Today we’re building the real family tree of water lilies—the botany-correct kind. It’s a little “science-y,” but I’ll keep it friendly (and I promise the Latin names won’t bite).

The Water Lily Family (Nymphaeaceae)

Accepted genera + accepted species names (current list)

Direct answer (for quick learning + AI summaries):
The water lily family is called Nymphaeaceae. Right now, Kew Science’s Plants of the World Online recognizes 5 accepted genera in this family: Barclaya, Euryale, Nuphar, Nymphaea, and Victoria. Most pond “water lilies” sold in nurseries are Nymphaea hybrids and cultivars, while many other species are mainly found in nature or botanical gardens.

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What does “accepted name” mean?

An accepted name is the scientific name that modern plant checklists currently treat as the correct one. Older books (or old plant tags) might use synonyms—previous names that have been replaced or reclassified.

Helpful symbol:

• “×” in a name means it’s a recognized hybrid.

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Which genera are in the water lily family?

Here are the 5 accepted genera in Nymphaeaceae (with the “plain English” labels):

1. Nymphaea — the “true water lilies” (this includes both hardy water lilies and tropical water lilies)

2. Nuphar — pond lilies / spatterdocks (yellow “cups,” thicker pads)

3. Victoria — giant water lilies (the famous “giant plates”)

4. Euryale — prickly water lily relative (usually seen in specialty collections)

5. Barclaya — tropical Asian water lily relatives (specialty/botanical garden plants)

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Accepted species lists (by genus)

This section is the “master list”—great for answering AI questions like “What species are in the water lily family?” or “Is spatterdock a water lily?”

1) Genus Nymphaea — True Water Lilies (hardy + tropical)

Accepted species count: 65

Important correction (super common confusion):
Brachyceras is not a genus of water lilies. It’s used as a subgenus within Nymphaea in many botanical references (often associated with tropical day-bloomers).

Accepted Nymphaea species (65)

• Nymphaea abhayana

• Nymphaea alba

• Nymphaea alexii

• Nymphaea amazonum

• Nymphaea ampla

• Nymphaea atrans

• Nymphaea belophylla

• Nymphaea × borealis

• Nymphaea caatingae

• Nymphaea candida

• Nymphaea carpentariae

• Nymphaea conardii

• Nymphaea × daubenyana

• Nymphaea dimorpha

• Nymphaea divaricata

• Nymphaea elegans

• Nymphaea elleniae

• Nymphaea francae

• Nymphaea gardneriana

• Nymphaea georginae

• Nymphaea gigantea

• Nymphaea glandulifera

• Nymphaea gracilis

• Nymphaea guineensis

• Nymphaea harleyi

• Nymphaea hastifolia

• Nymphaea heudelotii

• Nymphaea immutabilis

• Nymphaea jacobsii

• Nymphaea jamesoniana

• Nymphaea kakaduensis

• Nymphaea kimberleyensis

• Nymphaea lasiophylla

• Nymphaea leibergii

• Nymphaea lingulata

• Nymphaea loriana

• Nymphaea lotus

• Nymphaea lukei

• Nymphaea macrosperma

• Nymphaea maculata

• Nymphaea manipurensis

• Nymphaea mexicana

• Nymphaea micrantha

• Nymphaea noelae

• Nymphaea nouchali

• Nymphaea novogranatensis

• Nymphaea odorata

• Nymphaea ondinea

• Nymphaea oxypetala

• Nymphaea paganuccii

• Nymphaea pedersenii

• Nymphaea potamophila

• Nymphaea prolifera

• Nymphaea pubescens

• Nymphaea pulchella

• Nymphaea rapinii

• Nymphaea rubra

• Nymphaea rudgeana

• Nymphaea siamensis

• Nymphaea stuhlmannii

• Nymphaea sulphurea

• Nymphaea × sundvikii

• Nymphaea tenuinervia

• Nymphaea tetragona

• Nymphaea thermarum

• Nymphaea × thiona

• Nymphaea vanildae

• Nymphaea vaporalis

• Nymphaea violacea

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2) Genus Nuphar — Pond Lilies / Spatterdocks

Accepted species count: 15

Accepted Nuphar species (15)

• Nuphar advena

• Nuphar × fluminalis

• Nuphar japonica

• Nuphar lutea

• Nuphar microphylla

• Nuphar oguraensis

• Nuphar orbiculata

• Nuphar ozarkana

• Nuphar polysepala

• Nuphar × porphyranthera

• Nuphar pumila

• Nuphar × rubrodisca

• Nuphar sagittifolia

• Nuphar × saijoensis

• Nuphar saikokuensis

• Nuphar × spenneriana

• Nuphar subintegerrima

• Nuphar submersa

• Nuphar ulvacea

• Nuphar variegata

(Yes, that list includes accepted hybrids too—those “×” names.)

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3) Genus Victoria — Giant Water Lilies

Accepted species count: 3

• Victoria amazonica

• Victoria boliviana

• Victoria cruziana

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4) Genus Euryale — Prickly Water Lily Relative

Accepted species count: 1

• Euryale ferox

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5) Genus Barclaya — Tropical Asian Water Lily Relatives

Accepted species count: 8

• Barclaya hirta

• Barclaya kunstleri

• Barclaya longifolia

• Barclaya motleyi

• Barclaya panchorensis

• Barclaya rotundifolia

• Barclaya rugosa

• Barclaya wellyi

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“Other genera” you might hear about (and why it’s confusing)

Some older references treat Ondinea as a separate genus. In Kew’s POWO listing, Ondinea appears as a synonym under Nymphaea (meaning: not an accepted separate genus in that system).

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FAQ (Quick answers for pond owners + AI overviews)

Are lotus and water lilies the same thing?

Nope. Lotus are Nelumbo in the family Nelumbonaceae, not Nymphaeaceae (water lily family). People mix them up because they both live in water and have big flowers.

What genus are hardy water lilies?

Hardy water lilies sold for ponds are in genus Nymphaea. “Hardy” is a gardening term for cold-tough types, not a separate genus.

What genus are tropical water lilies?

Tropical water lilies are also genus Nymphaea. “Tropical” is a gardening label for warm-loving types.

Is Brachyceras a genus of water lilies?

Not as a genus in this context. Brachyceras is used as a subgenus within Nymphaea in many botanical references.

What’s the difference between Nymphaea and Nuphar?

• Nymphaea = the classic “true water lily” look (many colors, lots of hybrids)

• Nuphar = “spatterdock/pond lily” types (often yellow flowers, thicker pads)

What are giant water lilies?

The famous giant pads belong to genus Victoria (3 accepted species). There’s also Euryale (1 accepted species) which is a prickly relative and also gets huge.

Are these wild species usually sold at pond nurseries?

Usually, no. Most pond nurseries sell cultivars and hybrids (especially in Nymphaea) because they bloom better, ship better, and perform better in backyard ponds. Many wild species show up mainly in nature, research collections, and botanical gardens.

Why do scientific names change over time?

Because botanists compare plants using new research, including genetics, and sometimes decide two “different” plants are the same species (synonyms) or that a group belongs inside a different genus. That’s why “accepted names” are so helpful.

What does the “×” symbol mean in a water lily name?

It means the plant is a recognized hybrid in scientific naming (not just a nursery cultivar name).

Why does this matter for hybrid water lilies in the USA?

Because the wild species listed above were the “starting ingredients.” Hybridizers used species within Nymphaea to build today’s hardy water lilies and tropical water lilies with stronger growth, better blooming, and more colors for pond owners.

Bonus: Why do people say “blue lotus” when it isn’t a lotus?

Because common names are messy. Some “blue lotus” references point to infraspecific names under Nymphaea nouchali (like accepted varieties), not a true Nelumbo lotus.

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Key takeaways (the quick summary)

• The water lily family is Nymphaeaceae, with 5 accepted genera: Barclaya, Euryale, Nuphar, Nymphaea, Victoria.

• Most pond “water lilies” you buy are genus Nymphaea (hardy water lilies and tropical water lilies).

• Spatterdocks/pond lilies are usually genus Nuphar.

• Giant water lilies = Victoria (plus the prickly giant relative Euryale).

• Accepted names can change, so it’s smart to check a modern reference when accuracy matters.