1000+ Plants That Start With O (Complete List)

Plants That Start With O

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

Common Name Botanical Name
Obedient plant Physostegia virginiana
Oxeye Buphthalmum
Oxalis Oxalis crassipes
Osmunda Osmunda
Oregano Origanum
Oat Grass Arrhenatherum
Ornamental Onion Allium
Ostrich fern Matteuccia

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

1. Oak

Oak plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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 plant

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

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

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 Mans Beard Plant

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 Plant

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.

Other Plants Starting With:

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