Kalak or large-leaved uvaria (Uvaria littoralis) is a species of plant in Annonaceae, shrub or small tree, erect, woody, young branches are blackish brown with white spots, growing in clumps on the shaded forest floor, in teak forests, clay soil, limestone and rocky rocks.
U. littoralis has leaves in rows along the branches, zigzag, very short stalks and sitting alternately. The leaf blade is up to 25 cm long, up to 10 cm wide, pointed tip, heart base, a main vein in the middle with many small pinnate veins.
Fan-shaped flowers, blood red, yellow center. Fruits grow at the end of the bunch and radial with a 1-2 cm long stalk. Young fruit is round and yellow, ripe fruit is oval or elongated and red to blackish blue.
Kingdom: Plantae
Phylum: Tracheophyta
Subphylum: Angiospermae
Class: Magnoliopsida
Order: Magnoliales
Family: Annonaceae
Tribe: Uvarieae
Genus: Uvaria
Species: Uvaria littoralis