Eriochloa villosa (Thunb.) Kunth
Family: Poaceae
Eriochloa villosa image
Morton Arboretum  

Plants annual. Culms 30-100 cm, erect or decumbent, sometimes rooting at the lower nodes; nodes and internodes pubescent. Sheaths sometimes inflated, glabrous or pubescent; ligules 0.5-1 mm; blades 10-20 cm long, 5-12 mm wide, flat, adaxial surfaces hairy. Panicles 3-16 cm long, 1-3 cm wide; rachises villous; branches 2-8, 20-70 mm long, 0.8-1.1 mm wide, velutinous, sometimes winged, with 11-24 solitary spikelets (occasionally paired proximally); pedicels 0.5-1 mm, densely villous below, often with long hairs intermixed with the short hairs, apices with more than 12 hairs of 1.5-2.5 mm. Spikelets 3.9-5.2 mm long, 2-2.5 mm wide, ovate to elliptic. Lower glumes occasionally present as a scale; upper glumes equaling the lower lemmas, ovate to elliptic, glabrous or pubescent, 7-veined; lower lemmas 3.4-5 mm long, 2-2.5 mm wide, 5-veined, acute to apiculate, unawned; lower paleas absent; anthers absent; upper lemmas 3.5-5 mm, ovate to elliptic, acute to apiculate. 2n = 54.

Eriochloa villosa is a weedy species of eastern Asia that has been found at scattered locations in the Flora region

Annual herb 30 cm - 1 m tall Leaves: alternate, two-ranked. Sheaths open, sometimes inflated, sometimes hairy. Ligules 0.5 - 1 mm long, membranous, fringed with hairs. Blades 10 - 20 cm long, 5 - 12 mm wide, linear to lance-shaped, flat, hairy above, parallel-veined. Inflorescence: a terminal, branched arrangement of spikelets (panicle), 3 - 16 cm long, 1 - 3 cm wide, spike-like, on an elongate and hairy axis. Branches two to eight, 2 - 7 cm long, to 1 mm wide, sometimes winged, velvety hairy, bearing eleven to twenty-four spikelets. Fruit: a caryopsis, indehiscent, enclosed within the persistent lemma and palea. Culm: upright or decumbent, 30 cm - 1 m long, round in cross-section, sometimes rooting at the lower nodes, sometimes hairy. Nodes two to five. Spikelets: solitary (sometimes paired), stalked, 4 - 5 mm long, 2 - 2.5 mm wide, egg-shaped to elliptic. Florets: two per spikelet. Lower florets sterile. Upper florets bisexual. Lodicules two, papery. Anthers three. Styles two-branched, purple, with feather-like hairs. Stigmas red. Glumes:: Lower glumes sometimes represented as a scale. Upper glumes equal to lower lemmas, egg-shaped to elliptic, seven-veined, sometimes hairy. Lemmas:: Lower lemmas similar to upper glumes in size, shape, and texture, 3.5 - 5 mm long, 2 - 2.5 mm wide, pointed at the apex, five-veined. Upper lemmas 3.5 - 5 mm long, egg-shaped to elliptic with a pointed apex, rounded at the back, hardened, wrinkled, with rolled-up margins. Paleas:: Lower paleas absent.

Similar species: No information at this time.

Flowering: August to early September

Habitat and ecology: Introduced from Asia. Found in disturbed areas such as cultivated fields and along railroads.

Occurence in the Chicago region: non-native

Etymology: Eriochloa comes from the Greek words erion, meaning wool, and chloe, meaning grass, referring to the usually hairy spikelet axes and flower stalks. Villosa means soft-hairy.

Author: The Morton Arboretum

Rather coarse, leafy-stemmed annual to 1 m, erect from a decumbent base; lvs flat, 6-15 mm wide, inconspicuously puberulent; racemes several, appressed-erect, 2-5 cm, overlapping, the rachis densely spreading-villous, the short pedicels beset with longer hairs 1.5-3 mm; spikelets borne singly at the nodes of the infl-branches, or paired only at the base, 4.5-5 mm, the second glume and sterile lemma about equal, pointed but scarcely acuminate; fertile lemma obscurely mucronulate or muticous; 2n=54. Native of e. Asia, intr. and becoming established in Ill., Io., Nebr., and Kans.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Mona Terwedow  
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image
Mona Terwedow  
Eriochloa villosa image
Eriochloa villosa image
Eriochloa villosa image