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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.
Gymnopogon doellii
HABIT Perennial. Rhizomes short. Culms erect; 55–95 cm long. Lateral branches lacking. Leaves distichous. Leaf-sheaths 3–12 cm long; longer than adjacent culm internode; scaberulous; glabrous on surface. Ligule a fringe of hairs; 0.2 mm long. Leaf-blade base broadly rounded. Leaf-blades lanceolate; 5–10 cm long; 5–10 mm wide. Leaf-blade midrib indistinct. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence composed of racemes; embraced at base by subtending leaf. Peduncle 10–13 cm long.
Racemes few, or numerous; 15–30; borne along a central axis; unilateral; 15–20 cm long. Central inflorescence axis 7.5–9.5 cm long. Rhachis angular; scabrous on margins. Spikelet packing broadside to rhachis. Raceme-bases pilose.
Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels oblong.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 6–9.5 mm long; 1–1.2 mm wide; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous; obtuse.
GLUMES Glumes persistent; similar; exceeding apex of florets; gaping. Lower glume lanceolate; 5.1–9 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume linear; 5.2–9.6 mm long; 2–3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acuminate.
FLORETS Fertile lemma lanceolate; 2.4–3.1 mm long; 0.4–0.5 mm wide; membranous; keeled; 3 -veined. Lemma margins ciliate; hairy above. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn subapical; 7–10.6 mm long overall. Palea 2–2.9 mm long. Palea apex dentate; 2 -fid. Rhachilla extension 1–1.7 mm long. Apical sterile florets 1 in number; barren; linear; 0.5–1 mm long. Apical sterile lemmas pilose; adorned on margins; awned; 1 -awned. Apical sterile lemma awns 2.2–6.6 mm long.
FLOWER Anthers 3; 0.6–1 mm long.
FRUIT Caryopsis with adherent pericarp; linear; sulcate on hilar side; 2.3 mm long; dark brown.
DISTRIBUTION South America: Brazil.
NOTES Cynodonteae. Boech & Valls 1997.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
