Flora of the Hawaiian Islands
Dicotyledon Literature for Heliotropium amplexicaule
Wagner et al., 1990, 1999.
   Heliotropiaceae Bibliography
      Heliotropium amplexicaule
General Information
DistributionNative to Argentina and Uruguay, now widely naturalized.In the Hawaiian Islands, naturalized on O`ahu, Moloka`i, Maui, Hawai`i.

Perennial herbs 2-5 dm tall, from deep woody taproots, glandular puberulent and hirsute.
Leaves oblong to oblanceolate, 2-6(-9) cm long, 0.4-2 cm wide, rugose, margins entire to sinuate, subsessile.
Flowers sessile in terminal or lateral clusters of 2-5 bracteate, scorpioid cymes, peduncles 1-10 cm long; calyx persistent, the lobes linear to lanceolate, 2.5-5 mm long, spreading in fruit, glandular puberulent and sparsely hirsute; corolla blue, purple, or rarely white, 5-6 mm long, the tube ca. 5 mm long, sparsely hirsute externally.
Fruit breaking up into 2 2-seeded nutlets 2-3 mm long, glabrous.