PINACE^ 



639 



Leaves of juvenile plants spirally arranged, linear, flat, long- 

 pointed ; on older trees (except on long shoots) scale-like and 

 arranged in alternating opposite pairs ; on long shoots usually 

 intermediate, but sometimes juvenile and mature types of leaves 



Fig. U^.—TSUOA YUNNANENSIS. 



a, spray ; 6, portion of pubescent upper side of si oot, and leaf ; c, glabrous under-side of shoot and 

 leaf ; d, section of leaf ; e, cone. 



and transitional forms are found. Male and female flowers borne 

 on the same plant ; the former terminate short shoots and are 

 small, solitary, and stalkless ; the female flowers axillary, shortly 

 stalked or sessile ; usually composed of 2 pairs of scales, each 

 bearing 5 or more ovules at the base. Cones ovoid or globose, 



