Goniothalamus malayanus

Goniothalamus malayanus is a species of plant in the family Annonaceae. It is native to Borneo, the Malay Peninsula, the Nicobar Islands, Sumatra and Thailand. Bioactive molecules extracted from its tissues have been reported to have antibacterial activity in tests with Gram positive and Gram negative bacteria.

Description
It is a tree reaching 15 to 20 feet in height.  Its bark is finely wrinkled and light colored with parts covered in greenish-brown hair.  It has oblong leaves that come to a point at their tip.  The underside of the leaves are pale.  It has green, solitary flowers.  It has hairy sepals that are oval and come to a point at their tip.  Its outer petals have small dark hairs and are 1 to 1.25 inches long.  Its inner leaves have light colored hair and are 0.3 to 0.4 inches long.  It has numerous stamens.  Its fruit is round and hairy.

Reproductive biology
The pollen of G. malayanus  is shed as permanent tetrads.

References

malayanus
Category:Flora of the Andaman and Nicobar Islands
Category:Flora of Borneo
Category:Flora of Malaya
Category:Flora of Sumatra
Category:Flora of Thailand