Vascular Plants

Includes all flowering plants, conifers, ferns and fern-allies.


Browse by genus:

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
Genus names beginning with O:
27 genera
60 species
20 subspecies and varieties
Show only taxa with photos
Odontites (1 species)
Oemleria (1 species)
Oenanthe (1 species)
Oenothera (8 species)
Olsynium (1 species)
Onobrychis (1 species)
Ononis (1 species)
Onopordum (1 species)
Ophioglossum (1 species)
Oplopanax (1 species)
Opuntia (2 species)
Oreopteris (1 species)
Oreostemma (1 species)
Origanum (1 species)
Ornithogalum (2 species)
Orobanche (1 species)
Orthilia (1 species)
Orthocarpus (5 species)
Oryzopsis (1 species)
Osmorhiza (4 species)
Osmunda (1 species)
Oxalis (7 species)
Oxybasis (4 species)
Oxyria (1 species)
Oxytheca (1 species)
Oxytropis (3 species)
Ozomelis (3 species)