Hydnocarpus alcalae C.DC.

Hydnocarpus alcalae C.DC.





Vernacular Names

Philippines Dudoa (Bikol).

Geographical Distributions

Hydnocarpus alcalae is found in Philippines (southern Luzon), but planted and naturalised elsewhere in Malesia.


Hydnocarpus alcalae is a small tree or shrub that can reach up to 4-7 m tall and with smooth branches.

The leaves are ovate-oblong, measuring 15-25 cm x 7-11 cm, subcoriaceous, with very asymmetrical base and acuminate at apex.

The inflorescence is a pseudo-racemose panicle measuring 15-30(-60) cm long. The male inflorescence is in fascicles of 3-4 while the female inflorescence is solitary, cauliflorous or ramiflorous. The flowers are 5-merous, greenish white or cream.

The fruit is obovoid, pendent, measuring 15-31 cm x 8-15(-20) cm, and dark brown with purple and greenish spots. The exocarp is 0.3-0.7 mm thick while the stony mesocarp is 6 mm thick. The soft endocarp is 7 mm thick and with 80-110 seeds.

The seeds are nearly globular or ellipsoidal, measuring 3-5 cm x 2.5-3 cm, with a pale yellow aril, and embedded in a fragrant and astringent pulp.

Ecology / Cultivation

Hydnocarpus alcalae occurs naturally in moist ravines.

Line Drawing / Photograph



  1. Plant Resources of South-East Asia No. 12(1): Medicinal and poisonous plants 1.