GrassBase - The Online World Grass Flora


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

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

Dupoa labradorica

HABIT Perennial; culms solitary. Rhizomes elongated. Culms erect; 15–40 cm long; 2.5–4 mm diam. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths 1.5–4 cm long; keeled. Ligule an eciliate membrane; 2.5 mm long; truncate. Leaf-blades conduplicate, or convolute; 5–15 cm long; 3–6 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear, or lanceolate; 6–12 cm long; 0.7–2 cm wide. Primary panicle branches ascending; bearing spikelets almost to the base. Panicle branches stiff; glabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 5.5–9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth; glabrous. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet; firmer than fertile lemma. Lower glume ovate; 4.5–5.5 mm long; 0.66–0.75 length of upper glume; cartilaginous; much thinner above; much thinner on margins; 1-keeled; 3 -veined. Lower glume apex acuminate. Upper glume ovate; 5–7.5 mm long; 1.25–1.5 length of adjacent fertile lemma; cartilaginous; much thinner above; with hyaline margins; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 4–5 mm long; membranous; much thinner above; keeled; 5–7 -veined. Lemma surface pubescent; hairy below. Lemma apex erose; acute. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 2 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION North America: eastern Canada.

NOTES Poeae. Fernald 1997.

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