Flora of the Hawaiian Islands
Dicotyledon Literature for Syzygium cumini
Lorence & Wagner, 2020.
   Myrtaceae -- The Myrtle Family Bibliography
      Syzygium cumini

Common name(s): jambolan plum, java plum
General Information
DistributionProbably native to India, Ceylon, and Malesia, but it may have expanded to much of this range via humans, now widely cultivated and naturalized in many tropical areas.In the Hawaiian Islands, naturalized on Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i.

Tree, 6‒20 m tall, bark pale yellowish brown, smooth to flaking, glabrous throughout.
Leaves petiolate; blade thin, coriaceous, lanceolate to narrowly ovate or elliptic, 7‒19 cm long, 2.5‒11 cm wide, secondary veins (15‒)25‒40 on each side, ca. 2‒5 mm apart, submarginal vein slightly irregular, apex bluntly acuminate to cuspidate, base broadly cuneate; petiole 0.8‒3.5 cm long.
Inflorescences a compound cyme, 5‒10 cm long, arising along previous year's branches, but also axillary or terminal, peduncle 1‒3.5 cm long; bracts 1‒1.5 mm long. Flowers with campanulate hypanthium, 3‒5 mm long, narrowing into a pseudopedicel, 1‒2 mm long; sepals 4, caducous, ca. 4 mm long; petals 4, white, connate, falling as a calyptra at anthesis, ca. 4 mm long; stamens ca. 100, filaments white or pale pink, 4‒6 mm long.
Fruit dark purple or black, glossy, oblong to oblong-ellipsoid, asymmetrical, 1.2‒3 cm long, pericarp pulpy, ca. 1.5‒3 mm thick.
Seed usually 1, ellipsoid to oblong-ellipsoid, 0.5‒1.5 cm in diameter, testa closely coherent to cotyledons.
2n = 22, 33, 42 44, 46, 55, 66.
Nancy Khan