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Family	Scientific Name	Common Name	Habitat	Distribution	Image
Poaceae	Hordeum brachyantherum	Meadow Barley	Disturbed areas, probably only a waif in our area.	Native of w. North America and ne. Asia. Reported for se. PA (Rhoads & Klein 1993) and also apparently known from specimens from GA (Sorrie, pers. comm.), and scattered sites elsewhere in our area.
Poaceae	Hordeum depressum	Low Barley	Waste areas around wool-combing mills.	Native of w. North America, probably only a waif.
Poaceae	Hordeum jubatum ssp. intermedium	Bobtail Barley	Disturbed areas.	Native of Eurasia.
Poaceae	Hordeum jubatum ssp. jubatum	Foxtail Barley, Squirreltail Barley	Roadsides, other disturbed areas.	Native of w. North America, apparently introduced in most of our our area (at least eastwards). Widespread in western North America, the eastern limit of nativity uncertain, perhaps to WI, IL, MO, AR, and TX.
Poaceae	Hordeum marinum ssp. gussoneanum	Seaside Barley, Mediterranean Barley	Waif on ballast at old ports, other disturbed areas.	Native of Mediterranean Europe.
Poaceae	Hordeum marinum ssp. marinum	Seaside Barley	Disturbed areas, apparently just a waif in our area.	Native of Eurasia.
Poaceae	Hordeum murinum ssp. glaucum	Wall Barley, Smooth Barley	Disturbed areas.	Native of the e. Mediterranean region.
Poaceae	Hordeum murinum ssp. leporinum	Mouse Barley	Disturbed areas.	Native of Mediterranean Europe.
Poaceae	Hordeum murinum ssp. murinum	Wall Barley, Way Barley, Farmer's Foxtail	Disturbed areas, on ballast.	Native of Europe.
Poaceae	Hordeum pusillum	Little Barley	Roadsides, fields, pastures, ditches, disturbed areas.	Probably restricted to west of the Mississippi River a few centuries ago, but now present (and in many areas common) throughout a broad portion of the United States, from ME west to WA south to n. FL, s. TX, CA, and Mexico.
Poaceae	Hordeum vulgare	Barley	Cultivated fields, commonly cultivated, rare as a waif.	Native of Eurasia.