Latin Name:Cucurbita spp. esp. Cucurbita pepo; Cucurbita maxima; Cucurbita moschata
Family Name: Curcurbitaceae
Squashes are the fruit of the Curcurbita family of plants and while not actually toxic to tortoises, we don't recommend feeding either the leaves or the fruit in any quantity, but the flowers are acceptable in moderation. There is a theory that some members of the squash family have anthelmintic (ability to destroy or expel worms) properties, but there is no hard evidence to substantiate this.
Small amounts of the leaves and flowers will not be harmful to your tortoise, but feed only as small part of a wider diet.