62 TREES OP THE NORTHERN UNITED STATES 



ZZ. Leaves very broad at base, half clasping the stem and rapidly 

 narrowed to an acute tip ; hardly at all spreading from the 



threadrlike twigs ; flowers pinkish, in spike-like clusters 



6. Tamarix. 



ZZ. Leaves more elongated, quite even in width, not clasping the 

 stem 101. Taxodium. 



CLASS I. ANGIOSPfiRMJE. 



Plants with a pistil consisting of a closed ovary, which 

 contains the ovules and forms the fruit. 



ORDER I. MAGNOLlACE-ffi. (MAGNOLIA FAMILY.) 



Trees or shrubs, mainly of tropical regions, including, 

 in our section, the three following genera: 



GENUS 1. MAGNOLIA. 



Trees and tall shrubs with alternate, thick, smooth, en- 

 tire leaves with deciduous stipules which form the bud- 

 scales, and are attached entirely around the stem, leaving 

 a ridge, as in Liriodendron. 



Flowers very large (3 to 10 in. in diameter), usually 

 white, solitary. 



Fruit a large cone from which the seeds, drupe-like, 

 usually red, hang out on long threads during the autumn. 



* Blooming with or before the opening of the leaves. (A.) 



A. Flowers entirely white 9, 10. 



A. Flowers dark purple 11. 



A. Flowers mixed purple and white. A large number of 

 hybrids from China and Japan. 



* Blooming after the leaves expand. (B. ) 



B. Leaves evergreen, more than 8 in. long 1. 



B. Leaves evergreen, not 6 in. long . . .2. 



B. Leaves deciduous. (C.) 



