Ranunculus parviflorus (smallflower buttercup)

Isoetes x foveolata
Isotria medeoloides (small whorled pogonia)
Isotria verticillata (large whorled pogonia)
Israel
Italy
Itea virginica (Virginia sweetspire)
Jamaica
Jan Mayen
Japan
Jasione montana
Jasminum nudiflorum
Jasminum polyanthum
Jeffersonia diphylla (twinleaf)
Jersey
Jordan
Juglans regia
Juncus acuminatus (tapertip rush)
Juncus alpinoarticulatus ssp. nodulosus (northern green rush
Juncus arcticus ssp. littoralis (mountain rush)
Juncus articulatus (jointleaf rush)
Juncus biflorus (bog rush)
Juncus biglumis (twoflowered rush)
Juncus brachycarpus (whiteroot rush)
Juncus brachycephalus (smallhead rush)
Juncus brevicaudatus (narrowpanicle rush)
Juncus bulbosus (bulbous rush)
Juncus caesariensis (New Jersey rush)
Juncus castaneus (chestnut rush)
Juncus compressus

Image of Ranunculus parviflorus (smallflower buttercup) 1
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 2: 114.