M. barclaiana), commonly called angels trumpet[1] or Mexican viper,[2] is an ornamental plant in the family Plantaginaceae native to Mexico.

Growing to 4 m (13 ft) in height, this herbaceous perennial climber has ivy-like leaves and white, pink or purple tubular flowers that occur in spring and summer.

Its lamina leaves that are triangular-cordate or triangular-hastate, 1–3.5 cm in length and 8–30 mm wide.

Basal lobes are acute or undiscerning, with some margins, and small teeth towards the base.

[4] Since it does not tolerate frost, in cooler temperate climates it is often grown under glass in a conservatory, or alternatively as a tender annual.