Resak langgung is the vernacular name for Vatica scortechinii (Dipterocarpaceae). This species is named after meranti langgung (Shorea lepidota) as it has large and subfalcate stipules. Vatica scortechinii is endemic to Peninsular Malaysia and is recorded from Kledang Saiong Forest Reserve (FR), Bubu FR (Perak), Kuala Teku in National Park (Pahang) and Terengganu. It inhabits lowland areas up to hill dipterocarp forests at an elevation of 800 m.

The diagnostic character of this species resides in the stipules and leaf. It has large, semi-persistent, subfalcate stipules that are sometimes longer than 2.5 cm. The leaf is elliptic-oblong and is often longer than 18 cm, usually rounded at the base, narrowing to the blunt-acuminate apex, has about 12-14 nerves or more, and is leathery in texture.

This is a medium-sized tree with a girth of about 1.5 m and without buttresses. It has a cylindrical bole with patches of dark brown and pastel shades of white and orange. The flower is pale yellow with a slight pale red patch at the tip. The fruit is about 5 mm long, the nut is globose and is about 15 mm across when ripen.

The species is now threatened by logging activities and land conversion. Under the IUCN Red List of Threatened Species (2008), V. scortechinii is categorized as Endangered (EN B2ab(iii)). Forest Research Institute Malaysia (FRIM) has initiated ex situ collection measures through seed collection, as an initial step towards conserving the species for the future.