very pretty species, more remarkable for the rose-red colour 

 of the flowers, than for any other striking peculiarity. 



Descr. Plant nearly globose, sessile, about two inches 

 across, depressed and umbilicate at the top, deeply marked 

 with about twelve furrows, which are sharp in their sinuses, 

 and as many prominent, obtuse ribs : of a glaucous-green 

 tint Ribs lobed, or remotely crenate, distantly beset with 

 pulvinuli or little woolly tufts or areolae, from which rise 

 about six, slightly curved, spreading, rather stout spines, 

 each half an inch long, or a little more. The flowers are large 

 in proportion to the size of the plant, and spring from the 

 sides upon the ribs, solitary., but three or four are expanded 

 on one specimen at the same time. Calyx-tube green, 

 becoming yellow above, and beset with small, pilose, and 

 ciliated scales : limb of the calyx yellow-red upwards and 

 within. Petals deep rose colour. Stamens numerous, 

 nearly white. 



Fig. 1. Fruit. 2. Side view of the Spines : — magnified 



