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Bromus tectorum L. Thatch Cheat. 
Europe. 
A gropyron violaceum (Hornem.) Vasey. Violet Wheat Grass. 
Native. 
A gropyron tenerum Vasey. Slender Wheat Grass. 
Native. 
A gropyron occidentale Scribn. Western Wheat Grass. 
Native. (Introduced from lower altitudes.) 
Hordeum jubatum L. Squirrel-tail Grass. 
Native. (Introduced from lower altitudes.) 
Hordeum sativum hexastichon (L.) Hack. Six-rowed Barley. 
Old World, thence to the New. 
Elymus canadensis Linn. Canadian Wild Rye. 
Native. (Introduced from lower altitudes.) 
JUNCACEAE 
Juncus balticus montanus Engelm. Mountain Baltic Rush. 
Native. 
POLYGONACEAE 
Rumex acetosella L. Sheep Sorrel. 
Europe: Asia, thence to North America. 
Rumex occidentalis Wats. Dense-flowered Dock. 
Native. 
Rumex crispus L. Curly Dock. 
Europe and Asia, thence to North America. 
Rumex salicifolius Weinm. Willow-leaved Dock. 
ative. 
Polygonum aviculare L. Doorweed. 
Asia: Europe: North America. 
Tintaria convolvulus (L.) Webb. & Moq. False Buckwheat. 
Europe, Asia, thence to North America. 
CHENOPODIACEAE 
Chenopodium oblongifolium (S. Wats.) Rydb. Oblong Leaveđ 
oosefoot. . 
Native. 
