264 



PLANT STKUCTUKES 



fruits {drupes), as apricots, peaches (Fig. 189), plums, 

 cherries. 



141. Legumes. — This is far the greatest family {Legumi- 

 nosce) of the Archichlamydese, containing about seven thou- 

 sand species, distributed everywhere and of every habit. It 

 is the great zygomorphic group of the Archichlamydese, 

 being elaborately adapted to insect jpollination. The more 



Fig. 250. A legume plant (Lotus), showing flowering branch (1), a single flower (5) 

 showing zygomorphic corolla, the cluster of ten stamcjis (3) which with the carpel 

 is included in the licel, the solitary carpel (/,) which develops into the pod or le- 

 trume (.T), the i^ctals iu) dis^^ected apart and showing standard («), wings (6), and 

 the two lower petals ir) which fold together to form the keel, and the floral dia- 

 gram (7). — After Wossidlo. 



primitive forms of the Leguminosa3, the mimosas, acacias 

 (Fig. 2.51), etc., very much resemble true roses and the but- 

 tercups, with their hypogynous regular flowers and nu- 

 merous stamens, but the vast majority arc PnpiHn forms 

 with very irregular (zygomorphic) flowers and few stamens 



