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Aegilops triuncialis L.  
Family: Poaceae
Barbed Goat Grass, more...Barbed Goatgrass
[Aegilops croatica Gand., moreAegilops echinata C. Presl, Aegilops elongata Lam., Aegilops nigricans Jord. & Fourr., Aegilops ovata subsp. triaristata (Willd.) Rouy, Aegilops ovata var. triaristata (Willd.) Bluff ex Nees, Aegilops persica Boiss., Aegilops squarrosa subsp. squarrosa (L.) Kihara & Tanaka, Aegilops squarrosa var. typica Eig, not validly publ., Aegilops triuncialis subsp. orientalis Eig, Aegilops triuncialis var. persica , Aegilops triuncialis var. triuncialis , Aegilops triuncialis var. typica Eig, not validly publ., Triticum persicum Aitch, & Hemsi., Triticum triunciale Rasp., Triticum trunciale (L.) Raspail]
Aegilops triuncialis image
Steve Hurst
  • FNA
  • Resources
Sandra M. Saufferer. Flora of North America

Culms 17-60 cm, geniculate to semiprostrate at the base, usually with several tillers. Sheaths with hyaline margins, lower cauline sheath margins usually ciliate; blades 1.5-7 cm long, 2-3 mm wide. Spikes 2.2-6 cm long, 0.4-0.5 cm wide, narrowly ellipsoid at the base, subcylindrical distally, with 2-7 fertile spikelets; rudimentary spikelets (2)3; disarticulation at the base of the spikes. Lower fertile spikelets 7-13 mm, lanceolate-ovate, with 3-5 florets, first 1-2 florets fertile; upper spikelets 7-9 mm, reduced. Glumes of lower spikelets 6-10 mm, 2-3-awned, awns 2.5-6 cm, glabrous, scabrous, or velutinous, if 3-awned the central awn often shorter than the lateral awns, sometimes reduced to a tooth; glumes of apical spikelets 6-8 mm, 3-awned, central awns 2.5-8 cm, longer than the lateral awns; lemmas 7-11 mm, with 2-3 teeth, if 3-toothed the central tooth the longest, sometimes extending into an up to 10 mm awn. Caryopses 5-8 mm, falling free from the lemmas and paleas. Haplomes UC. 2n = 28.

North American collections of Aegilops triuncialis are from disturbed sites, mostly roadsides and railroads, in California and western Nevada. The native range of the species extends from the Mediterranean area east to central Asia and south to Saudi Arabia. Specimens from the Flora region belong to Aegilops triuncialis var. triuncialis, which has apical spikelets with 5-8 cm central awns on the glumes and 2 well-developed 1-3 cm lateral awns, and lateral spikelets with 2-3 well-developed 1.5-6 cm awns. It differs from A. triuncialis var. persica (Boiss.) Eig, which has apical spikelets with 2-5 cm central awns on the glumes and 2 lateral awns of 1-2 cm, sometimes reduced to teeth, and lateral spikelets with 1 awn to 1.5 cm and 1-2 teeth.

Aegilops triuncialis
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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