Flora of the Hawaiian Islands
Dicotyledon Literature for Indigofera suffruticosa
Wagner et al., 1990, 1999; Lorence & Wagner, 2020.
   Fabaceae -- The Pea Family Bibliography
      Indigofera suffruticosa

Common name(s): indigo, `iniko, `inikoa, kolu
General Information
DistributionPantropical, but presumably of neotropical origin.In the Hawaiian Islands, naturalized on Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.

Erect shrub to 20‒25 dm tall.
Leaves elliptic, short-petiolate; leaflets (7‒)9‒17, opposite, oblong, elliptic, or sometimes elliptic-obovate, 10‒38 mm long, 3‒15 mm wide, adaxial surface glabrous to sparsely strigose, abaxial surface moderately strigose.
Inflorescences a raceme, 2‒4 cm long. Flowers with calyx ca. 1.5 mm long, teeth deltate; corolla salmon pink to red, 4‒6 mm long.
Fruit dark brown, linear, strongly curved upward, 15‒20(‒30) mm long, 2‒3 mm wide, moderately strigillose.
Seeds 4‒6, dark brown, 1.7‒2 mm long, 1.2‒1.5 mm wide.
2n = 12, 16, 32.
Nancy Khan