128 FERNS IN THEIR HOMES AND OURS. 



must be 75 and their winter 65. As these 

 plants have so much longer been the subjects 

 of experiment in England than in this country, 

 we can do no better than to examine this list, a 

 portion of which is here given. Among the 

 former are 



Alsophila australis, Br., S. America. 



Alsophila Cooperi, Hk., Queensland. 



Alsophila excelsa, Br., Norfolk Island. 



Dicksonia antarctica, Labill., Australia. 



Dicksonia arborescens, L'Herit., St. Helena. 



Dicksonia Jibrosa, Col., New Zealand. 



Dicksonia lanata, Col., New Zealand. 



Dicksonia squarrosa, Siu., New Zealand. 



Dicksonia (Cibotiuni) Barometz, Link, China. 



Dicksonia (Cibotium} Menziesii, Hk., Sandwich Islands. 



Cyathea dealbata, Sw. 9 New Zealand, &c. 



Cyathea medullaris, Sw., New Zealand. 



Thyrsopteris elegans, Kunze, Juan Fernandez. 



Among the latter which require the warmer 

 temperature he mentions 



Alsophila aspera, Br., Tropical America. 



Alsophila procera, Kaulf., Brazil. 



Alsophila radens, Kaulf., Brazil. 



Alsophila pruinata, Kaulf., West Indies. 



Alsophila ferox, Presl (aculeata of some authors), West 



Indies, &c. 



Alsophila armata, Presl, Tropical America. 

 Alsophila glabra, Hk. (gigantea of some authors), East 



India. 



