114 WOODY PLANTS 



d. Bark thicker, becoming rough or more 

 or less scaly, gray or gray-brown. 



e. Bark on old boles thick and deeply 

 ridged and fissured ;branchlets rather 

 stout, usually thorny. Becoming large 

 trees in fertile uplands. 



Series 12. Molles. (C. mollis 



(T.and G.)Scheele,etc.) 



e. Bark on boles not deeply ridged 

 or fissured, usually becoming more 

 or less scaly. Small trees seldom 

 over 8-10 m. tall. 



f. Crown in well-developed trees 

 broadly conical or depressed 

 conical, often broader than high, 

 lower branches often slightly de- 

 pressed. Compound thorns often 

 on boles and large branches. 



g. Branchlets slender, glabrous, 

 usually flexuous and quite thorny; 

 lower branches dense and intri- 

 cate; bark of old boles scaly, smooth 

 and dark gray on branches. 



Series 6. Crus-galli (C. crus- 

 galli L. , etc. ) 

 g. Branchlets stoutish, the youngest 

 slightly pubescent, armed with long 

 slender thorns or nearly thornless. 

 Bark on old boles brownish-gray, 

 finely scaly. 



Series 7. Punctatae (C . punctata 

 Jacq. , etc. Fig. 142). 



f. Crown usually conical, rounded or 

 irregular, rarely as broad as high. 



g. Crown-irregular, open, of stout- 

 ish spreading branches; branchlets 

 flexuous and thorny. Often fruiting 

 as arborescent shrubs. 



Series 13. Pruinosae. (C. 



pruinosa (Wendl. ) 

 K. Koch, etc. ) 



