Corolla long, filiform, limb 4-lobed, the 3 lower lobes ovate, the upper pointed.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera
Style filiform, same length as the stamens.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera
Ovary many-ovuled with filiform style.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera