Hackberry
Hairgrass
Hairsedge
Hairy Beardtongue
Hairy Bedstraw
Hairy Crabgrass
Hairy Forked Nailwort
Hairy Goldenrod
Hairy Lespedeza
Hairy Lettuce
Hairy Pinweed
Hairy Purslane Speedwell
Hairy Sedge
Hairy Small-leaf Ticktrefoil
Hairy Smotherweed
Hairy White Oldfield Aster
Hairy Wildrye
Hairy Woodland Brome
Hairyfruit Chervil
Hairystem Gooseberry
Halberdleaf Tearthumb
Halfchaff Sedge
Handsome Harry
Hard Fescue
Hardstem Bulrush
Harlequin Blueflag
Hawkbit
Hawksbeard
Hawkweed
Hawkweed Oxtongue
Hawthorn
Hay Sedge
Hayscented Fern
Hazel Alder
Hazel Dodder
Hazelnut
Heartleaf Foamflower
Heartleaf Twayblade
Heather
Hedge False Bindweed
Hedgehyssop
Hedgemustard
Hedgenettle
Heliopsis
