TAB. LXIY. 
Hymenophyllum UNDULATUM, StV. 
Humile pendens, frondibus oblongis ovatisve tri-quadripinna- 
tifidis inferne nunc pinnatis, lobis primariis patentibus, 
ultimis brevibus subpatentibus oblongis integerrimis obtusis 
vel emarginatis omnibus undulato-crispatis, rachibus alatis 
undulatis yalde crispatis, inyolucris raris in lobos breves 
terminalibus liberis orbiculari-ovatis usque ad basin bival- 
vibus, valvis convexis integerrimis, stipitibus gracilibus 
nudis. 
Hymenophyllum undulatum, Sw. FI. Ind. Occ. p. 1751. Syn. 
Fil, p. 148. Willd. Sp. FI. 5. p. 533. Hedw. Fil. cum Ic . 
Hook. Gen. et Sp. Fil. 1 . p. 105. 
Hab. Jamaica, Swartz , Menzies. Mountains of Andinarca, 
Peru, Mathews. 
A very distinct species. The stipes varies from one to 
three inches long. Fronds three four or five inches long, in 
every part beautifully and regularly undulato-crispate. 
Fig. 1. Portion of a fertile frond : — magnified, f. 2. In- 
volucre, from which one valve is removed : — magnified. 
