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.

Sporobolus sciadocladus

HABIT Annual; caespitose; clumped loosely. Basal innovations intravaginal. Culms erect, or geniculately ascending; 25–50 cm long. Culm-internodes smooth; distally glabrous. Lateral branches sparse. Leaf-sheaths smooth; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs scanty, or lacking. Ligule a fringe of hairs; 0.3 mm long. Leaf-blades 10–20 cm long; 3–6 mm wide. Leaf-blade midrib keeled beneath. Leaf-blade surface scaberulous; rough adaxially; glabrous. Leaf-blade margins glabrous, or ciliate. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 5–10 cm long; 0.5–1.5 cm wide. Primary panicle branches appressed; 6–10 -nate; whorled at most nodes; 1–2.7 cm long. Panicle axis 7–9 noded; smooth; glabrous. Panicle branches flexuous; glandular.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.2–2.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; reaching apex of florets. Lower glume lanceolate; 1.4–1.7 mm long; 0.5–0.66 length of upper glume; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume surface smooth. Lower glume apex acuminate. Upper glume lanceolate; 2.1–2.4 mm long; 1 length of adjacent fertile lemma; hyaline; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume surface smooth. Upper glume apex acute, or acuminate.

FLORETS Fertile lemma lanceolate; 2–2.3 mm long; membranous; without keel; 1 -veined. Lemma apex acute. Palea readily splitting down midline; elliptic; 2–2.1 mm long; 2 -veined. Palea keels approximate. Palea apex emarginate.

FLOWER Lodicules 2; 0.25 mm long. Anthers 3; 0.4–0.5 mm long.

FRUIT Caryopsis with free soft pericarp; ellipsoid; laterally compressed; 1.5–1.8 mm long. Embryo 0.5 length of caryopsis.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Eragrostideae. Baaijens 1997.

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