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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.
Triniochloa stipoides
HABIT Perennial; caespitose. Culms 50–135 cm long; 1 mm diam. Culm-internodes hollow. Culm-nodes glabrous. Leaf-sheaths tubular for much of their length; with 1 of their length closed; ribbed; antrorsely scabrous. Ligule an eciliate membrane; 5–10 mm long; lacerate. Leaf-blades flat, or conduplicate; 10–25 cm long; 2–3 mm wide. Leaf-blade surface scabrous; rough abaxially; pilose; sparsely hairy; hairy adaxially.
INFLORESCENCE Inflorescence a panicle. Peduncle pubescent above.
Panicle open; pyramidal; effuse; 15–25 cm long. Primary panicle branches whorled at most nodes.
Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels filiform.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; compressed slightly; 11–13 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.25 length of lemma.
GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 3.5–4.5 mm long; 0.9 length of upper glume; membranous; without keels; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume ovate; 4–5 mm long; 0.4 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acuminate.
FLORETS Fertile lemma ovate; 11–13 mm long; coriaceous; without keel; 7–9 -veined. Lemma surface scabrous. Lemma apex lobed; 2 -fid; with linear lobes; incised 0.25 of lemma length; awned; 1 -awned. Principal lemma awn dorsal; arising 0.75 way up back of lemma; geniculate; 15–20 mm long overall; with twisted column. Palea 1 length of lemma; coriaceous. Palea keels contiguous above a sulcus; scabrous. Palea apex dentate; 2 -fid.
FLOWER Lodicules 2; united; fleshy; truncate. Anthers 3; 4 mm long.
DISTRIBUTION North America: Mexico. South America: Mesoamericana, northern South America, and western South America.
NOTES Meliceae. Pohl.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
