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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Festuca staroplaninica

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms erect; 40–80 cm long. Culm-internodes smooth. Leaf-sheaths open for most of their length; with 0.25 of their length closed; glabrous on surface. Leaf-sheath auricles erect. Ligule a ciliolate membrane. Leaf-blades filiform; conduplicate; 0.5–0.9 mm wide. Leaf-blade venation comprising 7–11 vascular bundles; with 5–7 inner ridges; with sclerenchyma strands below veins; with 5–7 subepidermal sclerenchyma strands; with subepidermal sclerenchyma free from veins; without layer of subepidermal sclerenchyma masking vein striation.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth, or scaberulous above.

Panicle open; oblong; 5–14 cm long; contracted about primary branches. Panicle axis scaberulous. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4–8 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 7.5–14 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; chartaceous; without keels; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 4.1–5.7 mm long; 0.8–0.9 length of adjacent fertile lemma; chartaceous; with hyaline margins; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 4.2–7 mm long; chartaceous; without keel; 5 -veined. Lemma surface pubescent. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2.7–4.5 mm long overall; 0.5 length of lemma. Apical sterile florets resembling fertile though underdeveloped.

CLEISTOGENES AND VIVIPARY Vegetative proliferation absent, or occurs.

DISTRIBUTION Europe: southeastern.

NOTES Poeae. Velcher 2005.

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