A few excerpts from Kostermans on M. pentandra if it's any help.
Tree: up to 28m. tall and 90cm dbh. . Crown wide,massive with drooping gnarled thick limbs.
Distribution: In the Malay Peninsula,a formerly common village tree,more rare in North Borneo,perhaps also in Thailand. Wet,evergreen tropical forest,lowlands.
Fruit : oblong,7.5-10 x 5-6.5 cm,green at maturity,rather fragrant,pulp watery,pale orange,sweet,not very fibrous,in young fruit no visible beak Seed small.oblong, 4-5 x 3-3.5 x 1.5-2 cm.flattened with deep furrows and few short fibres.
Notes : In general habit it resembles M. indica but the conspicuous leaf reticulation makes it easy to distinguish.but should not be mistaken for that of M.odorata. The very dense indumentum of the panicles is outstanding.