Descriptive terminology.

(A) Descriptive terminology for the incorporation process of pigments. ia: incorporation area. ge: growing edge. ip: incorporation phase. (B-E) Examples of incorporation processes. (B) Continuous incorporation of pigments over space and time. (C) Continuous incorporation of pigments over space, along the entire growing edge, and discontinuous and recurrent over time. (D) Discontinuous incorporation of pigments over space, at several areas along the growing edge, and continuous over time. (E) Discontinuous incorporation of pigments over space, and discontinuous and recurrent over time.