16 STUDIES IN INDIAN TOBACCOS. 



diameter, however, varies considerably and three classes can be 

 distinguished : — 



1. Slender flowers in which the maximum diameter of the 

 calyx is 10mm. or less. The buds of" these narrow flowers are 

 very pointed. 



2. Medium flowers in which the diameter varies from 1 1 

 to 14mm, 



3. Broad flowers in which the diameter is 1 5mm. or more. 

 In these the calyx is loose and baggy, and the diameter is about 

 2mm. more than the corolla, and to this is due the peculiar appear- 

 ance of the flowers of this class. 



Calyx. — The relative length of the calyx and corolla varies. 

 The persistent gamosepalous calyx has five teeth, the posterior 

 one of which is always longer than the rest. The remaining four 

 are more or less uneven. The length of the teeth as well as 

 their shape varies. They may be short and obtuse or long and 

 somewhat acute. As a rule, the midrib of the sepals is inconspic- 

 uous, but in type I it is well marked as a dark green ridge. In 

 shape the calyx varies from tubular to globular. In the former 

 case the flower has a straight appearance, while in the latter there 

 is a distinct median constriction. In some types the calyx is 

 exceedingly loose and baggy and has a much greater diameter 

 than the corolla. 



Coi'olla. — The general appearance of the limb of the corolla 

 as seen in the front view of the fully-opened flower varies. It 

 may be either quite flat and sometimes also reflexed, in which 

 case the lobes are generallj^ somewhat rounded, or it may never be 

 fully expanded, in which case the lobes may be ovate, ver}^ distinct 

 and with the edges curved inwards, or the limb u\?iy present a 

 wavy, undulating appearance which has been shortly designated 

 as " crumpled " in the descriptions of the types given below. The 

 outline of the limb vanes. The divisions between the petals may 

 be very small, a condition usually found when the limb is flat, or 

 the lobes may be rounded and more strongly marked or the limb 

 may be still more deeply cut when the lobes are more or less 

 pointed. There is an apical point to the petals which is much 



