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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.
Thyridachne
HABIT Annual. Culms erect; 30–70 cm long; spongy. Ligule an eciliate membrane. Leaf-blades stiff. Leaf-blade apex pungent.
INFLORESCENCE Inflorescence a panicle.
Panicle spiciform.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; tip discoid.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; gibbous; 3–4 mm long; falling entire.
GLUMES Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume oblate; clasping; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex obtuse. Upper glume ovate; gibbous; coriaceous; without keels; 5 -veined. Upper glume apex acute.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret ovate; coriaceous; 5 -veined; readily splitting into two halves; acute. Fertile lemma elliptic; cartilaginous; without keel; wingless; 3 -veined. Lemma surface unwrinkled; without grooves. Lemma apex acuminate. Palea cartilaginous.
FRUIT Caryopsis ellipsoid; flattened.
DISTRIBUTION Africa.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.