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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.
Digitaria fiebrigii
HABIT Perennial. Culms erect; 70–80 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous. Leaf-sheaths 10–12 cm long; glabrous on surface. Ligule an eciliate membrane; 1.5–2 mm long; erose; obtuse. Leaf-blades 15–35 cm long; 2–3 mm wide. Leaf-blade surface glabrous; hairless except near base.
INFLORESCENCE Inflorescence composed of racemes. Peduncle hispid above.
Racemes 2–4; paired, or digitate; unilateral; 7–13 cm long. Central inflorescence axis 1–1.5 cm long. Rhachis angular; 0.5 mm wide; scabrous on margins.
Spikelets in threes, or clustered at each node. Fertile spikelets pedicelled; 3–4 in the cluster. Pedicels angular; unequal; 0.5–4.5 mm long; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.3–2.5 mm long; falling entire.
GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.2 mm long; 0.1 length of spikelet; hyaline; 0 -veined. Lower glume lateral veins absent. Lower glume apex truncate. Upper glume lanceolate; 1.9–2 mm long; 0.75 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pilose. Upper glume apex acute.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 2.3–2.5 mm long; 1 length of spikelet; membranous; 7 -veined; hirsute; hairy between veins but central interspaces glabrous; setose on margins; acute. Fertile lemma elliptic; 2.3–2.5 mm long; 0.8–0.9 mm wide; cartilaginous; much thinner on margins; light brown, or dark brown; without keel. Lemma margins flat; covering most of palea. Lemma apex acute. Palea 1 length of lemma; cartilaginous.
FLOWER Lodicules 2; 0.2 mm long. Anthers 3; 1 mm long.
FRUIT Caryopsis with adherent pericarp; 1 mm long. Embryo 0.4–0.5 length of caryopsis. Hilum punctiform.
DISTRIBUTION South America: southern South America.
NOTES Paniceae. Fl Paraguay 1997.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
