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.

Cyclostachya stolonifera

HABIT Perennial. Stolons present. Culms erect; 5–15 cm long. Leaves mostly basal. Ligule an eciliate membrane; 0.5–1 mm long. Leaf-blades flat, or involute; 4–8 cm long; 1 mm wide. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade margins scaberulous. Leaf-blade apex attenuate.

INFLORESCENCE Dioecious. Inflorescence composed of racemes; deciduous as a whole.

Racemes 1; single; arcuate; unilateral; 2–2.5 cm long. Rhachis flattened. Spikelet packing 2 -rowed.

Spikelets pectinate; solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels linear.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; dorsally compressed; 6–7 mm long; falling entire; deciduous with accessory branch structures. Floret callus pubescent (briefly).

GLUMES Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume linear; 5–7 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex attenuate. Upper glume lanceolate; 6–7 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein ciliate. Upper glume lateral veins absent. Upper glume apex attenuate.

FLORETS Fertile florets female. Fertile lemma lanceolate; 6–7 mm long; cartilaginous; keeled; 3 -veined. Lemma apex awned; 3 -awned. Principal lemma awn 3–4 mm long overall. Lateral lemma awns 1–2 mm long; shorter than principal. Palea 0.75 length of lemma; 2 -veined. Palea apex awned; awns 0.5–1 mm long. Apical sterile florets 2–3 in number; barren; in a clump; linear; 1 mm long. Apical sterile lemmas awned; 3 -awned. Apical sterile lemma awns 10–15 mm long.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 3 mm long.

FRUIT Caryopsis with adherent pericarp; fusiform; 2.5 mm long. Embryo 0.66 length of caryopsis.

MALE Male inflorescence similar to female; a single raceme; with pectinate racemes. Male spikelets distinct from female; 1 flowered; with rudimentary apical florets (1 floret); persistent; lanceolate; 4–5 mm long; hairy. Male spikelet glumes 2; muticous. Male spikelet lemma 3 -veined; muticous (but rudiment 3-awned).

DISTRIBUTION North America: Mexico.

NOTES Cynodonteae. WDC.

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