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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 rivasmartinezii
HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm. Basal innovations intravaginal. Culms erect; 7–40 cm long; 2–3 -noded; with 0.25 of their length below uppermost node. Culm-internodes distally glabrous. Lateral branches lacking. Leaf-sheaths open for most of their length; with 0.25 of their length closed; glabrous on surface. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles erect. Ligule an eciliate membrane; 0.2 mm long; truncate. Leaf-blades curled; filiform; conduplicate; elliptic in section; 3–20 cm long; 1 mm wide; glaucous. Leaf-blade venation comprising 7–9 vascular bundles; with sclerenchyma strands widened to form a discontinuous subepidermal layer. Leaf-blade margins scabrous; glabrous. Leaf-blade apex obtuse.
INFLORESCENCE Inflorescence a panicle; comprising 10–47 fertile spikelets.
Panicle contracted; linear; 3–8 cm long. Primary panicle branches simple; 1.8–3 cm long.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 3–8 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate; 1.2–2.3 mm long; 0.6–0.7 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous; rough at apex. Lower glume apex acute. Upper glume lanceolate, or oblong; 2–3.3 mm long; 0.7–0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume surface scabrous; rough at apex. Upper glume apex acute.
FLORETS Fertile lemma lanceolate; 3–4 mm long; chartaceous; without keel; 5 -veined. Lemma margins scaberulous. Lemma apex acute; awned; 1 -awned. Principal lemma awn 0.5–1.4 mm long overall. Palea lanceolate; 2.5–3.9 mm long; 2 -veined. Palea keels scabrous. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2. Anthers 3. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; 2–2.5 mm long. Hilum linear.
DISTRIBUTION Europe: southwestern.
NOTES Poeae. Fuente 2001.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
