f 



■ ? 



1 





4 * 



^ 



\ r 





.*»* 



J ri 



'-.V 



i*-"' 



AT... 





Hi* 





■h 





■sV 



' 1_ 



■■ TI_ 





^ . 



t^-^ 



W ^ 



^t^-, 



^ 



1» 



.*- ■- 



■Ij' 



■t . ? - 



hS: 



F. - 



NOPALfiA. 



33 



kuntzei. from 



Schumann in 1897.' 



Opuntia alpina ( 

 given as a synonym 



Enum 



Schumann referred both 



pi 



Op 



Monatsschr. Kakteenk 



as Pterocactus kuntzei: 



decip 



Figure 36 shows a seed of a plant, collected by Dr. Rose near Mendoza, Argentina, 



m 1915; 



from 



Dr 



. r 



f 

 ^ ■_ 





"^ 

 ^ 







iV 





i< -^ ■■ .-f r-b" t -^ -^ ^ -= \ ^ " ■ ■■■ ■"■ '■ '■;* ''■■ ■" V- ■■■- ■■'■^' 



-- ^.. v.." . X ^ !f ^.--^ 



^ y - \ ^ h. .' ^ . -v r . H ^ - V ^ . 



'.;■-.■ '. j^K- ■*^ ;"%■■? ■■>■■-■ ■-:>'> 



..'< 



Fig. 38. — Pterocactus tuberosus. 



NOPALEA 



1S49. 63. 1850. 



Much branched cacti with definite cylindric trunks; roots so far as knovvn ^brou^' .^//";;^^^^^^^^^ 

 joints flattened, fleshy, often narrow; glochids usually less abundant than in OP^''^'''XZl.^hHl 

 or in clusters at the arioles, sheathless ; leaves small, subterete, soon deciduous; a^e«'f^^J'"S;/"^ 

 wool, glochids, and often spines; flowers originating in the areoles usually ^^.^{^^.^'l^^f^^^^ 

 joints; sepals ovate, erect; petals red or pinkish, erect close y appressed fg^^"^^ ^^^ ""'"^^^ 

 stamens and the style; filaments and style slender, much Ion p^er than the petals, ovary more or less 

 tuberculate, naked or spiny, with a very deep umbilicus; 

 spineless; seeds numerous, flat, covered by a hard bony aril. 



berry 



Nopalea is closely related to Opuntia, with which it is sometimes 



filaments and style are constant in ^opalea, how 



Salm 



cochenillifi 



Karl Schumann described five species in his monograpn, ou. mu.c ..... -'-.;^';:- 

 N. ,unir^.nl....;. .„A AT /„... li.vP been described by Dr. Rose, and one Nina per ta 



Griffiths. N. moniliformis (Linnaeus) Schumann 



The 



ij 



Mexico 



observed 



Some of them 



L'* 



.i 



u _ 



■ ' "i 



4 ■ 



