GENUS NAME:

a

b

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d

e

f

g

h

i

j

k

l

m

n

o

p

q

r

s

t

u

v

w

x

y

z

Obregonia

1 type

Ochagavia

2 types

Ochna

1 type

Ocimum

33 types

Odontonema

3 types

Oemleria

1 type

Oenanthe

1 type

Oenothera

46 types

Olea

27 types

Olearia

22 types

Olneya

1 type

Olsynium

1 type

Omphalodes

9 types

Onoclea

3 types

Ononis

2 types

Onosma

3 types

Onychium

3 types

Ophiopogon

37 types

Oplismenus

1 type

Oplopanax

2 types

Opopanax

1 type

Opuntia

207 types

Oraniopsis

1 type

Orbea

4 types

Orbexilum

1 type

Oreocereus

5 types

Oreostemma

1 type

Oresitrophe

1 type

Origanum

40 types

Orixa

2 types

Orlaya

1 type

Ornduffia

1 type

Ornithogalum

18 types

Orobanche

1 type

Orostachys

7 types

Oroya

2 types

Orphium

1 type

Orthocohnia

1 type

Orthophytum

7 types

Orthosiphon

3 types

Oryza

1 type

Oryzopsis

1 type

Oscularia

3 types

Osmanthus

28 types

Osmoxylon

1 type

Osmunda

7 types

Osteospermum

20 types

Ostrya

3 types

Ostryopsis

1 type

Otatea

2 types

Othonna

2 types

Otomeria

1 type

Ourisia

3 types

Oxalis

73 types

Oxydendrum

1 type

Oxypetalum

1 type

Oxytheca

1 type

Oxytropis

1 type

Ozothamnus

10 types