Devario kysonensis, originally described from Vietnam without essential details, is redescribed and reported for the first time from Laos. It is distinguished from all other species of the genus by its unique colour pattern in adults, made of two or three rows of black irregularly shaped spots on the flank.

The deep-water spider crab, Pleistacantha rubida (Alcock, 1895) is known only from the description and figures of the female holotype from the Andaman Sea, and has been variously regarded as a valid species or as a synonym of Pleistacantha oryx (Ortmann, 1893) (type locality: Japan). Pleistacantha rubida is redescribed and refigured based on the holotype and confirmed as a valid species, distinct from P. oryx. Although the two species are similar in most respects, restudy of the holotype of P. rubida shows that it clearly differs from P. oryx in the ornamentation of the anterolateral margins of the buccal cavity and rostral proportions. Pleistacantha rubida is one of three species of the genus known from Indian waters.

Plukenetia corniculata (Euphorbiaceae) has been rediscovered for Singapore. Taxonomic notes, a description of the plant and proposed conservation measures for the species are discussed, and a lectotype is designated for this species.

Calamus densiflorus is a new record for Singapore after its rediscovery in the Rifle Range Road area in 2016. Its description, distribution and distinct vegetative characters are provided.

Ficus delosyce Corner, a hemiepiphytic strangler fig, was presumed nationally extinct in Singapore. It was recently encountered and rediscovered in Nee Soon Swamp Forest and at MacRitchie Reservoir, and assigned the national conservation status of critically endangered.