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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.
Phaenosperma
HABIT Perennial. Culms 100–300 cm long. Ligule an eciliate membrane. Leaf-blades lanceolate. Leaf-blade venation slanting obliquely from midrib; with distinct cross veins.
INFLORESCENCE Inflorescence a panicle.
Panicle open. Primary panicle branches whorled at most nodes.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong, or orbicular; laterally compressed, or dorsally compressed; 4–5 mm long; falling entire.
GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.75 length of upper glume; hyaline; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex acute. Upper glume ovate; 0.75 length of adjacent fertile lemma; hyaline; without keels; 3 -veined. Upper glume apex acute.
FLORETS Fertile lemma obovate; membranous; without keel; wingless; 3–7 -veined. Lemma surface unwrinkled; without grooves. Lemma apex obtuse. Palea 1 length of lemma; 2 -veined.
FLOWER Lodicules 3. Anthers 3. Stigmas 2. Ovary glabrous.
FRUIT Caryopsis with tardily free pericarp; orbicular; isodiametric. Hilum linear; 1 length of caryopsis.
DISTRIBUTION Temperate Asia, or Tropical Asia.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.