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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.
Festuca uninodis
HABIT Perennial; caespitose. Butt sheaths grey. Basal innovations intravaginal. Culms erect; 35–40 cm long; 1 -noded. Culm-internodes terete; antrorsely scabrous. Leaf-sheaths inflated; open for most of their length; antrorsely scabrous; glabrous on surface. Leaf-sheath auricles erect. Ligule a ciliolate membrane; 1 mm long; truncate. Leaf-blades erect; filiform; convolute; 15–20 cm long; 0.6–0.7 mm wide; stiff. Leaf-blade venation comprising 11 vascular bundles; with 5 inner ridges; with 16 subepidermal sclerenchyma strands; with subepidermal sclerenchyma attached to veins above and below; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface scabrous. Leaf-blade apex pungent.
INFLORESCENCE Inflorescence a panicle.
Panicle open; linear, or oblong; dense; 8–10 cm long. Primary panicle branches appressed; 2 -nate. Panicle axis scabrous. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic; laterally compressed; 9–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 9–10 mm long; scaberulous.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3.5 mm long; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 5 mm long; 0.7–0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.
FLORETS Fertile lemma linear, or lanceolate; 6.5–7.5 mm long; chartaceous; without keel; 5 -veined. Lemma midvein scabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1–1.5 mm long overall; deciduous. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Anthers 3; 2.5 mm long. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; sulcate on hilar side; glabrous. Hilum linear; 0.75 length of caryopsis.
DISTRIBUTION South America: southern South America.
NOTES Poeae. Turpe 1997.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
