Herbs, mostly branched. Leaves sessile. Flowers axillary, solitary, 4-merous; calyx tube coriaceous, rigid, 8-ribbed, calyx lobes 4, valvate, with transverse secondary veins; corolla funnel-shaped, 4-lobed; stamens 4, sometimes slightly didynamous, anthers ellipsoid; pollen in monads; style with tendency to heterostyly, stigma 2-lobed. Fruit a capsule, not longer than calyx tube, with 2flat valves, which open widely; seeds reticulate.
Neurotheca in Gen. Pl. 2: 812. 1876 sec. by Marion J. Jansen-Jacobs. - Neurotheca in JEANETTE ALLOGIO, LAURA COBB, JASON R. GRANT, MARION J. JANSEN-JACOBS, MATT KINKADE, KATHERINE B. LEPIS, HILTJE MAAS-VAN DE KAMER, PAUL J.M. MAAS, MATTHEW I. PALMER & S. MOTA DE OLIVEIRA, FLORA OF THE GUIANAS, Series A: Phanerogams Fascicle 30 139. GENTIANACEAE. 2012