Lolium persicum

Boiss. & Hohen.
Common names: Persian darnel
Treatment appears in FNA Volume 24. Treatment on page 459.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants annual. Culms 14-45(60) cm. Blades 3.5-20 cm long, 1.5-7 mm wide. Spikes 3-21 cm, with 3-12 spikelets; rachises 0.5-2 mm thick at the nodes, often flexuous, spikelets not sunken in the rachises, not concealed by the glumes. Spikelets 9-27 mm long, 1.5-7 mm wide, with 4-9 florets. Glumes (4.7)7.5-23 mm, from 2/3 as long as to equaling the distal florets, somewhat indurate; lemmas (5.2)7-12 mm long, 1.5-2.7 mm wide, awns (1.5)5-18 mm, attached 0.2-1 mm below the apices; paleas usually 0.5-1.8 mm longer than the lemmas; anthers 1.5-3 mm. Caryopses 4.8-7 mm long, 1.2-2 mm wide, 3.7-5 times longer than wide. 2n = 14.

Distribution

Colo., N.Y., Mo., N.Dak., Mont., Wyo., Alta., B.C., Man., Ont., Que., Sask.

Discussion

Lolium persicum, a native of southwest Asia, has been found as a weed in grain fields and waste places in southern Canada, Montana, North Dakota, and Wyoming and, as an adventive, in New York and Missouri. It is now one of the top ten weeds of western Canadian cereal crops. It first became established in North America in Cavalier County, North Dakota, prior to 1910 (Dore 1950).

Selected References

None.

Lower Taxa

None.