Festuca thracica

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms 30–57 cm long. Culm-internodes smooth. Leaf-sheaths open for most of their length; with 0 of their length closed; with flat margins; antrorsely scabrous; glabrous on surface. Leaf-sheath auricles erect; obtuse. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades filiform; conduplicate; circular in section; 0.4–0.65 mm wide; glaucous. Leaf-blade venation comprising 7 vascular bundles; with 3 inner ridges; with subepidermal sclerenchyma free from veins; with sclerenchyma strands widened to form a discontinuous subepidermal layer. Leaf-blade surface scabrous. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence a panicle.

Panicle open; loose; 6–9 cm long. Panicle branches pubescent.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 8.4–8.5 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 lanceolate; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3.9–6.2 mm long; 0.7–0.9 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume margins ciliate. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 5.5–6.7 mm long; chartaceous; mid-green; without keel; 5 -veined. Lemma surface pubescent; hairy above. Lemma margins ciliate. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 3.6–4.4 mm long overall; 0.66 length of lemma. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3. Ovary glabrous.

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

DISTRIBUTION Europe: southeastern.

NOTES Poeae. Fl Eur 1995.

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