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: 27th January 2014.