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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Festuca pseudodalmatica

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms 30–50 cm long. Culm-internodes antrorsely scabrous. Leaf-sheaths open for most of their length; with 0 of their length closed; with flat margins; smooth, or scaberulous; glabrous on surface. Leaf-sheath auricles erect; obtuse. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades filiform; conduplicate; elliptic in section; 15–30 cm long; 0.4–0.7 mm wide; mid-green, or glaucous; pruinose. Leaf-blade venation comprising 5 vascular bundles; with 3 inner ridges; with 3 subepidermal sclerenchyma strands; with subepidermal sclerenchyma free from veins. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 8–15 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4–7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6.5–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume linear; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume linear; 3.4–5 mm long; 0.75–0.9 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 5–5.6 mm long; chartaceous; dark green, or glaucous; without keel; 5 -veined. Lemma surface smooth, or scaberulous. Lemma margins eciliate, or ciliolate. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 1.6–2.5 mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; ellipsoid. Hilum linear. Disseminule comprising a caryopsis and palea.

DISTRIBUTION Europe: central, southeastern, and eastern.

NOTES Poeae. Fl Eur 1995.

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