Slender, perennial herb, 15-40 cm tall, the underground parts not scaly; Leaves mostly opposite, alternate in and near the inflorescence, the upper ones reduced, strigulose along the veins and margins especially below, the nerves evident, very narrowly elliptic or linear, 1—3(—4) by 0.1-0.5 cm, weakly and sparsely serrulate; Inflorescence slightly nodding. Flowers erect, borne in the axils of reduced upper leaves. Sepals 3-4 by 1.2-1.6 mm. Petals narrowly obovate, 3.3-4.5 by c. 2 mm, white or pale pink, the notch c. 1 mm deep. Capsule glabrescent, 3-5 cm long, on a pedicel 0-1.8 cm. Seeds 0.8-1 by 0.3-0.4 mm, papillose, not beaked, obovoid, blunt at both ends, the coma 4-6 mm long, white.
Asia-Temperate, Asia-Tropical: Philippines (Philippines present), Benguet Prov present, Hupeh present, Japan present, Kiangsu present, N. Luzon present, Panay present, Southern America: Argentina Northeast (Formosa present)
Japan, China (Hupeh, Kiangsu), Formosa, and Malesia: Philippines (N. Luzon: Benguet Prov.; Panay: BS 31439).
I can find no difference between the species generally known as E. formosanum and the supposed Philippine endemic populations of E. philippinense. This species is apparently not common on the Asian mainland.