[45.] Interrupted Compounds. Benjamin Drew says, in Pens and Types: When two words connected by a conjunction are severally compound parts of a following word, the hyphen is omitted, as:

We use cast and wrought iron pillars.

I have pruned my peach and apple trees.

Some authors follow the German style, inserting the hyphens, thus:

We use cast- and wrought-iron pillars.

I have pruned my peach- and apple-trees.