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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.

295 species · PenstemonShowing 25–48

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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 yetPenstemon azureusName author: Benth.Accepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon baccharifoliusName author: Hook.Accepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon barbatusName author: (Cav.) RothAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon barnebyiName author: N.H.HolmgrenAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon barrettiaeName author: A.GrayAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon bicolorName author: (Brandegee) Clokey & D.D.KeckAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon bleaklyiName author: O'Kane & K.D.HeilAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon bolaniusName author: StrawAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon bolanusName author: StrawAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon bracteatusName author: D.D.KeckAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon bradburyiName author: PurshAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon brevibarbatusName author: CrosswhiteAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon breviculusName author: (D.D.Keck) G.T.Nisbet & R.C.Jacks.Accepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon brevisepalusName author: PennellAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon buckleyiName author: PennellAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon caesiusName author: A.GrayAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon caespitosusName author: Nutt. ex A.GrayAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon calcareusName author: BrandegeeAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon californicusName author: (Munz & I.M.Johnst.) D.D.KeckAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon calycosusName author: SmallAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon campanulatusName author: (Cav.) Willd.Accepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon canescensName author: BrittonAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon cardinalisName author: Wooton & Standl.Accepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
No photo yetPenstemon cardwelliiName author: HowellAccepted speciesPlantaginaceaePenstemon genus
Related genus guidesPenstemon Smooth Beardtongue
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 1230 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.