Festuca trollii

HABIT Perennial; caespitose. Culms 50–100 cm long. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades conduplicate; 30 cm long; 1 mm wide. Leaf-blade surface scaberulous; rough abaxially; hirsute; hairy adaxially. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear; 15–30 cm long. Primary panicle branches appressed; 5–7 cm long. Panicle branches pubescent.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–9 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 9.5–17 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4–7 mm long; 0.66–0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous; rough above. Lower glume apex acute. Upper glume lanceolate; 6–8.5 mm long; 0.9 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume surface scabrous; rough above. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 6.7–9 mm long; chartaceous; without keel; 5 -veined. Lemma surface puberulous, or pubescent; hairy above. Lemma apex acute; mucronate. Palea 1 length of lemma; 2 -veined. Palea surface pubescent; hairy above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3; 2.5–3.5 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION South America: western South America.

NOTES Poeae. Gr Bolivia 1997.

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