Including Euphroniaceae Marcano-Berti, Hirtellaceae Horan. Habit and leaf form . Plants non-succulent . Young stems not breaking easily at the nodes . Self supporting, or climbing.
Leaves stipulate, or exstipulate.
Leaf anatomy . Stem anatomy . Nodes unilacunar, or tri-lacunar. Cortical bundles absent. Medullary bundles absent.