Description from Flora of China Ganitrus Gaertner; Monocera
Jack. Trees or rarely shrubs. Leaves alternate or spirally
arranged; stipules linear or rarely leaflike, caducous, rarely
persistent; petiole usually long and swollen at both ends; leaf
blade margin serrate or entire, pinnately veined. Inflorescence
axillary, racemose. Flowers bisexual, 4- or 5-merous. Sepals 4
or 5, valvate, abaxially usually pubescent. Petals 4 or 5,
white, free, margin laciniate, rarely entire or lobed. Stamens 8
to numerous; filaments short; anthers 2-celled, dehiscing from
apical slits, with awn or hairs at tip. Disk usually glandularly
5-10-lobed, rarely circular. Ovary superior, 2-5(-7)-loculed;
ovules 2-12 per locule; style linear or subulate. Fruit a drupe,
1(or 5)-loculed; endocarp hard, bony, surface usually lacunose.
Seeds usually 1 per locule, with fleshy endosperm; cotyledons
thin; embryo straight or curved. About 360 species: primarily in
the Old World tropics; 39 species (14 endemic) in China.