Festuca brigantina

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms 25–40 cm long. Culm-internodes smooth, or scaberulous. Leaf-sheaths open for most of their length; with 0.33–0.5 of their length closed; with flat margins; smooth, or antrorsely scabrous; glabrous on surface. Leaf-sheath auricles erect; obtuse. Ligule an eciliate membrane. Leaf-blades curved; filiform; conduplicate; circular in section; 0.5–0.75 mm wide; stiff; glaucous. Leaf-blade venation comprising 5–7 vascular bundles; with 1 inner ridges; with subepidermal sclerenchyma free from veins; with sclerenchyma strands widened to form a discontinuous subepidermal layer, or with continuous uniform subepidermal sclerenchyma layer on the underside. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence a panicle.

Panicle open; dense; 5–7.5 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 8–8.5 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 ovate; 4–4.3 mm long; 0.75 length of adjacent fertile lemma; chartaceous; with scarious margins; without keels; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 5.5–6 mm long; chartaceous; glaucous and purple; suffused with last colour; without keel; 5 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1.6–1.7 mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3.

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.