A large genus of Tropical Ferns, few of which are grown in any large quantity. There is great variation in the shape of the fronds, but all agree in having the spore clusters spread over the surface of the fertile ones. Two of the most interesting species are: A. crinitum (fig. 310), from the West Indies, which has large simple fronds, the sterile ones being 12-18 in. long, and covered with long black hairs; and A. peltatum, from Tropical America, a species having fronds only about 3 in. long, divided into numerous narrow segments There are several other species, all requiring stove treatment. They are of no value for market work.

Acrostichum crinitum.

Fig. 310. - Acrostichum crinitum.