BERBERID ACE AE . 



59 



MAHONIA. Evergreen Barberry. 

 ( Family Berberidaceae ) . 



Mostly low and sparingly 

 branched shrubs : evergreen. 

 Twigs roundish, relatively stout: 

 pith comparatively large, pale, 

 continuous. Buds alternate, rath- 

 er small except for the terminal 

 one which is ovoid with half-a- 

 dozen exposed scales. Leaf-scars 

 narrow, low, half-encircling the 

 stem: bundle-traces about 9. 

 Leaves alternate, pinnately com- 

 pound, pungently toothed: sti- 

 pules and stipule-scars lacking. 

 (Odostemon; Berberis). 



Though less hardy than the true 

 barberries, the Mahonias are cul- 

 tivated to a considerable extent. 

 Sometimes their leaves are af- 

 fected by cluster-cup fungi, and 

 when this is the case they are 

 serving as alternate Lost for the 

 black-rust of wheat (Puccinia graminis'). 



1. Leaves hard and coriaceous. 2. 

 Leaves rather thin and membranaceous. 



2. Leaflets 3- or 5-nerved at base. 4. 

 Leaflets 1-nerved. 3. 



3. Leaflets small. 



Leaflets large, netted-veined beneath. 



4. With long persistent bud-scales at base. 

 Without conspicuous scales at base. 



5. 



(1). M. Fendleri. 

 M. dictyota. 

 M. nervosa. 

 M. japonica. 



5. Leaflets large: habit erect. 

 Leaflets moderate: low. 



(2). 



(3). M. Aquifolium. 

 (4). M. repens. 



