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Sporobolus junceus

Sporobolus junceus Kunth  
Family: Poaceae
Wire Grass, more...Piney-Woods Dropseed, pineywoods dropseed
[Agrostis thyrsoides Bosc ex Trin., moreAira triglumis Steud., Axonopus poiretii Roem. & Schult., Colpodium junceum (P. Beauv.) Trin., Crypsis juncea (P. Beauv.) Steud., Heleochloa juncea P. Beauv., Sporobolus ejuncidus Nash, Sporobolus gracilis Merr., Vilfa fulvescens Trin., Vilfa juncea (P. Beauv.) Trin., Vilfa schiedeana Trin., Vilfa subsetacea Trin., Vilfa vinzenti Steud.]
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Britton, N.L., and A. Brown.
  • FNA
  • Gleason & Cronquist
  • Resources
Paul M. Peterson, Stephan L. Hatch, Alan S. Weakley. Flora of North America

Plants perennial; cespitose, not rhizomatous. Culms (30)40-100 cm. Sheaths rounded below, margins and apices sometimes sparsely ciliate; ligules 0.1-0.2 mm; blades (6)10-30 cm long, 0.8-2 mm wide, flat to tightly involute, glabrous abaxially, scabridulous adaxially, margins scabrous, apices pungent. Panicles 7-28 cm long, 2-6 cm wide, open, pyramidal; lower nodes with 3 or more branches; primary branches 0.7-4.5 cm, spreading 20-100° from the rachis, whorled or verticellate, without spikelets on the lower 1/8-1/2; secondary branches appressed; pedicels 0.4-2.5 mm, appressed, scabridulous. Spikelets 2.6-3.8 mm, purplish-red. Glumes unequal, linear-lanceolate to lanceolate or ovate, hyaline to membranous; lower glumes 0.9-3 mm; upper glumes 2.6-3.8 mm, as long as or longer than the florets; lemmas 2-3.6 mm, ovate, membranous, glabrous, acute; paleas 2-3.6 mm, ovate, membranous; anthers 1.4-2 mm, purplish. Fruits 1.4-1.8 mm, ellipsoid, somewhat laterally flattened, somewhat rugulose, reddish-brown. 2n = unknown.

Sporobolus junceus grows in openings in pine and hardwood forests, coastal prairies, and pine barrens, usually in sandy to loamy soils, at 2-400 m. Its range lies entirely within the southern United States.

Vascular plants of NE US and adjacent Canada
Tufted perennial 3-10 dm, with erect slender culms; lvs 1-3 dm, very narrow, involute, crowded toward the base; panicle cylindric, 8-25 נ1-4 cm, its branches regularly whorled, spreading or ascending, 1-3 cm, racemiform, bearing scattered, ±secund, bronze-brown spikelets 2.5-3.7 mm on short (mostly under 1 mm) pedicels in the distal half; first glume lanceolate, acute or obtuse, 1.2-3 mm; second glume acute, about equaling the lemma. Pine-barrens of the coastal plain; se. Va. to Fla. and Tex. (S. gracilis)

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.
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Open Interactive Map
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© Smithsonian Institution, National Museum of Natural History, Department of Botany
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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