264 
FERNS : BRITISH AKD 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 pinnae of fertile frond con- 
tracted. (Plenasium.) 
2. O. Claytoniana, Linn. ; Lowe's Feins, 
8, t. 2. 0. interrupta, Michx. ; 
Schk.FiLt.lA4 . — North America. 
*** Terminal pinnae of 
fertile frond contracted. 
(Euosmunda.) 
3. O. regalis, Linn. (Plum. 
Fil.t.B,fA)\ Sclik. 
Fil. t. 145 ; Hook. 
Gen. Fil. t. 46 A ; 
Fug. Bot. t. 209 ; 
Lindl. and Moore’s 
Brit. Ferns, t. 50 ; 
Hook. Brit. Ferns, 
t. 45 ; Sowerby’s 
Feins, t. 44 ; — var. 
cristatns, Moore, 
in Gard. Chron. 
(1863). — North 
Temperate Zone, 
Genus 148.— Pinnule of barren frond, and -p -i 
fertile spike.natural size. No. 3. X>1 nru. 
4. O. spectabilis, Willd. O. regalis, var. /3, Linn . — North 
America. 
5. O. gracilis, Link . — North America. 
149. TODEA, Willd. 
Vernation asciculate, erect, sub-arboreous. Fronds bipinna- 
tifid, 2-6 feet high; pinnae coriaceous or membranaceous; 
fertile frond sub-contracted. Veins forked ; venules free. 
