GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Cryptochloa concinna

HABIT Perennial; caespitose. Culms 20–40 cm long; wiry. Leaves cauline; distichous. Leaf-sheaths longer than adjacent culm internode. Ligule an eciliate membrane; 0.2–0.8 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades spreading (in one plane, folding at night); lanceolate; 1.8–2.5 cm long; 6–8 mm wide. Leaf-blade margins scabrous. Leaf-blade apex abruptly acute.

INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Inflorescence a panicle; comprising 1–3 fertile spikelets (and 1–3 male); terminal and axillary; embraced at base by subtending leaf.

Panicle contracted; linear.

Sexes segregated; on unisexual branches; with male below. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 8.4–11.7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long.

GLUMES Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 1 length of upper glume; membranous; without keels; 5 -veined. Lower glume apex acuminate. Upper glume ovate; 1.3–1.5 length of adjacent fertile lemma; membranous; without keels; 5 -veined. Upper glume apex acuminate.

FLORETS Fertile florets female. Fertile lemma ovate; 6–7 mm long; indurate; pallid; shiny; without keel; 5 -veined. Lemma margins involute. Lemma apex acute. Palea 1 length of lemma; indurate; 2–4 -veined.

FLOWER Lodicules 3; membranous; veined; truncate. Anthers 3; 1.2–1.5 mm long. Stigmas 2.

FRUIT Caryopsis with tardily free pericarp; ovoid; dorsally compressed. Embryo 0.15 length of caryopsis.

MALE Male spikelets distinct from female; 2–2.5 mm long. Male spikelet glumes absent. Male spikelet lemma 3 -veined; muticous.

DISTRIBUTION South America: Mesoamericana and western South America.

NOTES Olyreae. Pohl.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.