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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 lanatifolia

HABIT Perennial. Rhizomes short. Culms erect; 70–80 cm long; 4 -noded. Culm-internodes antrorsely scabrous. Leaf-sheaths open for most of their length; scaberulous; glabrous on surface. Ligule an eciliate membrane; 1–1.5 mm long; truncate. Leaf-blades flat, or conduplicate; 25–50 cm long; 3–4 mm wide; 7 cm long at summit of culm; coriaceous. Leaf-blade surface pubescent; densely hairy; hairy adaxially. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 20–23 cm long. Primary panicle branches ascending; 5–9 cm long. Panicle branches capillary; scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.

FERTILE SPIKELETS Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 11–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5–2 mm long; scaberulous.

GLUMES Glumes persistent; similar; with lower narrower than upper; shorter than spikelet. Lower glume lanceolate; 3.8–4 mm long; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface puberulous; hairy above. Lower glume apex acute. Upper glume lanceolate; 5–5.5 mm long; 0.7–0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume surface puberulous; hairy above. Upper glume apex acute.

FLORETS Fertile lemma oblong; 6.5–7 mm long; chartaceous; without keel; 5 -veined. Lemma surface puberulous; hairy above. Lemma apex dentate; 2 -fid; acute; awned; 1 -awned. Principal lemma awn from a sinus; 2.4–2.8 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels scabrous. Palea surface pubescent; hairy above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 3–3.5 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION South America: western South America.

NOTES Poeae. Gr Peru 1995.

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