Barbotine is a technique of pottery decoration involving the application of a slip to the pot, not in an even layer but in the form of thick incrustations in patches or trails. This effect is achieved either by repeated brush strokes with a thin slip or by using a thicker slip for the decoration.
The Torquay potteries used this technique extensively in "floral" pots which depicted naturalistic flowers.
Schelby Scherr, NATS Past President has an exceptional collection of daffodil pots. See the pictures taken at her 2007 Open House