CARYA 



63 



fruit, present in winter, either on the tree, or mostly scattered 

 on the ground, may be classed as a kind of dry drupe, or try ma . 

 Hicoria Raf. 



a. Bud-scales valvate, in pairs 



b. Buds covered with yellow-brown 

 hairs; kernel sweet 



b. Buds sulfur-yellow, scurfy; 

 kernel bitter 



a. Bud- scales imbricate, usually 

 more than 2 exposed 



b. Terminal bud large, usually 

 over 10 mm. long, mostly hairy; 

 fruit with a thick husk 



1. C. illinoensis 



2. C. cordiformis 



c. Outer bud-scales persistent, 

 the bud shaggy in appearance 



d. Twigs dark reddish-brown; 

 fruit 3-6 cm. long 



d. Twigs orange-brown or buff- 

 colored; fruit 4-6. 5 cm. long 



c. Outer bud -scales falling early, 

 the bud neat in appearance 



b. Terminal bud small, usually less 

 than 10 mm. long; mostly glabrous 

 or scaly; fruit with a thin husk 



c. Terminal bud essentially glabrous 

 (hairy if the outer bud -scales have 

 fallen) 



d. Fruit obovoid, the liusk usually 

 splitting only part way down 

 (or tardily splitting) 



3. C. ovata 



4. C. laciniosa 



5. C. tomentosa 



6. C. glabra 



d. Fruit usually ellipsoid or sub- 

 globose, the husk splitting 

 promptly to the base 7. C. ovalis 



