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.

29 species · RudbeckiaShowing 124

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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. Swipe across the table to see family and guide links.

Flowering species, botanical families, photographs, and available florist guides
PhotoSpeciesFamily & genusFlower guides
No photo yetRudbeckia alismifoliaTorr. & A.GrayAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia alpicolaPiperAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia amplexicaulisVahlAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia auriculata(Perdue) KralAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia californicaA.GrayAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia flavaT.V.MooreAccepted speciesAsteraceaeRudbeckia genus
flower and leaves (summer in Moore county)

Photo Credit: Susan Strine · CC BY 2.0

Rudbeckia fulgidaAitonAccepted speciesAsteraceaeRudbeckia genusOrange Coneflower guide
No photo yetRudbeckia glaucescensEastw.Accepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia graminifolia(Torr. & A.Gray) C.L.Boynton & BeadleAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia grandiflora(Sweet) C.C.Gmel. ex DC.Accepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia heliopsidisTorr. & A.GrayAccepted speciesAsteraceaeRudbeckia genus
Black-eyed Susan — botanical reference

Photo Credit: Krzysztof Ziarnek, Kenraiz · CC BY-SA 4.0

Rudbeckia hirtaL.Accepted speciesAsteraceaeRudbeckia genusBlack-eyed Susan guide
No photo yetRudbeckia klamathensisP.B.Cox & UrbatschAccepted speciesAsteraceaeRudbeckia genus
Bloom

Photo Credit: Kathy Sill · CC BY 4.0

Rudbeckia laciniataL.Accepted speciesAsteraceaeRudbeckia genusCutleaf Coneflower guide
Rudbeckia maxima

Photo Credit: peganum · CC BY-SA 4.0

Rudbeckia maximaNutt.Accepted speciesAsteraceaeRudbeckia genusGiant Coneflower guide
No photo yetRudbeckia missouriensisEngelm. ex C.L.Boynton & BeadleAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia mohriiA.GrayAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia mollisElliottAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia montanaA.GrayAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia nitidaNutt.Accepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia occidentalisNutt.Accepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia scabrifoliaL.E.Br.Accepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia serotina(Nutt.) SweetAccepted speciesAsteraceaeRudbeckia genus
No photo yetRudbeckia spathulataMichx.Accepted speciesAsteraceaeRudbeckia genus
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 480 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.