Jack In The Pulpit
Jack-go-to-bed-at-noon
Jagged Chickweed
James River Blackberry
Japanese Barberry
Japanese Black Pine
Japanese Bristlegrass
Japanese Clover
Japanese Corktree
Japanese Holly
Japanese Honeysuckle
Japanese Hop
Japanese Knotweed
Japanese Maple
Japanese Mazus
Japanese Meadowsweet
Japanese Pachysandra
Japanese Sedge
Japanese Snowball
Japanese Yew
Java-bean
Jerusalem Artichoke
Jerusalem Oak Goosefoot
Jetbead
Jewelweed
Jimsonweed
Johnny Jumpup
Johnsongrass
Jointed Spikesedge
Jointtail Grass
Jointvetch
Jointweed
Jumpseed
Junegrass
Juniper
Juniper Leaf
Justiceweed