Spathiostemon moniliformis is a plant that can grow as a shrub or a tree in the Euphorbiaceae family, Acalypheae tribe.

[1][2] Leaves are rarely ovate tending usually to elliptic, some 6.2-26.5 x 2.3-9.5 cm in size, on both sides they are smooth and glabrous.

The species is distinguished from its sister taxa Spathiostemon javensis by the following traits: Glabrous petioles; the leaves do not have domatia; the inflorescences are glabrous, and the staminate inflorescences are from 6 to 28 cm long; the pistillate flowers have sepals in 2 whorls of 3; the ovary and fruit are smooth.

[4][1] Kha khao and khan laen are names used for this species in Surat Thani Province, Thailand.

[1] The English botanist Herbert Kenneth Airy Shaw, who worked extensively on tropical Asian botany and entomology, described the species in 1962, in the Kew Bulletin.