Mirabilis tenuiloba common names longlobe four o'clock[1] or maravilla, is a plant species native to the south-western United States and north-eastern Mexico.

It has been reported from Baja California, Baja California Sur, southern California (Riverside, San Bernardino, San Diego and Imperial Counties) and Arizona (Pima and Yuma Counties).

[2][3] Mirabilis tenuiloba is a perennial herb up to 100 cm tall, usually with many glandular hairs.

Flowers are trumpet-shaped or bell-shaped, white or pale pink, up to 18 mm long.

Fruits are egg-shaped, dark red-brown, up to 6 mm long.