386 PRACTICAL BOTANY. 



nate leaf ; 3, a sinuate one ; 4, one pinnatelj lobed ; 30, a 

 lyrate leaf ; 5, one palmately cleft ; 7, one palmately di- 

 vided, petioled, and stipulate ; 6, a palmate, septinate leaf ; 

 8, a pinnate leaf with a terminal tendril ; 9, pitelier-form 

 leaf of Sarracenia ; 10, equitant leaves; 11, an odd-pinnate 

 leaf, stipulate ; 12, leaf twice ternate ; 13, another twice 

 pinnate ; 14<3^, one thrice ternate ; 14J, one thrice pinnate. 



Inflorescences : 15, a spike ; 16, a simple raceme ; 17, 

 a compound raceme; 18, a panicle ; 19, a simple umbel ; 

 20, a compound umbel; 21, arnents, a staminate, and a 

 pistillate of Birch ; 22, a corymb ; 23, a simple cyme ; 26 

 and 27, compound cymes; 21, a head; 25, spadix and 

 spathe of Calla palustris. 



Cross-section of Stems: 28, of an endogenous ; 29, of 

 an exogenous stem of two years' growth, with the cam- 

 bium-layer between two zones of wood and the bark. 



PLATE III. 



1, Eanunculus acris, flowers; la, a petal of one of its 

 flowers ; 1/;, receptacle in fruit ; all tlie natural size ; Ic, 

 vertical section of one of its numerous achenia, dividing 

 the seed, and showing the small embryo at the base of 

 abundant albumen ; IcZ, the embryo detached, both 

 figures more or less magnified. 



2, Helleborns viridis, a flower of the natural size ; ^a, 

 the receptacle with the pistils, one of the petals, and four 

 stamens preserved, about the natural size ; 25, one of the 

 follicles dehiscent ; 2c, a petal ; 2^Z, vertical section of the 

 ovary ; 2^, the summit of the style with the stigma ; all 

 magnified. 



3, Myosurus minimus, a flower of the natural size. 



4, Aquilegia Canadensis, a flower ; 4<^, a sepal ; 45, a 



