Seeds from Maurandya barclayana or Mexican Viper. A skinny climber from a woody base the leaves are small and triangular with bluish purple flowers, a native of Mexico. Growing on limestone rocks and in dry scrub. flowering June to October. Stems to 2m or more. Leaves 2 to 4cm long. Flowers 3 to 7cm long, white in the throat. For a dry sunny position. Zones 9 to 12.