Festuca bargusinensis

HABIT Perennial; caespitose. Cataphylls inconspicuous. Basal innovations intravaginal. Culms 35–45 cm long. Leaf-sheaths open for most of their length; glabrous on surface. Ligule a ciliolate membrane; 0.3 mm long. Leaf-blades filiform; conduplicate; angular in section; 15 cm long; 0.5 mm wide. Leaf-blade venation comprising 5 vascular bundles; with 7 subepidermal sclerenchyma strands; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface ribbed; scabrous; rough abaxially; puberulous; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; nodding; 6–8 cm long; 5–7 cm wide. Primary panicle branches spreading; 1–2 -nate; 3–4 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 5–10 mm long.

FERTILE SPIKELETS Spikelets comprising 2(–3) fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 6–7 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4 mm long; 0.75 length of upper glume; membranous; without keels; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 5 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.

FLORETS Fertile lemma oblong; 5 mm long; chartaceous; purple; without keel; 5 -veined. Lemma surface scabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1.2–1.6 mm long overall. Palea 4.5 mm long; 2 -veined. Palea keels scabrous.

FLOWER Anthers 3; 2 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: Siberia.

NOTES Poeae. Malysch 1995.

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