36 



PAPILIONACEOUS FLOWERS. 



[part I. 



in retaining the great number of genera included 

 in this order, various methods have been devised 

 of re-dividing it ; and of these I shall adopt the 

 newest, which is also the simplest, by which they 

 are arranged in three tribes, according to their 

 flowers. 



TRIBE L— PAPILIONACEOUS FLOWERS. 

 The flowers of this tribe are called Papilio- 

 naceous ; because 

 Papilio is the sci- 

 entific name of a 

 genus of butter- 

 ilies, which they 

 were supposed to 

 resemble. The 

 type of this tribe 

 maybe considered 

 the flower of the 

 sweet-pea {La- 

 thjrns odoratus)^ 

 which has a small 

 green calyx, cut 

 into five deep 

 notches, but not 

 divided into regu- 

 OF lar sepals. (See a 

 and h in Jig. 13.) 

 The corolla is in five petals, the largest of 



Fig. 13. — Flower, pod, and tendril 

 the sweet-pea. 



