORETS Fertile lemma elliptic to oblong; 1.5–2 mm long; hyaline; without keel; 5 -veined. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn subapical; 3 mm long overall. Palea oblong; 0.75 length of lemma; hyaline; 2 -veined.
FLOWER Lodicules 2; lanceolate; membranous. Anthers 3; 1 mm long. Stigmas 2.
FRUIT Caryopsis with adherent pericarp. Hilum linear.
DISTRIBUTION Europe: northern, southwestern, and southeastern. Africa: Macaronesia and northeast tropical. Asia-temperate: Soviet Middle Asia, western Asia, and China. Asia-tropical: India and Indo-China. Australasia: Australia and New Zealand. North America: Mexico. South America: Caribbean.
NOTES Aveneae. CEH 1997.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
