384 GENERA OF FERNS. 
taining an oval sporangium, attached by its interior side and 
resupinate. Veins reticulated. 
Habit as in Lygodium; differing in the petiole of the sterile 
pinnules being articulated. 
Species. Lygodictyon Schkuhrii, J. Sm. (Lygodium reti- 
culatum, Schk. Hydroglossum polycarpum, Willd. Ophio- 
glossum scandens, Forst.) 
Illust. Schk. crypt. t. 139. Hook. gen. fil. t. 111. B. 
Obs. Agreeing in habit with the preceding, but differing 
in the reticulated venation and in the petioles being articu- 
lated. 
131. Scuizma, Sw. J. Sm. 
(Lophidium, Rich. Rhipidium, Bernh.) 
Fertile appendices terminal, forming a reflexed pinnate crest 
of linear segments, which have an inflexed indusiiform mar- 
gin. Sporangia oval, vertical, arranged ina compact row on 
each side of the midrib of the segments. 
Rhizoma cespitose. Fronds simple and linear, or unusually 
dichotomously multipartite, or entire and flabellate, each lacinia 
„bearing a pinnate reclinate fertile crest. Segments linear, 
unilateral, vertical, and oppositely conniving. 
Ezamp. 1. S. pectinata, Sm. 2.8. pusilla, Pursh. 3. S. ru- 
pestris, R. Br. 4. S. dichotoma, Sw. 5. S. bifida, Sm. 
6. S. elegans, Sm. 7. S. Flabellum, Mart. 
Illust. Hook. et Bauer, gen. fil. t.19. — 
132. Acrinostacays, Wall. 
(Schizææ sp. Sw. Schk.) 
: Fertile appendices terminal, forming a digitate crest of 
linear segments; their margin reflexed, indusiiform. Spo- 
rangia oval, vertical, arranged in two compact rows on either 
side of the costula of each segment. 
Fronds simple, linear, costate, compressed or triquetrous at 
the base, their apex multipartite or sometimes bifid, forming 
