  In this article we investigate the semiflow properties of a class of
state-dependent delay differential equations which is motivated by some models
describing the dynamics of the number of adult trees in forests. We investigate
the existence and uniqueness of a semiflow in the space of Lipschitz and $C^1$
weighted functions. We obtain a blow-up result when the time approaches the
maximal time of existence. We conclude the paper with an application of a
spatially structured forest model.
