Explore 23,508 Species
Sea Rose
Orphium frutescens (L.) E.Mey.
Orphium frutescens is a pink-flowered South African subshrub that needs native c…
one-sided wintergreen
Orthilia secunda (L.) House
Orthilia secunda is the only species in the Ericaceae genus Orthilia, with multi…
Toothed Owl's Clover
Orthocarpus cuspidatus Greene
Orthocarpus cuspidatus is an annual flowering herb in the broomrape family nativ…
yellow owl's-clover
Orthocarpus luteus Nutt.
Orthocarpus luteus Nutt. is an annual herb with colored stems, narrow leaves, an…
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 t…
Birds mouth orchid
Orthoceras strictum R.Br.
Orthoceras strictum, the bird's-mouth orchid, is an uncommon terrestrial orchid …
Fragile Fork-moss
Orthodicranum tauricum (Sapjegin) Smirnova
Dicranum tauricum, or Orthodicranum tauricum, is a fork moss native to western N…
Leafless Swallow-wort
Orthosia scoparia (Nutt.) Liede & Meve
Orthosia scoparia, or leafless swallow-wort, is a climbing perennial milkweed vi…
Cat's Whiskers
Orthosiphon aristatus (Blume) Miq.
Orthosiphon aristatus, commonly cat's whiskers/Java tea, is a Lamiaceae medicina…
Chinese Violet Cress
Orychophragmus violaceus (L.) O.E.Schulz
Orychophragmus violaceus, Chinese violet cress, is a Brassicaceae flowering plan…
Deltoid-leaved Dewplant
Oscularia deltoides (L.) Schwantes
Oscularia deltoides is a South African succulent ornamental grown for its pink s…
False Rosinweed
Osmadenia tenella Nutt.
Osmadenia tenella Nutt. is an uncommon aromatic annual herb native to chaparral …
holly olive
Osmanthus heterophyllus (G.Don) P.S.Green
Osmanthus heterophyllus is an evergreen flowering shrub or small tree widely gro…
mountain sweet cicely
Osmorhiza berteroi DC.
Osmorhiza berteroi DC. is an aromatic perennial herb native to temperate North a…
hairy sweet cicely
Osmorhiza claytonii (Michx.) C.B.Clarke
Osmorhiza claytonii is an anise-scented herbaceous perennial native to rich Nort…
aniseroot
Osmorhiza longistylis (Torr.) DC.
Osmorhiza longistylis is a North American anise-scented herbaceous perennial in …
Western Sweet-cicely
Osmorhiza occidentalis (Nutt. ex Torr. & A.Gray) Torr.
Osmorhiza occidentalis is an erect perennial North American herb historically us…
Japanese royal fern
Osmunda japonica Thunb.
Osmunda japonica Thunb. is an East Asian fern whose young fronds are eaten as a …
American Royal Fern
Osmunda regalis L.
Osmunda regalis L., the royal fern, is a large perennial fern that is cultivated…
American Royal Fern
Osmunda spectabilis Willd.
Osmunda spectabilis is a New World fern distinct from similar species, that typi…
cinnamon fern
Osmundastrum cinnamomeum (L.) C.Presl
Osmundastrum cinnamomeum, the cinnamon fern, is a widespread deciduous fern with…
ʻŪlei
Osteomeles anthyllidifolia (Sm.) Lindl.
Osteomeles anthyllidifolia is a shrub used for traditional Hawaiian medicine, wo…
Weedy Buchu Boneseed
Osteospermum calendulaceum L.fil.
Osteospermum calendulaceum is an Asteraceae species native to southern Africa th…
Bietou
Osteospermum moniliferum L.
Osteospermum moniliferum, or boneseed, is an Asteraceae shrub native to southern…
