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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 summilusitanica
HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm. Basal innovations intravaginal. Culms erect; 18–57 cm long; 1 -noded. Lateral branches lacking. Leaf-sheaths tubular for much of their length; with 0.5–0.66 of their length closed; 5.6–6.7 cm long; pilose. Leaf-sheath auricles erect; 0.2–0.3 mm long. Ligule a ciliolate membrane; 0.2–0.25 mm long; truncate. Leaf-blades filiform; conduplicate; elliptic in section; 7–29 cm long; 2 mm wide. Leaf-blade venation comprising 7 vascular bundles; with continuous uniform subepidermal sclerenchyma layer on the underside. Leaf-blade surface puberulous. Leaf-blade apex acute.
INFLORESCENCE Inflorescence a panicle; comprising 12–34 fertile spikelets. Peduncle antrorsely scabrous above.
Panicle contracted; lanceolate; 3.5–10 cm long. Primary panicle branches simple; 1–4.5 cm long. Panicle axis angular; scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.8–1.1 mm long.
FERTILE SPIKELETS Spikelets comprising 4–7 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 5–9 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate; 2–4 mm long; 0.7–0.8 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate, or ovate; 3–5 mm long; 0.75–0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume surface scabrous; rough at apex. Upper glume apex acute.
FLORETS Fertile lemma lanceolate, or oblong; 4–7 mm long; chartaceous; without keel; 5 -veined. Lemma midvein scabrous. Lemma surface scabrous; rough above. Lemma apex acute; awned; 1 -awned. Principal lemma awn 0.8–2.4 mm long overall. Palea oblong; 3.5–5.5 mm long; 2 -veined. Palea keels scabrous. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; oblong; 0.9–1 mm long. Anthers 3; 1.6–3.6 mm long. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; 2.8–3.5 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.
