60 PLANTS OF MASSACHUSETTS. 



R. saxatilis. Mx. Stone Raspberry. Grows a foot high, 

 and is an annual plant ; the preceding are perennial. 



R. odoratus. L. Flowering Raspberry. Distinguished by its 

 large purple flowers, and its large, 5-lobed, and serrate leaves ; 

 flowers in June, in woods and hedges. Often cultivated for its 

 beauty. Fruit is large, but sour, and is not sought for. 



R. setosus. Big. Bristly Raspberry. Grows in swamps. 



R. frondosus. Big. Probably a variety of R. villosus. 



R. Canadensis. L. A small creeping plant, in woods and 

 swamps, bearing small, dark-red, pleasant berries. 



R. obovalis. Mx. Hispid with stiff hairs, ternate leaves, 

 few-flowered ; black and sweet berries, with only a few large 

 grains ; blossoms in June ; grows in mountain swamps. 



All the species of Spiraea are woody, and belong to the shrubs, 

 where they will be described. 



ORDER 77. LEGUMINOS,E. The Pea Tribe. 



Calyx divided into 5 parts more or less deeply, often unequal, 

 and the odd segment before, with 5 petals or less, or none, in- 

 serted at the base of the calyx, papilionaceous, or regularly spread- 

 ing ; the odd petal behind ; stamens perigynous, monodelphous, 

 diadelphous, or distinct ; ovary superior ; fruit a legume or drupe ; 

 leaves alternate. This order is known generally by either its 

 papilionaceous flower, or its legume, commonly called pod, like 

 that of the pea and bean ; one of these is sometimes wanting, or 

 rather exchanged for another form of corolla, or pericarp. Some- 

 times there is a rosaceous flower and leguminous fruit. Lindley. 



This is a very important order ; it is a large one. The irrita- 

 bility of some of the family, as the sensitive plant, is wonderful 

 and inexplicable. The plants are widely spread over the earth, 

 and some yield important articles of food. Many of them are 



