Hydnophytum longistylum.

Hydnophytum longistylum.

Observation - Hydnophytum longistylum. - Global. Description: The tuber has entrance holes reminiscent of Hydnophytum ferrugineum an Australian endemic. Note also that the plant has some unusual 'bubbled' roots that are probably also ant domatia (little homes.)

H. longistylum Becc. (Odoardo Beccari) in Malesia Raccolta 2, p152, (1885).
(Malesia 2) http://www.biodiversitylibrary.org/page/44197923#page/266/mode/1up.
image http://www.biodiversitylibrary.org/page/44197923#page/163/mode/1up.
Merr. & L. M. Perry. (Elmer Drew Merrill & Lily May Perry) in Journal of the Arnold Arboretum, vol 26, p18, (1945).
(J. Arnold Arbor.)http://www.biodiversitylibrary.org/page/8443412#page/22/mode/1up.
The tuber has entrance holes reminiscent of Hydnophytum ferrugineum an Australian endemic. Note also that the plant has some unusual 'bubbled' roots that are probably also ant domatia (little homes.) Although externally Bougainville plants are quite different to H. moseleyanum, there are hints on herbarium sheets that H longistylum is to be subsumed under the former name when the long awaited Hydnophytum revision is published.
http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000772003.