Walsura pachycaulon is a tree in the family Meliaceae.

[2] Walsura pachycaulon grows up to 29 metres (100 ft) tall, with a bole diameter of up to 25 cm (10 in).

The leaves are oblong to elliptic to oblanceolate and measure up to 19.5 cm (8 in) long.

[2] Walsura pachycaulon is endemic to Borneo.

Its habitat is hill and lowland forests to elevations of about 1,000 m (3,300 ft).