Poaceae
Festuca

Festuca × pachyphylla Degen ex Nyár.

First published in Contr. Bot. Cluj 1962: 146 (1963)
This hybrid is accepted
The native range of this hybrid is S. Carpathians. It is a perennial and grows primarily in the temperate biome. The hybrid formula is F. glauca × F. rupicola.

Descriptions

Morphology General Habit
Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms 27-54 cm long. Culm-internodes smooth, or scaberulous. Leaf-sheaths open for most of their length; with 0-0.33 of their length closed; with flat margins; glabrous on surface, or pubescent. Leaf-sheath auricles erect; obtuse. Ligule an eciliate membrane. Leaf-blades filiform; conduplicate; elliptic in section; 0.9-1 mm wide; glaucous; without exudate. Leaf-blade midrib keeled beneath. Leaf-blade venation comprising 7-9 vascular bundles; with 3-5 inner ridges; with 5 subepidermal sclerenchyma strands; with subepidermal sclerenchyma strands unequal in size; with subepidermal sclerenchyma free from veins; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface smooth. Leaf-blade apex obtuse.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; dense; 5.5-8 cm long. Panicle branches puberulous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 8.1-9.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas.
Fertile
Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 8.1-9.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas.
Morphology Reproductive morphology Inflorescences Bracts Glume
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; 4-5.1 mm long; 0.75 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 5.4-6.5 mm long; chartaceous; glaucous, or purple; suffused with last colour; without keel; 5 -veined. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2-3 mm long overall; 0.33-0.5 length of lemma. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid. Hilum linear. Disseminule comprising a caryopsis and palea.
Distribution
Europe: southeastern.
Reference
Poeae. Fl Eur 1995.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0