RORIPPA, cress 
[S, G, M: incl. NASTURTIUM] 
(Al-Shehbaz, 1988b) 
prehgiie islandica (var. islandica), see excluded taxa 
ra 
R. 
R. 
et (L.) Hayek, water cress [S, G, M: 
inale R. Br. incl. var. siifolium 
canines Koch] nghiekés 1962; Al-Shehbaz, 1988b), 
757 
. palustris (L.) Besser, marsh yellow cress, ri yellow cress, 
yellow water cress [S: R. islandica (Oeder ex Murray) 
Borbas] (Stuckey, 1972), p. 760 
ssp. glabra (O. Schulz) Stuckey 
var. fernaldiana (Butters & Abbe) Stuckey [S, M: R. 
islandica var. femaldiana Butters & Abbe] (Stuckey, 
1972 
ssp. hispida (see excluded taxa) 
sessiliflora (Nutt. ex Torrey & A. Gray) A. Hitchc., 
sessile-flowered cress, marsh cress, yellow cress, p. 760 
sinuata (Nutt. ex Torrey & A. Gray) A. Hitchc., spreading 
yellow cress, p. 758 
#R. sylvestris (L.) Besser, creeping yellow cress, p. 758 
R. tenerrima E. Greene (Stuckey, 1972 
R. 
teres (Michaux) Stuckey, see excluded taxa 
*R. truncata (Jepson) Stuckey (Stuckey, 1972) 
SELENIA 
Selenia aurea Nutt., p. 743 
SIBARA 
Sibara virginica (L.) Rollins, p. 752 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
