English: Flowering merrillia; Katinga; Malay lemon.
Malay: Ketenggah; Kemuning gajah.
Clades: Merrilliinae, Aurantioideae.
Region: Malaysia, Thailand, Sumatra, Indonesia.
Habitat: primary and secondary tropical forest.
Content: several coumarins, merrillin; alkaloid yuehchukene.
Use: wood for walking sticks, kris handles, furniture, boxes.

BotanyTree; up to 20 to 30 meters tall
Stem: bark light, flaking; wood, bright yellow with dark brown streaks, hard.
Leaves: 20 cm in long; compound, with 5 to 13 leaflets of 10 cm length, basal ones smaller than the others; thin, bright green, somewhat lance-shaped, triangular bases.
Flowers: solitary, paired, or borne in panicles; white to yellow-green; trumpet-shaped; petals up to 18 mm long.
Fruit: oblong; 11 cm long, 7.5 cm wide; warty peel, 1 cm thick; green, turning yellow when mature; pulp tasteless, fibrous, olive-green.

TaxonomyMerrillia is placed in the tribe Merrilliinae, also called large-fruited remote citroid fruit trees.