In this paper we relate the isolation of crystals of sodium and potassium thio-cyanates, nitrates and nitrites from the tubers and stem of Humiranthera ampla. We have also determined the amounts of nitrate and nitrite in young and matures leaves of H. ampla and H. rupesiris. The maximum amounts of N-NO-3 observed in H. ampla and H. rupesiris were 8,828 mg% and 6,422 mg%, respectively.