'Mi I'IKLl) MamAI. 



a. AmluTs introrso; leaves ii<>t truncal^. 



Magnolia. (12). 

 a. Antlu-rs oxtrorse: leaves truncate. 



Liriodendron. (i:i). 

 1<|. (Jvulary compound, plurilocular. 11. 

 1<'. Ovulary unilocular, •2-ovuled; leaves usually with disk- 

 like or tooth-like glands on the petiole or at the 

 base of the blade. Rosaceae. ( Amygdalatae). 

 a. Young ovulary and drupe glabrous. Prunus. (27). 

 a. Young ovulary and drupe velvety-pubescent. 



Amygdalus. (28). 



11. I^'lower cluster subtended by a large, membranous 



bract; calyx deciduous; leaves alternate. 2-ranked; 

 sai) mucilaginous. Tiliaceae. 



a. Tilia. (20). 

 il. Mowers not subtended by a membranous bract; leaves 

 alternate with deciduous stipules; sepals per- 

 sistent. Rosaceae. (Malatae). 

 See 24 below. 



12. Ovulary only 1, carpels 1 to many, united. 1"). 



12. Carpels 2 or more, distinct, or somewhat united at 

 the base. 13. 



10. Leaves compound. 11. 



1-S. Shrubs or trees with alternate simple leaves. Hama- 



MELIDACEAE. 



a. Ovules 1 in each cavity; leaves ine(|uilateral. not 



star-shaped. Hamamelis. (4-')). 

 a. Ovules several in each cavity, fruit globular, 



spiny. Liquidambar. (4(1). 



11. Leaves punctuate with pellucid dots, alternate. 



Rl'TACEAE. 



a. Zanthoxylum. (17). 

 14. Leaves large, pinnate, alternate, not punctuate but with 

 disc-like glands under the teeth or lobes. Sima- 



RURACEAE. 



a. Ailanthus. (19). 

 1'». ("arpel 1, ovulary with 1 parietal placenta; leaves 

 alternate. usua11\- witli ^tipule<. \isually cnmpounrl 



P' A RACE A K. 



