Scleromitrion

Scleromitrion is a genus of flowering plants in the family Rubiaceae, native to tropical and subtropical Asia and the western Pacific. The genus was first established in 1834 as a section of the genus Hedyotis, H. sect. Scleromitrion, and was raised to a full genus in 1838.

Species
, Plants of the World Online accepted the following species:
 * Scleromitrion angustifolium (Cham. & Schltdl.) Benth.
 * Scleromitrion brachypodum (DC.) T.C.Hsu
 * Scleromitrion capitatum Miq.
 * Scleromitrion delicatum (Halford) K.L.Gibbons
 * Scleromitrion diffusum (Willd.) R.J.Wang
 * Scleromitrion galioides (F.Muell.) K.L.Gibbons
 * Scleromitrion gibsonii (Halford) K.L.Gibbons
 * Scleromitrion gracilipes (Craib) Neupane & N.Wikstr.
 * Scleromitrion intonsum (Halford) K.L.Gibbons
 * Scleromitrion kerrii (Craib) Wangwasit & Chantar.
 * Scleromitrion koanum (R.J.Wang) R.J.Wang
 * Scleromitrion laceyi (Halford) K.L.Gibbons
 * Scleromitrion largiflorens (Halford) K.L.Gibbons
 * Scleromitrion leptocaule (Halford) K.L.Gibbons
 * Scleromitrion linoides (Griff.) Neupane & N.Wikstr.
 * Scleromitrion pauciflorum (Bartl. ex DC.) Miq.
 * Scleromitrion pinifolium (Wall. ex G.Don) R.J.Wang
 * Scleromitrion polycladum (F.Muell.) K.L.Gibbons
 * Scleromitrion scleranthoides (F.Muell.) K.L.Gibbons
 * Scleromitrion sirayanum T.C.Hsu & Z.H.Chen
 * Scleromitrion subulatum (Korth.) K.L.Gibbons
 * Scleromitrion tenelliflorum (Blume) Korth.
 * Scleromitrion tenuifolium (Burm.f.) K.L.Gibbons
 * Scleromitrion thysanotum (Halford) K.L.Gibbons
 * Scleromitrion verticillatum (L.) R.J.Wang