In the Philippines, the "yellow flower" is source of common confusion, especially when it refers to the "yellow bell." and "kampanilya." Kampanilya is a shared common name of two species of plant: (1) Thevetia peruviana, campanilla, campanero and (2) Allamanda cathartica, campanilla, kampanero, goldfen trumpet. Both are referred to as "yellow bell."

Campanero
Thevetia peruviana Merr.

Other scientific names  Common names 
Cerbera thevetia Linn. Campanilla (Span., Tag.) 
Cerbera peruviana Pers. Campanero (Span., Tag.) 
Thevetia nereifolia Juss. Narciso amarillo(Span.) 
  Yellow bell (Engl.)
  Yellow oleander (Engl.)
  Lucky nut (Engl.)



Botany
Small, erect and branched shrub, growing to a heigh of 3-4 meters. Leaves are linear, glossy and green, 10-15 cm long. Calyx teeth are pointed, 7-9 mm long and green. Corolla is funnel- or bell-shapped, abiout 5 cm wide, 7 cm long, and yellow. The fruit is hard, angled and green, 3-4 cm in diameter.

Distribution
Widely scattered cultivation as an ornamental plant.
Native to South America.

Parts utilized:
Leaves and bark.

 Properties and constituents
Seeds contain a toxic glucoside, thevetin>
Seeds yield a fixed oil containing triloein 63%, tripalmitin and stearin, 37%.
Thevetin has been classified with the digitaline group so activity on the heart muscle, blood pressure elevation, heart irregularities. It also causes increased intestinal peristalsis, increased salivation, and pupil contraction.
Bark is emetic, febrifuge, and antiperiodic.
Leaves are cathartic.
Milky juice is poisonous and vesicant.

Folkloric uses
In some countries, seeds are chewed for a drastic emetic effect.
Seeds also used as abortifacient.
Oil is used externally for skin ailments.

Availability
Ornamental cultivation.
Wildcrafted.