Neonauclea calycina (DC) Merr., J. Wash. Acad. Sci. 5 (1915)

Synonyms
Bancalus peduncularis (Wall.) O.Ktze
Nauclea blancoi Vidal
Nauclea callophylla Blume ex Miq.
Nauclea calycina Bartling ex DC
Nauclea imbricata Blume ex Miq.
Nauclea monocephala Merr.
Nauclea pallida Blume ex Miq.
Nauclea peduncularis Wall.
Nauclea purpurascens Korth.
Neonauclea monocephala (Merr.) Merr.
Neonauclea peduncularis (Wall.) Merr.
Neonauclea purpurascens (Korth.) Ridl.

Description
Mid-canopy tree up to 34 m tall and 54 cm dbh. Stipules ca. 10 mm long, rounded tip, dropped early. Leaves opposite, simple, penni-veined, glabrous. Flowers ca. 3 mm diameter, white, with corolla tubes, placed in globose flower heads. Fruits ca. 22 mm diameter, yellow-brown, fused into rounded fruiting body.

Ecology
In undisturbed to slightly disturbed (open) mixed dipterocarp and sub-montane forests up to 1600 m altitude. Often on alluvial sites and along rivers and streams, also on hillsides. On poor sandy soils, also on ultrabasic and ultramafic soils. In secondary forests usually present as a pre-disturbance remnant.

Distribution
Burma, Indo-China, Thailand, Peninsular Malaysia, Sumatra, Java, Lesser Sunda Islands, Borneo (Sabah, East-Kalimantan), Philippines, Celebes.