|. 989 CHARACTERS OF TRIBES AND GENERA. 
158.—CHEILANTHES, Sw. (1806). | 
Hook. Sp. Fil., in part. f 
Vernation fasciculate, erect or decumbent, acaulose, | 
cespitose. Fronds bi-tripinnate, rarely simple pinnate, 
4 to 8 inches or more in height, smooth pilose, glandulose 
or farinose ; ultimate segments often small. Veins forked, 
free. Receptacles terminal, punctiform. Indusiwm reni- 
form and special to each receptacle, or linear, including 
two or more contiguous receptacles, forming round, oblong, ` 
or linear sori. 
Type. Cheilanthes tenuifolia, Swartz. 
Illust. Hook. and Bauer. Gen. Fil., t. 106 B. ; Moore Ind. 
Fil., p. 25 B. and 26; J. Sm. Ferns, Brit. and For., 
fig. 88; Hook. Syn. Fil., t. 3, fig. 95. 
Oss.—This genus consists of about thirty or forty known 
species of slender fronded Ferns, widely spread through 
the tropies and sub-tropical regions of both hemispheres. 
They vary considerably in size and the divisions of the 
Íronds, as also in the indusium being of various forms, 
which in some cases might be considered sufficient to be of ` 
* Adiantopsis, is 
Indusium subrotund or reniform, special to each cluster of ` 
sporangia. Fronds smooth. 
Sp. C. monticola, Gard. ; C. pteroides, Sw.; C. radiata, 
