Lasianthus attenuatus Jack

Zhu, H., Roos, M. C. & Ridsdale, C. E., 2012, A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae), Blumea 57 (1), pp. 1-102 : 13

6. Lasianthus attenuatus Jack

Key to the varieties

1. Leaves oblong, more than 2 cm broad; stipules triangular or ovate-lanceolate, 2– 3 mm long; bracts 6–15 mm long; corolla 10–12 mm long............. a. var. attenuatus

1. Leaves linear-oblong, less than 2 cm broad; stipules triangular-lanceolate, 5– 8 mm long; bracts 5 mm long; corolla 8 mm long........................... b. var. minor