To view a larger image of each plant, click on the respective plant thumbnail image. Many thanks to those individuals and groups that have made images available for display in this list. Photo credits list.

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Moraceae Morus rubra Sites: 17 Oleaceae Fraxinus americana Sites: 6, 7, 13, 17, 11, 14, 15 Oleaceae LIGUSTRUM VULGARE Sites: 13, 11, 15

Onagraceae Circaea alpina Sites: 7 Onagraceae Circaea lutetiana Sites: 7, 13, 17, 11, 14, 15

Onagraceae Epilobium coloratum Sites: 13, 17, 11, 14, 15 Onagraceae Gaura biennis Sites: 13, 14, 15 Onagraceae LUDWIGIA PALUSTRIS Sites: 6, 13, 14

Onagraceae Oenothera biennis Sites: 6, 7, 13, 17, 11, 14, 15 Onagraceae Oenothera perennis Sites: 7 Ophioglossaceae Botrychium dissectum Sites: 17

Ophioglossaceae Botrychium virginianum Sites: 7, 13 Orchidaceae EPIPACTIS HELLEBORINE Sites: 6, 7, 11 Orobanchaceae Epifagus virginiana Sites: 17

Osmundaceae Osmunda cinnamomea Sites: 6, 7 Osmundaceae Osmunda claytoniana Sites: 17 Oxalidaceae Oxalis montana Sites: 6

Oxalidaceae Oxalis stricta Sites: 6, 7, 13, 17, 11, 14, 15, 12 Oxalidaceae Oxalis violacea Sites: 13 Papaveraceae CHELIDONIUM MAJUS Sites: 11, 14, 15

Papaveraceae Sanguinaria canadensis Sites: 13, 11, 15 Phytolaccaceae Phytolacca americana Sites: 11, 14 Pinaceae PICEA ABIES Sites: 14

Pinaceae Pinus resinosa Sites: 17 Pinaceae Pinus strobus Sites: 6, 7, 17, 14, 15 Pinaceae Tsuga canadensis Sites: 6, 7, 13, 17, 11, 15, 12

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