| 1 | 
|   | Species 
amphibium
(L.) Ait. f. syn. Rorippa amphibia
 |  |  | 
| 2 | 
|   | Species 
armoracia
(L.) Fries syn. Armoracia rusticana
 |  |  | 
| 3 | 
|   | Species 
austriacum
Crantz syn. Rorippa austriaca
 |  |  | 
| 4 | 
|   | Species 
calycinum
Engelm. syn. Rorippa calycina
 |  |  | 
| 5 | 
|   | Species 
curvisiliqua
(Hook.) Nutt. ex Torr. & Gray |  |  | 
|  | 
| 6 | 
|   | Varietas 
nuttallii
S. Wats. syn. Rorippa curvisiliqua var. nuttallii
 |  |  |  | 
| 7 | 
|   | Species 
gambelii
(S. Wats.) O.E. Schulz syn. Rorippa gambelii
 |  |  | 
| 8 | 
|   | Species 
heterophyllum
Blume syn. Rorippa indica var. indica
 |  |  | 
| 9 | 
|   | Species 
lacustre
Gray syn. Neobeckia aquatica
 |  |  | 
| 10 | 
|   | Species 
lyratum
Nutt. syn. Rorippa curvisiliqua var. lyrata
 |  |  | 
| 11 | 
|   | Species 
microphyllum
Boenn. ex Reichenb. syn. Rorippa microphylla
 |  |  | 
| 12 | 
|   | Species 
microspermum
DC. syn. Rorippa cantoniensis
 |  |  | 
| 13 | 
|   | Species 
nasturtium-aquaticum
(L.) Karsten syn. Rorippa nasturtium-aquaticum
 |  |  | 
| 14 | 
|   | Species 
obtusum
Nutt. |  |  | 
|  | 
| 15 | 
|   | Varietas 
alpinum
S. Wats. syn. Rorippa alpina
 |  |  |  | 
| 16 | 
|   | Species 
occidentale
Greene syn. Rorippa curvisiliqua var. occidentalis
 |  |  | 
| 17 | 
|   | Species 
officinale
Ait. f. common name: 
watercress
 |   |  | 
|  | 
| 18 | 
|   | Varietas 
microphyllum
(Boenn. ex Reichenb.) Thellung syn. Rorippa microphylla
 |  |  |  
| 19 | 
|   | Varietas 
siifolium
(Reichenb.) W.D.J. Koch syn. Rorippa nasturtium-aquaticum
 |  |  |  | 
| 20 | 
|   | Species 
sarmentosum
(G. Forst. ex DC.) Schinz & Guillaumin syn. Rorippa sarmentosa
 |  |  | 
| 21 | 
|   | Species 
sessiliflorum
Nutt. syn. Rorippa sessiliflora
 |  |  | 
| 22 | 
|   | Species 
sinuatum
Nutt. |  |  | 
|  | 
| 23 | 
|   | Varietas 
columbiae
Suksdorf ex B.L. Robins. syn. Rorippa columbiae
 |  |  |  | 
| 24 | 
|   | Species 
sphaerocarpum
Gray syn. Rorippa sphaerocarpa
 |  |  | 
| 25 | 
|   | Species 
stylosum
Shuttlw. ex O.E. Schulz syn. Rorippa floridana
 |  |  | 
| 26 | 
|   | Species 
x sterile
(Airy-Shaw) Oefel. syn. Rorippa �sterilis
 |  |  |