236 
FERNS : BEITISH AND FOREIGN. 
1-2| feet long. Veins pinnate; venules free. Receptacles 
punctiform, terminal. Sori exserted. Special and accessory 
indusia conniving, and forming a calyciform, pedicellate, vertical 
extrorse cyst. 
1. D. prolifer a, Hook, et Grev. Ic. Fil. ( corriy .) ; Hook. Gen. 
Fit. A 44 B ; Hook. Fil. Exot. t. 82; Lowe’s Ferns, 8, 
t. 38. Dicksonia prolifera, Kaulf. Deparia Macraei, 
Hook, et Grev. Ic. Fil. 1 . 154. — Sandwich Islands. 
125. SITOLOBIUM, Besv. 
Vernation uniserial and sarmentose. Fronds bi-tripinnatifid, 
2-6 feet high. Veins simple or pin- 
nately forked, the exterior venule, or 
more, soriferous. Receptacles punc- 
tiform, terminal. Sori globose, re- 
flexed. Special and accessory indusia 
united and forming a reflexed, entire, 
or sub-bilabiate cup. 
1. S. punctilobum, J. Sm. Ne- 
phrodium punctilobulum, 
Michx. Aspidium punctilo- 
bulum, Sw. Dicksonia punc- 
tiloba, Hook.; Lowe’s 
Ferns, 8, t. 42. Dicksonia 
pubescens, Sclik. Fil. 1 . 131. 
Dicksonia pilosiuscula, 
Willd. Sitolobium pilo- 
siusculum, Besv. ; J. Sm. 
Gen. Fil. Dennstaedtia 
punctilobula, Moore . — 
North America. 
S. adiantoid.es, J. Sm. Dick- 
sonia adiantoides, Humb. ; 
Hook. Sp. Fil. t. 26 B. 
Polypodium globuliferum, 
Poir (Plum. Fil. t. 30). 
Dennstaedtia adiantoides, 
Moore. — Tropic al America. 
Genus 125. — Portion of fertile 
frond, under side. No. 2. 
