Umbrella Flatsedge
Umbrella-tree
Unicorn-plant
Upland Bentgrass
Upland Blackberry
Upland Boneset
Upland Brittle Bladderfern
Upland Dewberry
Upland Highbush Blueberry
Upright Burhead
Upright Carrionflower
Upright Prairie Coneflower
Upright Sedge