1) Having two lips 2) Lipped 1) Lipped 
having two lips; e.g. the form of the petals in many irregular flowers.
• (a.) Having two lips, as the corols of certain flowers.
two-lipped
Two-lipped.
Two-lipped, for example of a corolla in which fusion of an anterior group and a posterior group of petals extends beyond the top of the corolla tube. ... (09 Oct 1997) ... 
two-lipped
Two-lipped.
Bi·la'bi·ate adjective [ Prefix bi- + labiate .] (Botany) Having two lips, as the corols of certain flowers. 
Two-lipped, double-lipped.
[adj] - (botany) having two lips
two-lipped adjective having two lips; `the corolla of a snapdragon is bilabiate`
two-lipped, as a corolla. See illus. under