(Greek, twin cloak; alluding to the indusium). Polypodiaceae. Greenhouse ferns of rather coarse foliage.

Indusium elliptical, emarginate at the base, attached along a central vein, free all around the margin. - One or

2 species. Large coarse ferns somewhat resembling the shield ferns, Dryopteris, in habit and gross appearance.

D. lunulata is a very distinct fern. It looks like a tree maidenhair, but the stems are thick and fleshy and the leaves are fleshier than any Adiantum. In cultivation the trunk is only a few inches high, but the fronds are 4 to 6 feet long and densely covered with long, brown, chaffy scales and has a metallic luster. This is a warm-house fern, and may be used for subtropical bedding. It has a bad trick of dropping its pinnules if allowed to get too dry at the root, but soon rallies under liberal treatment.


Desv. (D. trunculata, Hort.). Fig. 1260. Leaves clustered from an erect rigid stem, bipinnate, 3-6 ft. long; pinnules almost quadrangular, 3/4-1 in. broad, entire or slightly sinuate, each bearing 2-6 sori. Cuba to Brazil; the same or an allied species in Madagascar and Malaya. -D. lunulata is a very attractive fern while in a small state, but its deciduous articulated pinnules are a drawback as a commercial species, rendering it of little value for house decoration.

L. M. Underwood and

W. H. Taplin.