Compilation
Indigofera triquetra

herbaceous, subsimple, nearly glabrous; stem sharply triquetrous, somewhat fistular, glabrous; leaves distant, on long, triangular petioles, trifoliolate; leaflets narrow-linear, acute, glabrous above, minutely strigillose beneath; stipules subulate, erect; racemes spicate on very long, angular peduncles, many-flowered; bracts subulate, longer than the calyx, deciduous; calyx silky, its lobes lanceolate, longer than the tube; petals puberulous; legumes (young) pendulous, strigilloso-pubescent. Two feet or more high, slightly branched, weak and scarcely at all lignescent. The general aspect is that of I. psoraleoides, from which this is at once known by its very sharply 3-angled and subinflated stem and petioles, its nearly glabrous surface and different calyx.