Lee and Kennedy at Hammersmith, where it bears the name 

 here retained. It is, probably, a native of Mexico, and 

 flowers with us in June. 



Descr. Our plant is as large as a moderately sized 

 apple, globose, but depressed at the summit, and contract- 

 ed at the base, of a singularly pale glaucous hue. At the 

 contraction, the tubercles, or mammillce, are flattened, and 

 lengthened out transversely ; the rest are prominent, sub- 

 hemispherical, but obtusely quadrangular and umbilicated 

 at the top, whence, in the upper ones, arises a fascicle of 

 from three to five erect, slender, almost filiform spines, 

 about four times the length of the mammillae ; the rest of the 

 mammillae are spineless, the spines being deciduous. Flowers 

 from the upper part of the plant, among the spine-bearing 

 mammillae, of a moderate size, about an inch in diameter. 

 The petals are of a pale yellow or straw-colour, on the 

 outside tipped with red. Anthers and stigmas yellow. 



Fig. 1. 2. Mammillae, with Spines, from the upper part of the plant :— 

 magnified. 



