1000+ Plants That Start With O (Complete List)

Plants That Start With O

Plants are incredibly diverse, with thousands of species that have adapted to a wide range of environmental conditions, from arid deserts to humid rainforests. Below is the list of plants starting with O.

Plants That Start With O

• Ozothamnus
• Oxypetalum
• Oxydendrum
• Oxford Ragwort
• Ourisia
• Othonna
• Ostrya
• Osteospermum
• Osteomeles
• Osmarea
• Osmanthus
• Osier
• Osbeckia
• Osage Orange
• Osage
• Orychophragmus
• Orthrosanthus
• Orthophytum
• Ortegocactus
• Oroya
• Orostachys
• Ornithogalum
• Orixa
• Oreocereus
• Orbeopsis
• Orbea
• Orange Milkweed
• Orange Coneflower
• Orange
• Oplismenus
• Ophthalmophyllum
• Oophytum
• Onosma
• Onopordum
• Onoclea
• Onion
• Omphalogramma
• Olsynium
• Olneya
• Oemleria
• Odontonema
• Ocimum
• Ochna
• Ochagavia
• Obregonia

All Trees and Plants Beginning With O

Plants That Start With OA

1. oak
2. oak tree
3. oakleaf goosefoot
4. oat

Plants That Start With OC

1. ochna serrulata
2. ocimum
3. ocotillo
4. oca
5. ochroma
6. ochna
7. ochnaceae
8. ochroma lagopus
9. ocimum basilicum
10. oconee bells
11. ochna family

Plants That Start With OB

1. obovate leaf
2. oblong woodsia
3. obeche
4. obtuse leaf
5. oblong leaf
6. oblanceolate leaf
7. obedience plant
8. obedient plant
9. obechi

Plants That Start With OD

1. odontoglossum

Plants That Start With OS

1. ostrya carpinifolia
2. oswego tea
3. osmanthus
4. osmunda clatonia
5. ostryopsis
6. ostrich fern
7. ostiole
8. ostrya
9. ostrya virginiana
10. osmund
11. osage orange
12. osmanthus americanus
13. osmunda cinnamonea
14. osmunda regalis
15. osmundaceae
16. osier

Plants That Start With OF

1. offset

Plants That Start With OH

1. ohio buckeye
2. ohio goldenrod

Plants That Start With OE

1. oenanthe
2. oenothera
3. oenothera fruticosa
4. oenanthe crocata
5. oenanthe aquatica
6. oenothera macrocarpa
7. oenothera biennis

Plants That Start With OI

1. oilseed
2. oil nut
3. oil palm

Plants That Start With OK

1. oka
2. okra
3. okra plant

Plants That Start With OM

1. omphalotus
2. ombu
3. omphalotus illudens

Plants That Start With ON

1. onoclea sensibilis
2. onoclea
3. onopordum
4. onopordum acanthium
5. onopordon
6. onosmodium
7. ononis spinosa
8. oncidium
9. onagraceae
10. onion mildew
11. onopordon acanthium
12. onion smut
13. onychium
14. onobrychis
15. ononis repens
16. onion
17. oncidium papilio
18. onion stem
19. onobrychis viciaefolia
20. onoclea struthiopteris
21. ononis
22. onion plant
23. onobrychis viciifolia

Plants That Start With OP

1. ophrys apifera
2. ophioglossum pendulum
3. ophioglossales
4. opepe
5. opuntia
6. opossum wood
7. ophioglossaceae
8. ophrys sphegodes
9. ophrys insectifera
10. ophioglossum
11. opuntiales
12. opuntia lindheimeri
13. opuntia tuna
14. opuntia cholla
15. ophrys
16. ophrys muscifera
17. opium poppy

Plants That Start With OL

1. old world yew
2. old world hop hornbeam
3. olearia
4. old witch grass
5. oleaster
6. old maid flower
7. oleandraceae
8. oligoporus
9. olive tree
10. oleales
11. oleaceae
12. old man of the mountain
13. olearia haastii
14. olearia argophylla
15. oleaster family
16. oleandra neriiformis
17. olea europaea
18. olive
19. olfersia
20. olea
21. oligoporus leucospongia
22. old witchgrass
23. oleandra mollis
24. oleander fern
25. old growth
26. oleandra
27. oleander
28. old maid
29. olive family
30. old world mistletoe
31. olea cunninghamii
32. olea lanceolata
33. olfersia cervina

Plants That Start With OT

1. othonna

Plants That Start With OR

1. order coniferales
2. order psilotales
3. ornithogalum thyrsoides
4. order chytridiales
5. order proteales
6. ornithogalum
7. orchis
8. order myrtales
9. oreopteris
10. order auriculariales
11. order piperales
12. origanum vulgare
13. orach
14. order eurotiales
15. order scrophulariales
16. oryzopsis
17. order caryophyllales
18. order polypodiales
19. ormosia monosperma
20. orchil
21. order myricales
22. oregon white oak
23. orange balsam
24. order gentianales
25. order sphaeriales
26. orbignya cohune
27. order lepidodendrales
28. oregon alder
29. order alismales
30. order palmales
31. oriental garlic
32. order andreaeales
33. order pandanales
34. oriental plane
35. ordeal tree
36. order opuntiales
37. oriental bush cherry
38. order anthocerotales
39. order papaverales
40. oriental poppy
41. ordeal bean
42. order ophioglossales
43. oriental black mushroom
44. order bryales
45. order eubryales
46. order polemoniales
47. order sclerodermatales
48. ormosia
49. oryza sativa
50. orbignya spesiosa
51. order lycoperdales
52. oregon crab apple
53. orange hawkweed
54. order graminales
55. order thymelaeales
56. orange peel fungus
57. order hypericales
58. order umbellales
59. orbignya phalerata
60. order liliales
61. oregon cedar
62. order ebenales
63. order rubiales
64. orpine
65. orbiculate leaf
66. order jungermanniales
67. order xyridales
68. orchid
69. order malvales
70. oregon holly grape
71. order dicranales
72. order rosales
73. orpin
74. order agaricales
75. order orchidales
76. oriental cherry
77. orchid family
78. order aphyllophorales
79. order marchantiales
80. order parietales
81. oregon lily
82. oriental spruce
83. order campanulales
84. order polygonales
85. ormosia coarctata
86. order arales
87. order peronosporales
88. origanum
89. orchidaceae
90. order mucorales
91. oregon myrtle
92. orangewood
93. order juglandales
94. order ustilaginales
95. orange
96. order aristolochiales
97. order filicales
98. order pezizales
99. order selaginellales
100. origanum dictamnus
101. oryzopsis miliacea
102. orbignya
103. order lechanorales
104. oregano
105. orbignya martiana
106. order lichenales
107. oregon ash
108. orache
109. order fagales
110. order secotiales
111. oryzopsis hymenoides
112. orange daisy
113. order geraniales
114. order sphaerocarpales
115. order erysiphales
116. order sarraceniales
117. oryza
118. order cycadofilicales
119. order rhamnales
120. orontium
121. orange milkwort
122. order helotiales
123. order tuberales
124. orange fleabane
125. order ginkgoales
126. order sphagnales
127. orchis spectabilis
128. order oleales
129. oriental bittersweet
130. orchard grass
131. order lyginopteridales
132. oregon grape
133. order cordaitales
134. order ranales
135. ornithogalum umbellatum
136. orange milkweed
137. order guttiferales
138. order tremellales
139. orchard apple tree
140. order lycopodiales
141. oregon fir
142. order casuarinales
143. order ericales
144. order primulales
145. order saprolegniales
146. ornamental
147. orthotropous ovule
148. orchid tree
149. order moniliales
150. oregon maple
151. orchidaceous plant
152. order musales
153. oregon oak
154. order entomophthorales
155. order santalales
156. orrisroot
157. order bennettitales
158. order plantaginales
159. orites
160. order equisetales
161. order sapindales
162. orthilia
163. orchis mascula
164. order naiadales
165. oreopteris limbosperma
166. order endomycetales
167. order salicales
168. orris
169. order aspergillales
170. order phallales
171. origanum majorana
172. orchis papilionaceae
173. order nidulariales
174. oriental arborvitae
175. order blastocladiales
176. order plumbaginales
177. orites excelsa
178. orange mushroom pimple
179. order hymenogastrales
180. order tulostomatales
181. orchid cactus
182. order marattiales
183. oregon larch
184. orchidales
185. order mycelia sterilia
186. oregon pine
187. orange sneezeweed
188. order hypocreales
189. order uredinales
190. orange tree
191. order isoetales
192. order urticales
193. order commelinales
194. order psilophytales
195. ornithogalum pyrenaicum
196. order cycadales
197. order ranunculales
198. orobanchaceae
199. order diapensiales
200. order rhoeadales
201. orontium aquaticum
202. orange grass
203. order gnetales
204. order taxales

Plants That Start With OV

1. ovule
2. ovary
3. oval kumquat
4. ovate leaf
5. overcup oak

Plants That Start With OW

1. owlclaws

Plants That Start With OX

1. oxytropis
2. oxydendrum
3. oxandra
4. oxlip
5. oxalis acetosella
6. oxalis caprina
7. oxalidaceae
8. oxalis cernua
9. oxeye daisy
10. oxalis
11. oxalis corniculata
12. oxheart
13. oxalis crenata
14. oxalis tuberosa
15. oxytropis lambertii
16. oxtongue
17. oxandra lanceolata
18. oxalis violacea
19. oxeye
20. oxydendrum arboreum

Plants That Start With OY

1. oyster mushroom
2. oyster fungus
3. oyster plant
4. oyster agaric

Plants That Start With OO

1. oomycetes
2. oosphere

Plants That Start With OZ

1. ozonium
2. ozark sundrops
3. ozothamnus
4. ozark chinquapin
5. ozark chinkapin

Tropical Plants That Start With O

• Oleaceae
• Oxalidaceae
• Orobanchaceae
• Osmundaceae
• Ochnaceae
• Onagraceae
• Olacaceae
• Orchidaceae

House Plants | Indoor Plants That Start With O

• Ornamental Chili Pepper
• Orchid Cactus
• Oleander Plant

Perennials that Start with O

20 Plants Starting With Letter O (Pictures and Short Definitions)

1. Oak

Oak is a large deciduous or evergreen tree that is known for its sturdy wood and distinctive acorns. It is a common tree in many temperate regions around the world.

2. Oleander

Oleander is a flowering shrub that is native to the Mediterranean. It produces clusters of brightly colored, fragrant flowers and is often used in landscaping.

3. Oregano

Oregano is a fragrant herb that is often used in cooking, particularly in Mediterranean and Mexican cuisine. It has a pungent, slightly bitter taste.

4. Osmanthus

Osmanthus is a small tree or shrub that produces clusters of fragrant flowers in the spring. It is native to Asia and is often used in perfumes and teas.

5. Orchid

Orchid is a diverse family of flowering plants that includes thousands of species. They are known for their colorful, often fragrant blooms and are popular ornamental plants.

6. Onion

Onion is a bulbous vegetable that is a staple in many cuisines around the world. It has a pungent, sweet flavor and is often used in soups, stews, and salads.

7. Okra

Okra is a tall, flowering plant that produces edible seed pods. It is a common vegetable in many African, Middle Eastern, and Southern U.S. cuisines.

8. Olive

Olive is a small tree or shrub that is native to the Mediterranean region. It produces small, bitter fruit that is often used to make olive oil.

9. Orange

Orange is a citrus fruit that is high in vitamin C and is often eaten raw or used in juices, marmalades, and desserts.

10. Osage Orange

Osage Orange is a tree that is native to North America. It produces large, inedible fruit and is often used in landscaping as a windbreak or hedge.

11. Ornamental Grasses

Ornamental grasses are a diverse group of plants that are often used in landscaping for their unique texture and appearance. They come in a wide range of sizes, colors, and shapes.

12. Oregon Grape

Oregon Grape is a shrub that is native to North America. It produces clusters of yellow flowers and edible berries that are often used in jams and jellies.

13. Oxeye Daisy

Oxeye Daisy is a wildflower that is native to Europe and Asia. It produces clusters of white or yellow flowers and is often used in landscaping as a groundcover or border plant.

14. Olive Leaf

Olive Leaf is an herb that is often used in traditional medicine. It is believed to have anti-inflammatory and antioxidant properties and is often used to support immune function.

15. Ornamental Kale

Ornamental Kale is a decorative variety of edible vegetables that are often used in landscaping. It produces colorful, frilly leaves in shades of purple, green, and white.

16. Orange Jessamine

Orange Jessamine is a flowering shrub that is native to Asia. It produces clusters of fragrant, white or yellow flowers and is often used in landscaping as an ornamental plant.

17. Orchid Cactus

Orchid Cactus is a type of tropical cactus that produces large, showy flowers in shades of pink, red, and white. It is often grown as a houseplant.

18. Obedient Plant

The obedient Plant is a wildflower that is native to North America. It produces spikes of white, pink, or purple flowers that remain in bloom for several weeks. It is often used in landscaping as a border or accent plant.

19. Old Man’s Beard

Old Man’s Beard is a type of lichen that grows on trees and rocks. It has long, stringy strands that resemble a beard and are often used in herbal remedies.

20. Opuntia

Opuntia is a type of cactus that is native to the Americas. It produces large, flat pads that are covered in spines and are often used in Mexican cuisine.

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