Leaves Alternate. 101 



GUIDE TO THE OAKS. 



Section I. — Leaves, not sharp-pointed* or bristle-tipped. 

 Fruit, annual. 



A. Leaves, deeply lobed, with the ends of the lobes 



and the hollows rounded. Pp. 102-106. (The 

 White Oaks.) 



B. Leaves, wavy-toothed.* Pp. 108- 11 2. (The Chest- 



nut Oaks.) 



Section II. — Leaves, sharp-pointed or bristle-tipped. 

 Fruit, biennial. 



A. Leaves, abruptly widening above and slightly lobed, 

 lobes rounded f and bristle-tipped. P. 114. (Black 

 Jack.) 



B. Leaves, deeply lobed ; the ends of the lobes sharp 



and bristle-tipped. 



(1) Mature leaves downy beneath. P. 116. (Spanish 

 Oak.) 



(2) Mature leaves smooth on both sides, or nearly 

 so. Acorn-cup with coarse scales and more or 

 less top-shaped, and covering one third or nearly 

 one half of the nut. Pp. 1 18-122. (Scarlet Oak 

 and Black Oak.) 



(3) Mature leaves smooth on both sides, or nearly 

 so. Acorn-cup with fine scales, shallow, saucer- 

 shape, much shorter than the nut. Pp. 122-124. 

 (Red Oak and Pin Oak.) 



C. Leaves, entire, very narrow, pointed, and bristle- 



tipped. Pp. 126-128. (The Willow Oaks.) 



* Excepting yellow Chestnut Oak, which is usually sharp-toothed. 

 f Excepting sometimes Black Jack. 



