Festuca chasii

HABIT Perennial; caespitose. Basal innovations intravaginal. Culms erect; 20–60 cm long. Lateral branches lacking. Leaf-sheaths open for most of their length. Ligule an eciliate membrane. Leaf-blades filiform; conduplicate; angular in section, or elliptic in section; 10–20 cm long; 1–2 mm wide; mid-green, or glaucous. Leaf-blade venation comprising 7–9 vascular bundles; with 3(–7) inner ridges; with 3–5 subepidermal sclerenchyma strands; without layer of subepidermal sclerenchyma masking vein striation, or with sclerenchyma strands widened to form a discontinuous subepidermal layer. Leaf-blade surface scaberulous; pubescent; hairy adaxially. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 1.5–8 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–7 fertile florets; with diminished florets at the apex. Spikelets elliptic, or oblong; laterally compressed; 6–7 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate, or ovate; chartaceous; without keels; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3.5–5 mm long; chartaceous; without keel; 5 -veined. Lemma surface glabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1–1.5 mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Europe: southwestern.

NOTES Poeae. Portal 2001.

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