31 



* ECHINOCACTUS Eyriesii, vdr. glaucus. 



Glaucous Sweet-scented Porcupine Cactus. 



ICOSANDRIA MONOGYNIA. 



Nat. ord. CactacEjE. 



ECHINOCACTUS. Bot. Reg. vol. 20. fol. 1707. 



E. Eyriesii. Supra I. c. 



Var. glaucus ; angulis acutioribus, spinis magis fuscis et tenuioribus, tubo 

 calycis viridi glabriusculo. 



There is a specimen of this pretty plant in the garden 

 of the Horticultural Society, but its origin is not known. 

 It is very similar to the E. Eyriesii figured in the 20th 

 volume of this work, fol. 1707 ; but differs in having the 

 angles much more acute and less wavy ; the spines are 

 longer, more slender, and rather browner, and the tube of 

 the flower is shorter, green, and free from the long coarse 

 ash-coloured shagginess which distinguishes the original 

 species. 



There seems to be no trace of it in the works of conti- 

 nental writers. It is not mentioned in the recent catalogue 

 of Dr. Louis PfeifTer, nor do I succeed in referring it to any 

 species mentioned in the writings of more technical botanists. 

 The flowers are sweet-scented, and appear in July. 



The division of Cactacese to which this belongs should 

 be treated in a somewhat different manner from the more 

 common kinds. The soil should neither be very rich nor 

 retentive of moisture ; broken bricks or lime-rubbish, mixed 

 with a little leaf-mould, answers the purpose very well. 

 Water should never be given over-head, because in that case 



See Bot. Reg. vol. xx. fol. 1707. 



