1H 



DEVELOPMENT OF 



The bulbs of Iris persica differ from those of the Tulip in that 

 their main axis produces leaves (No. 2), from that of the Hyacinth 

 and Lily in the short duration of its parts, and from that of 

 Tigridia pavonia in that the main bulb is not seated immediately 

 at the base of the peduncle, but in its stead many other leaves. 



Iris persica and I. Xiphium. 



Iris Xiphium bears a great resemblance to I. persica in the 

 structure of its bulbs. In a state of rest (at the end of summer 

 or in autumn) the outermost scales are dry and membranaceous, 

 followed by fleshy scales which have no closed sheath, and which 

 are still perfect at their tips (Fig. 2) ; their margins also are not 

 separated from one another, but that of the one is wrapped for a 

 short distance over that of the other, by which character the bulb 

 of this species may be distinguished from that of I. persica, with 

 which it agrees in size. 



