Arctophila fulva

HABIT Perennial. Rhizomes elongated. Culms 15–80 cm long. Ligule an eciliate membrane. Leaf-blades 5–20 cm long; 2–13 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; pyramidal, or ovate; 4–17 cm long. Primary panicle branches ascending, or drooping, or reflexed. Panicle branches capillary; smooth.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear, or oblong.

FERTILE SPIKELETS Spikelets comprising 2–6 fertile florets; without rhachilla extension, or with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 2.5–7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 0.75 length of upper glume; membranous; 1-keeled; (1–)3 -veined. Lower glume apex acute. Upper glume ovate; 0.9–1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 2–4 mm long; membranous; much thinner above; yellow; keeled; lightly keeled; 3 -veined. Lemma lateral veins obscure; less than two thirds length of lemma. Lemma apex erose; acute. Palea 0.75 length of lemma; 2 -veined. Palea keels smooth. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum elliptic.

DISTRIBUTION Europe: northern and eastern. Asia-temperate: Siberia and Soviet far east. North America: Subarctic, western Canada, and eastern Canada.

NOTES Poeae. WDC.

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