640 ARACE^E. 



been observed to evolve a considerable quantity of 

 heat from the spadix at the time of the expansion of 

 the sheath. 



1.- ARUM (Cuckoo-pint). Flowers on a club-shaped 

 spadix, which is naked above, and enclosed in a 

 convolute sheath. (Name, the Greek name of the 

 plant.) 



ARUM MACULATUM (Cuckoo-pint, Wake-Robin, Lords-and-Ladies). 



1. ARUM (Cuckoo-pint). 



1. A. maculdtum (Cuckoo-pint, Wake-Bobin, Lords- 

 and-Ladies). The only British species. Hedges and 



