Festuca borderei

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms 10–30 cm long. Leaf-sheaths tubular for much of their length; with 0.66 of their length closed; with infolded margins; glabrous on surface. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blades straight, or curved; filiform; conduplicate; 0.6–0.85 mm wide. Leaf-blade venation comprising 5–7 vascular bundles; with 5 inner ridges; with sclerenchyma strands below veins; with subepidermal sclerenchyma attached to veins above (midrib & margins). Leaf-blade apex pungent.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; dense; 5 cm long. Panicle branches glabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets with diminished florets at the apex. Spikelets oblong; laterally compressed; 7–7.6 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 ovate; 4.3–4.9 mm long; 0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 5.2–5.8 mm long; chartaceous; without keel; 5 -veined. Lemma apex acuminate; muticous. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3; 2–2.5 mm long. Ovary glabrous.

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

DISTRIBUTION Europe: southwestern.

NOTES Poeae. Fl Eur 1995.

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