200 



The Plant World. 



obovate to lanceolate, entire, sinuate-dentate, or dentate lobed, 

 with acute or rounded bristle-tipped lobes. The apex is usually 

 slightly 3-lobed, the base gradually narrowed and wedge-shaped 

 or rounded. The unfolding leaves are scurfy-pubescent and 

 not reddish. At maturity the leaves are from 10 cm. to 15 cm 



Fig. 2. Leaves'and flowers of Quercus leana. 



1. Leaves (natural size). 

 2. A flowering twig with staminate and pistillate flowers and immature leaves 



3. Twig showing winter-buds. 



4. A staminate flower (enlarged) 



5. A pistillate flower ( enlarged) 

 6. An acorn (natural size) 



long, and from 5 cm. to 7 cm. wide. It is of thick and firm 

 texture, lustrous and dark green above, rusty-brown and 

 puberulous below, with slender petiole, mid-rib, and primary 

 veins. The petiole is from 2 1-2 cm. to 4 cm. long. The fruit 

 is sub-sessile or pedunculate, and usually solitary. The nut is 

 short, full and rounded at both ends, and is covered nearly to 

 the middle by the turbinate, hemispherical cup. The scales 

 are ovate, loosely imbricated, pubescent, light red-brown 

 The shell of the fruit is often striated as in the black oak. 



There are four excellent reasons for considering this oak a 

 hybrid, and these are: 



