Plants — 23,508 Species
Top Families in Plants
All Plants Species
Sea Rose
Orphium frutescens (L.) E.Mey.
Orphium frutescens is a pink-flowered South African subshrub that needs native carpenter bee vibrations to release pollen.
one-sided wintergreen
Orthilia secunda (L.) House
Orthilia secunda is the only species in the Ericaceae genus Orthilia, with multiple common names and a circumboreal Northern Hemisphere distribution.
Toothed Owl's Clover
Orthocarpus cuspidatus Greene
Orthocarpus cuspidatus is an annual flowering herb in the broomrape family native to western US mountain and plateau habitats.
yellow owl's-clover
Orthocarpus luteus Nutt.
Orthocarpus luteus Nutt. is an annual herb with colored stems, narrow leaves, and bright yellow club-shaped flowers in dense spikes.
New Zealand Horned Orchid
Orthoceras novae-zeelandiae (A.Rich.) M.A.Clem., D.L.Jones & Molloy
Orthoceras novae-zeelandiae is a tuberous perennial terrestrial orchid endemic to New Zealand's North and South Islands, flowering from December to March.
Birds mouth orchid
Orthoceras strictum R.Br.
Orthoceras strictum, the bird's-mouth orchid, is an uncommon terrestrial orchid found in eastern Australia, Tasmania and New Caledonia.
Fragile Fork-moss
Orthodicranum tauricum (Sapjegin) Smirnova
Dicranum tauricum, or Orthodicranum tauricum, is a fork moss native to western North America that has been introduced to Europe.
Leafless Swallow-wort
Orthosia scoparia (Nutt.) Liede & Meve
Orthosia scoparia, or leafless swallow-wort, is a climbing perennial milkweed vine native to the Southeast US and Caribbean.
Cat's Whiskers
Orthosiphon aristatus (Blume) Miq.
Orthosiphon aristatus, commonly cat's whiskers/Java tea, is a Lamiaceae medicinal herb from tropical Asia and Australian Queensland, used in medicine and landscaping.
Chinese Violet Cress
Orychophragmus violaceus (L.) O.E.Schulz
Orychophragmus violaceus, Chinese violet cress, is a Brassicaceae flowering plant native to East Asia, cultivated as a vegetable in China.
Deltoid-leaved Dewplant
Oscularia deltoides (L.) Schwantes
Oscularia deltoides is a South African succulent ornamental grown for its pink spring flowers, with an RHS Award of Garden Merit.
False Rosinweed
Osmadenia tenella Nutt.
Osmadenia tenella Nutt. is an uncommon aromatic annual herb native to chaparral and woodland habitats of California and Baja California.
holly olive
Osmanthus heterophyllus (G.Don) P.S.Green
Osmanthus heterophyllus is an evergreen flowering shrub or small tree widely grown in cultivation as a hedge.
mountain sweet cicely
Osmorhiza berteroi DC.
Osmorhiza berteroi DC. is an aromatic perennial herb native to temperate North and South America, used by Native peoples for food and medicine.
hairy sweet cicely
Osmorhiza claytonii (Michx.) C.B.Clarke
Osmorhiza claytonii is an anise-scented herbaceous perennial native to rich North American wooded habitats.
aniseroot
Osmorhiza longistylis (Torr.) DC.
Osmorhiza longistylis is a North American anise-scented herbaceous perennial in the carrot family, with historical culinary and medicinal uses.
Western Sweet-cicely
Osmorhiza occidentalis (Nutt. ex Torr. & A.Gray) Torr.
Osmorhiza occidentalis is an erect perennial North American herb historically used for many medicinal purposes by Native American groups.
Japanese royal fern
Osmunda japonica Thunb.
Osmunda japonica Thunb. is an East Asian fern whose young fronds are eaten as a vegetable and that can reduce indoor formaldehyde.
American Royal Fern
Osmunda regalis L.
Osmunda regalis L., the royal fern, is a large perennial fern that is cultivated, used for growing medium, and featured in Slavic mythology.
American Royal Fern
Osmunda spectabilis Willd.
Osmunda spectabilis is a New World fern distinct from similar species, that typically grows in wet habitats.
cinnamon fern
Osmundastrum cinnamomeum (L.) C.Presl
Osmundastrum cinnamomeum, the cinnamon fern, is a widespread deciduous fern with edible and medicinal uses, native across Americas and Asia.
ʻŪlei
Osteomeles anthyllidifolia (Sm.) Lindl.
Osteomeles anthyllidifolia is a shrub used for traditional Hawaiian medicine, wood crafts, and dye from its edible fruit.
Weedy Buchu Boneseed
Osteospermum calendulaceum L.fil.
Osteospermum calendulaceum is an Asteraceae species native to southern Africa that is an agricultural weed in parts of Australia.
Bietou
Osteospermum moniliferum L.
Osteospermum moniliferum, or boneseed, is an Asteraceae shrub native to southern Africa with distinct subspecies ranges.
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