Herbs: O
- OchnaOchna金莲木属
- Ochna integerrimaGolden lotus wood金莲木
- OchnaceaeGolden Lotus Family金莲木科
- Ochrosia borbonicaRose Tree玫瑰树
- Ochrosia ellipticaScarlet Wedge-apple古城玫瑰树
- OcimumBasil Genus罗勒属
- Ocimum basilicumBasil Seed罗勒子
- Ocimum basilicumSmall-headed Throat Cooler小头凉喉茶
- Ocimum gratissimumAfrican basil丁香罗勒
- Ocimum gratissimumCamphor Basil樟脑罗勒
- Ocimum sanctumHoly Basil塞勒罗勒
- Octopus vulgarisOctopus章鱼
- OdontoglossumDentate grass齿叶草
- Oenanthe crocataSaffron-colored Water Dropwort藏红花色水芹
- Oenanthe javanicaWater celery水芹
- Oenothera shortvillosaShort-velvet oenothera短绒毛欧夏至草
- OlacaceaeIron Green Tree Family铁青树科
- Olea africanaAfrican Olive非洲橄榄
- Olea europaeaOlive Ash Umbrella橄榄白蜡伞
- Olea europaeaOlive油橄榄
- Olea europaeaOlive Tree橄榄树
- OleaceaeOlive Family木犀科
- OleaceaeOlive橄榄 (橄榄科)
- Oleandra wallichiiAlpine Brake Fern高山条蕨
- Omphalia lapidescensThunder Pill雷丸
- OnagraceaeWillow herb family柳叶菜科
- OnobrychisDonkey food驴食草属
- Onobrychis viciifoliaSainfoin红豆草
- Onopordum acanthiumCotton Thistle大翅蓟
- Onosma hookeriOnosma Hookeri细花滇紫草
- Onosma paniculataYunnan Alkanet滇紫草
- OnychiumOnychium金粉蕨属
- Onychium japonicum var. lucidumChestnut-handled Golden Powder Fern栗柄金粉蕨
- Onychium siliculosumOnychium Siliculosum金粉蕨
- OphiocordycepsCordyceps Genus冬虫夏草属
- Ophiocordyceps sinensisCordyceps冬虫夏草
- Ophioglossum vulgatumAdder's-tongue瓶尔小草
- Ophioglossum vulgatumBlood-stanching fern断血流
- Ophiophagus indicaIndian snake mushroom印度蛇菇
- Ophiopogon hubeiensisHubei Mountain Liriope湖北山麦冬
- Ophiopogon japonicusBroad-leaved Mondo Grass阔叶山麦冬
- Ophiopogon japonicusLiriope麦门冬
- Ophiopogon japonicusLiriope麦冬
- Ophiorrhiza japonicaOphiorrhiza Japonica日本蛇根草
- Ophiorrhiza mungosSnake Root Grass蛇根草
- Ophiorrhiza pumilaShort Snake Root Grass短小蛇根草
- Opuntia cochenilliferaGreen cactus绿仙人掌
- Opuntia ficus-indicaIndian Fig梨果仙人掌
- Opuntia ficus-indicaPrickly Pear仙人掌
- OrchidaceaeOrchid Family兰科
- OrchisRhododendron Orchid Genus红门兰属
- Origanum majoranaMarjoram墨角兰
- Origanum syriacumSyrian Oregano叙利亚牛至
- Origanum vulgareOregano牛至
- Ormosia henryiFlowered Palm Wood花榈木
- Ornithogalum caudatumMountain Arrowhead山慈姑
- Orobanche coerulescensOrobanche列当
- Orobanche europaeaEuropean Broomrape欧列当
- Orostachys fimbriataTile Pine瓦松
- Oroxylum indicumWood Butterfly Bark木蝴蝶树皮
- Orthosiphon aristatusCat Whisker Grass猫须草
- Oryza glutinosaSticky rice糯稻
- Oryza sativaGreen-stemmed Bamboo青秆竹
- Oryza sativaJinggu slave粳谷奴
- Oryza sativaRice Straw稻草
- Oryza sativaSingle-stem Rice Flower单枝稻花
- Osmanthus fragransGreen-backed osmanthus绿背桂花
- Osmanthus fragransOsmanthus桂花
- Osmanthus fragransRed-backed Osmanthus红背桂
- Osmorhiza aristataOsmorhiza Aristata香根芹
- Osmunda japonicaPurple fern紫萁
- Ostodes paniculataLeaf wheel wood叶轮木
- Ostrea gigasOyster Meat牡蛎肉
- Otostegia integrifoliaEntire-leaved Otostegia全缘叶奥托斯特草
- Otostegia limbataEaved otostegia有檐奥托斯特草
- OvibosSheep grass羊族草属
- Ovis ariesSheep Pancreas羊胰
- Oxalis corniculataCreeping Woodsorrel酸水草
- Oxalis corniculataSorrel酢浆草
- Oxalis montanaMountain Sorrel山酢浆草
- Oxytropis campestrisField oxytropis田野棘豆
- Oxytropis myriophyllaMulti-leaved Oxytrope多叶棘豆