264 



TERNS : BRITISH AND FOREIGN. 



* Fertile frond wholly contracted. (Osmundastrum.) 



1. O. cinnamomea, Linn.; Sclik. Fil. 



t. 146 ; Hook. Gard. Ferns, t. 45; 

 Lowe's Ferns, 8, 1. 1. North and 

 South America, East Indies. 



** Lateral pinnos of fertile frond con- 

 tracted. (Plenadium.) 



2. O. Clay ton iana, Linn. ; Lowe's Ferns t 



8, t. 2. 0. interrupta, Miclix.; 

 a44. North America. 



*** Terminal pinnoB of 



fertile frond contracted. 



(Euosmunda.) 



3. O. regalis, Linn. (Plum. 

 FiU.B,fA);ScMc. 

 Fil. .145; Hook. 

 Gen. Fil. t. 46 A ; 

 Eng. Sot. t. 209 ; 

 Lindl. and Moore's 

 'Brit. Ferns, t. 50 ; 

 Hook. Brit. Ferns, 

 t. 45 ; Sowerby's 

 Ferns, t. 44 ; var. 

 cristatus, Moore, 

 in Gard. Ghron. 

 (1863). North 

 Temperate Zone, 

 Brazil. 



Genus 148. Pinnule of barren frond, and 

 fertile spike, natural size. No. 3. 



4. O. spectabilis, Willd. 0. regalis, var. /3, Linn. North 



America. 



5. O. gracilis, Link. North America. 



149. TODEA, Willd. 



Vernation asciculate, erect, sub-arboreous. Fronds bipinna- 

 tifid, 26 feet high; pinnaa coriaceous or membranaceous; 

 fertile frond sub-contracted. Veins forked; venules free. 



