- Echinodorus Bambi
- Echinodorus Bark Beetle Road
- Echinodorus barthii Azurea
- Echinodorus x barthii doppelt Rot
- Echinodorus barthii double red
- Echinodorus barthii H.Mühlberg
- Echinodorus Batik
- Echinodorus Beauty Red
- Echinodorus Berlin
- Echinodorus berteroi (Spreng.) Fassett
- Echinodorus berteroi subsp. patagonicus (Speg.) Rataj
- Echinodorus berteroi var. berteroi
- Echinodorus berteroi var. lanceolatus (Engelm. ex S.Watson & Coult.) Fernald
- Echinodorus berteroi var. patagonicus (Speg.) Rataj
- Echinodorus Big Leopard
- Echinodorus Big Red Chinese
- Echinodorus Bima
- Echinodorus Black Reggae
- Echinodorus bleherae Rataj
- Echinodorus Bleheri
- Echinodorus bleheri var. Robustus
- Echinodorus Bloody tourists
- Echinodorus Bohemus
- Helanthium bolivianum (Rusby) Lehtonen & Myllys
- Helanthium bolivianum Angustifolius
- Helanthium bolivianum Vesuvius
- Echinodorus bolivianus (Rusby) Holm-Niels.
- Echinodorus Bordeaux
- Echinodorus botanicorum L.D.Gómez & Gómez-Laur.
- Aquarius bracteatus (Micheli) Christenh. & Byng
- Echinodorus bracteatus Micheli
- Echinodorus bracteatus subsp. bracteatus
- Echinodorus bracteatus subsp. efenestratus (Fassett)
- Echinodorus bracteatus var. bracteatus
- Echinodorus bracteatus var. efenestratus Fassett R.R.Haynes & Holm-Niels.
- Echinodorus Brauner Elefant
- Echinodorus Breuni Red
- Echinodorus brevipedicellatus (Kuntze) Buchenau
- Echinodorus Bright Flame
- Echinodorus Bromo
- Echinodorus Brown Baby
- Echinodorus Brown Kid
- Echinodorus Brown Pattern
- Echinodorus Burelom
