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A WIDER WORLD OF FLOWERS

The botanical directory

From familiar garden flowers to species you have yet to meet. Explore the flowering plant tree through accepted scientific names, botanical families, and synonyms.

Accepted species
347,476
Synonym names
710,971
Botanical families
430
Genera
13,895

Find a flower. Follow its family.

Search scientific names or try a familiar florist name, like rose or peony.

Scientific names and synonyms are searchable from two characters. Familiar florist names link to their broader genus; common names are not available for every species.

495 species · CirsiumShowing 193–216

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Photos show the identified species; cultivars and commercial forms can vary. Related genus guides cover other plants in the same group. Name authors credit the botanists behind a scientific name; “L.” stands for Carl Linnaeus. Swipe across the table to see family and guide links.

Flowering species, botanical families, photographs, and available florist guides
PhotoSpeciesFamily & genusFlower guides
No photo yetCirsium hasunumaeName author: KadotaAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium haussknechtiiName author: Boiss.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hawaiensisName author: H.Lév.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium heiianumName author: Koidz.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium heldreichiiName author: HalácsyAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium helenioidesName author: (L.) HillAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium henryiName author: (Franch.) DielsAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium heterophyllumName author: (L.) HillAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium heterotrichumName author: PančićAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hida-paludosumName author: Kadota & NagaseAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hidakamontanumName author: KadotaAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hidalgoenseName author: G.L.NesomAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium homolepisName author: NakaiAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hookerianumName author: Nutt.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium horridulumName author: Michx.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium horridumName author: FormánekAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hosokawaiName author: Kitam.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hupehenseName author: Pamp.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hybridumName author: W.D.J.KochAccepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hydrophilumName author: Jeps.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hygrophilumName author: Boiss.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hypoleucumName author: DC.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium hypopsilumName author: Boiss. & Heldr.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
No photo yetCirsium iburienseName author: Kitam.Accepted speciesAsteraceaeCirsium genus
Related genus guidesTall Thistle Swamp Thistle
THE SOURCE & THE SCOPE

A living reference.
A documented starting point.

Taxonomy changes as plants are studied. This directory preserves the accepted names and synonym relationships in a specific World Flora Online release, so you can trace every entry to its source.

View the June 2026 source dataset

What is included?

All 347,476 accepted species classified under Angiosperms in this snapshot, plus 710,971 names treated as synonyms of those species. Flowering trees, grasses, and other less familiar flowering plants belong here too.

Is this every flower that has ever existed?

No complete list of every historical or undiscovered species exists. This collection excludes unresolved names, subspecies and varieties as separate records, non-flowering plants, and most cultivated forms. It is not a complete fossil or cultivar register.

Can I order these flowers?

A botanical record does not establish cut-flower availability or suitability for an arrangement. Our 980 florist guides cover commercial flowers, specialty garden cuts, and foliage, with design notes, photos, and calculator links. Calculator selection uses that florist collection; other ingredients can be entered as custom items.

Taxonomy: World Flora Online Consortium · CC0 public domain · Published June 21, 2026. Photographs and editorial florist guides have separate credits.