Al Ai.NOLIACEAE. 



63 



Magnolia. 

 (Family Magnoliaceae). 



Trees or shrubs: deciduous or 

 evergreen. Twigs somewhat aro- 

 matic, moderate or stout, or less 

 commonly slender, subterete: 

 pith rather large, continuous, 

 round, sometimes with firmer 

 diaphragms. Buds solitary, ovoid 

 or fusiform, sessile, the terminal 

 sometimes enlarged or the lateral 

 greatly reduced, with a single 

 scale keeled and with a scar on 

 its back. Leaf-scars alternate, 

 commonly 2-ranked, moderate or 

 small, round to U-shaped, low: 

 bundle-traces numerous and scat- 

 tered: stipule-scars linear, en- 

 circling the twig. Leaves, when 

 persistent, simple and entire. 



Winter-character references to 

 Liriodendron and Magnolia under 

 Schizandra. 



firm plates of pith evident. 2. 

 Deciduous: pith diaphragms often sparse. 3. 



2. Leaves thick: twigs rusty-pubescent. (1) M. grandiflora. 

 Leaves thin or falling: twigs silvery. (2). M. glauca. 



3. Leaf-scars clustered on annual swellings. 4. 

 Leaf-scars not clustered: lateral buds evident. 6. 



4. Glabrous and glaucous: twigs slender. (3). M. Fraseri. 

 Puberulent, or twigs stout. 5. 



5. Glabrous except near the end-bud. 



(Umbrella magnolia). M. tripetala. 

 Downy: twigs very stout. 



(Great-leaved magnolia). M. macrophylla. 



1. Essentially evergreen 



