1. Of or relating to or forming an isthmus

See also: isthmus

Encyclopedia: Isthmian

• genus Rhynia
• genus Ribes
• genus Richea
• genus Richmondena
• genus Ricinus
• genus Rickettsia
• genus Riparia
• genus Rissa
• genus Rivina
• genus Rivulus
• genus Robinia
• genus Roccella
• genus Roccus
• genus Rodolia
• genus Romneya
• genus Roridula
• genus Rorippa
• genus Rosa
• genus Rosellinia
• genus Rosmarinus
• genus Roystonea
• genus Rubia
• genus Rubus
• genus Rudbeckia
• genus Rumex