GAKDEX. 



There are not a great number of Foreign ferns which may be 

 thoroughly depended upon to live out of doors during the winter. 

 There are three Osmundas. The O. gracilis (fig. 88 1), which, grown out of 



FIG. 880. Adder's Tongue. 



FIG. 879. Moon Wort. 



FIG. 881. Osiminda gracilis. 



doors in full sunshine, looks like a ridiculous, diminutive, stiff plant of the 

 O. regalis, is drooping and more elegant when grown in a greenhouse. 

 The O. cinnamomea and the O. intermpta are also more beautiful when 

 grown in a greenhouse than when planted out of doors. The O. inter- 

 rupta (fig. 882) is one of the most beautiful of all ferns when well 

 grown. The fertile fronds are green for the upper few inches, then 



FIG. 882. O. interrupta. 



Fro. 883. Cystopteris hulbifera. 



the fructification appears, and, lastly, the remainder of the frond is 

 green. The outer, or non-fertile fronds, form a series of curved lines 



