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Genus :


Family :



Annual or perennial herbs, terrestrial or epiphytic. Leaves simple, spirally arranged, alternate or opposite, exstipulate. Flowers bisexual, resupinate, regular, axillary racemes or fascicles, or solitary, 1 to many together, pedunculate. Sepals 3, rarely 5, coloured, imbricate, lateral sepals 2, much smaller than petals, lower sepal with a short or long spur. Petals 5, lateral 4 united to pairs. Stamens 5, anthers cohering. Ovary 5-locular, ovules many, stigma sessile, 5-toothed. Fruits 5-valved capsules, loculicidally dehiscent. Seeds smooth or tubercled, glabrous or hairy.

Key to the species

Serial Key Reference
1a. Leaves alternate; seeds globose. Fruits densely tomentose I. balsamina
1b. Leaves opposite or whorled, seeds pyriform 2
2a. Stem not swollen at nodes; leaves margins sharply serrated; seeds globose I. glandulifera
2b. Stem swollen at nodes; leaves margins shallowly serrate; seeds pyriform I. tripetala