act two under the canopy periwinkle family : apocynaceae genus : vinca species : minor , major common names : periwinkle , cezayirmeneksesi , common periwinkle , vincapervinc parts used : whole plant properties/actions : analgesic , antibacterial , antimicrobial , antiinflammatory , astringent , cardiotonic , carminative , depurative , diuretic , emmenagogue , febrifuge , hemostat , hypotensive , lactogogue , hepatoprotective , sedative , sialogogue , spasmolytic , stomachic , tonic , vulnerary four wauwai august 7 , 8:12 a.m. en route over the amazon jungle nathan stared out the helicopter 's windows .