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.

Muhlenbergia schmitzii

HABIT Annual. Culms erect; robust; 30–80 cm long. Culm-internodes 3.7–10.7 cm long; scaberulous. Lateral branches sparse. Leaf-sheaths 2.5–10 cm long; mostly shorter than adjacent culm internode; scaberulous. Ligule an eciliate membrane; 2–3 mm long; hyaline; erose, or lacerate; truncate, or obtuse. Leaf-blades 5–20 cm long; 1.6–5 mm wide. Leaf-blade midrib conspicuous. Leaf-blade venation prominent. Leaf-blade surface smooth, or scaberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate, or elliptic; 12–36 cm long; 3–14 cm wide; contracted about primary branches. Primary panicle branches ascending, or spreading; 1–2 -nate; 1.2–8 cm long. Panicle axis 19–46 noded. Panicle branches capillary.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels 1.5 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.6–3.2 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate, or ovate; 1.3–2.1 mm long; 1 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous; glabrous, or puberulous; hairy at apex. Lower glume apex attenuate; awned; 1 -awned. Lower glume awn 0.5–0.8 mm long. Upper glume oblong; 1.3–2.1 mm long; 0.5–0.66 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume surface asperulous; glabrous, or puberulous; hairy at apex. Upper glume apex dentate; 2–3 -fid; awned; 1 -awned. Upper glume awn 0.5–0.8 mm long.

FLORETS Fertile lemma elliptic, or oblong; 2.6–3.2 mm long; membranous; light brown; without keel; 3 -veined. Lemma midvein pubescent. Lemma lateral veins prominent. Lemma margins pubescent. Lemma apex entire, or erose; obtuse, or acute; muticous, or pungent. Palea elliptic, or oblong; 2.7–3.4 mm long; 1.1 length of lemma; 2 -veined. Palea apex dentate; 2 -fid.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 0.9–1.6 mm long; purple.

FRUIT Caryopsis with adherent pericarp; oblong; 1.1–3 mm long; light brown.

DISTRIBUTION North America: Mexico.

NOTES Eragrostideae. Fl Nov Gal 1994.

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