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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Danthonia parryi
HABIT Perennial; caespitose. Butt sheaths papery; persistent and investing base of culm. Culms 30–60 cm long; disarticulating at the nodes. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs. Collar pubescent. Leaf-blades straight, or flexuous; deciduous at the ligule; filiform, or linear; flat, or involute; 15–25 cm long; 1–2 mm wide.
INFLORESCENCE Inflorescence a panicle; comprising 3–8 fertile spikelets.
Panicle open; ovate; 3–7 cm long; bearing few spikelets. Primary panicle branches ascending; 1–2 cm long; bearing 1–2 fertile spikelets on each lower branch. Panicle branches pubescent.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 20–27 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pilose.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 20–27 mm long; 1 length of upper glume; membranous; without keels; 3–5 -veined. Lower glume lateral veins with cross-veins. Lower glume apex acute. Upper glume lanceolate; 20–27 mm long; 2 length of adjacent fertile lemma; membranous; without keels; 3–5 -veined. Upper glume lateral veins with cross-veins. Upper glume apex acute.
FLORETS Fertile lemma elliptic; 10 mm long; chartaceous; without keel; 5 -veined. Lemma surface pilose. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 10–14 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 2 mm long; shorter than principal. Palea 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; cuneate; fleshy; glabrous. Anthers 3.
FRUIT Caryopsis with adherent pericarp. Hilum linear.
CLEISTOGENES AND VIVIPARY Cleistogenes present; in lower sheaths.
DISTRIBUTION North America: western Canada, northwest USA, and south-central USA.
NOTES Arundineae. Man US Gr 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
