GENUS NAME:

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

Obregonia
Obregonia

1 type

Ochagavia
Ochagavia

2 types

Ochna
Ochna

1 type

Ocimum
Ocimum

33 types

Odontarrhena

1 type

Odontonema
Odontonema

3 types

Oemleria
Oemleria

1 type

Oenanthe

1 type

Oenothera
Oenothera

49 types

Olea
Olea

32 types

Olearia
Olearia

24 types

Olneya
Olneya

1 type

Olsynium
Olsynium

1 type

Omphalodes
Omphalodes

9 types

Onoclea
Onoclea

3 types

Ononis
Ononis

2 types

Onosma
Onosma

3 types

Onychium
Onychium

3 types

Operculicarya
Operculicarya

3 types

Ophiopogon
Ophiopogon

38 types

Oplismenus
Oplismenus

1 type

Oplopanax
Oplopanax

2 types

Opopanax
Opopanax

1 type

Opuntia
Opuntia

238 types

Oraniopsis
Oraniopsis

1 type

Orbea
Orbea

4 types

Orbexilum
Orbexilum

1 type

Oreocereus
Oreocereus

5 types

Oreostemma
Oreostemma

1 type

Oresitrophe

1 type

Origanum
Origanum

41 types

Orixa
Orixa

2 types

Orlaya
Orlaya

1 type

Ornduffia

1 type

Ornithogalum
Ornithogalum

18 types

Ornithostaphylos

1 type

Orobanche
Orobanche

1 type

Orostachys
Orostachys

7 types

Oroya
Oroya

2 types

Orphium
Orphium

1 type

Ortegocactus
Ortegocactus

1 type

Orthocohnia

1 type

Orthophytum
Orthophytum

7 types

Orthosiphon
Orthosiphon

3 types

Orthrosanthus
Orthrosanthus

2 types

Oryza
Oryza

1 type

Oryzopsis

1 type

Oscularia
Oscularia

4 types

Osmanthus
Osmanthus

33 types

Osmorhiza

1 type

Osmoxylon
Osmoxylon

1 type

Osmunda
Osmunda

7 types

Osmundastrum
Osmundastrum

1 type

Osteospermum
Osteospermum

20 types

Ostrya
Ostrya

3 types

Ostryopsis

1 type

Otatea
Otatea

2 types

Othonna
Othonna

2 types

Otomeria
Otomeria

1 type

Ourisia
Ourisia

3 types

Oxalis
Oxalis

73 types

Oxydendrum
Oxydendrum

1 type

Oxypetalum
Oxypetalum

1 type

Oxytheca
Oxytheca

1 type

Oxytropis
Oxytropis

1 type

Ozothamnus
Ozothamnus

10 types