SPECIAL WAYS OF GROWING FERNS. 113 



white, and covering both the upper and under surface of 

 the fronds ; fr. 10-20 inches long, appearing mouse-colored. 



G.pulchella, Linden (Hk., Fil. Ex., PI. 74). From Venezue- 

 la: powder white; fr. dark green above, 10-30 inches 

 long, 12 inches broad, often forking. A beautiful plant. 

 T. sulphured, Desv. (Lowe, vol. i., PI. 5). From the West 

 Indies : powder bright yellow; fr. 6-10 inches long. 



G. triangularis, Kaulf. (Eaton's Ferns of N. A., to be fig- 

 ured: Hk., Fil. Ex., PI. 10). From California: powder 

 yellow, rarely white ; fr. raised on stalks 3-10 inches long, 

 triangular, 1-3 inches wide. This species requires great 

 care in cultivation. 



G. calomelanos, Kaulf. (Hk., Card., F., PI. 30). From the 

 West Indies: powder white; fr. 10-30 inches long, 3-8 

 inches broad. One of the commonest in cultivation. 



Notholana nivea, Desv. (Lowe, vol. i., PI. 19). From 

 Mexico, &c. : resembles N. dealbata, PI. 2 of this book; 

 powder white ; fr. 4-10 inches long. Easily managed. 



N.fiavens, Moore (Hk., Fil. Ex., PI. 47). From Central 

 America: powder yellow; fr. 6-10 inches long. The 

 same as. TV. chrysophylla, Hort. 



Cheilanthes farinosa, Kaulf. (Hk. and G., Ic. Fil., PI. 134). 

 From the tropics : powder white ; fr. 6-15 inches long. 



Adiantum sulphureum, Kaulf. (Lowe, vol. ix., N. and R. F., 

 PI. 61). Hooker considers this to be a variety of A. 

 &thiopicum, L. From Chili: powder yellow; fr. 6-12 

 inches long. Difficult to manage. 



II. Fronds without any Powder. 



Gymnogramme tomentosa, Desv. Fr. 10-20 inches long; 

 dark, hairy. 



Nctholcena Newberryi, Eaton (Eaton's F. of N. A., to be 

 figured*). From United States: fr. white, woolly, 6-12 

 inches long, about 2 inches broad. A charming plant. 



