TREES AND SHRUBS ' 131 



ous year; calyx usually present but small, tube very short, 4 to 6 



lobed; corolla mostly wanting; stamens 2 to 4; fruit a blue black 



drupe. 



Leaves glabrous. 1. A. neomexicana. 



Leaves pubescent. 2. A. pubescens. 



2. FRAXINUSL. Ash, Fresno 



Trees of some size with opposite pinnately compound leaves 

 and inconspicuous dioecious flowers, in clusters or panicles; calyx 

 sometimes wanting or with short tube and four unequal lobes; stamens 

 2 to 3 or 4, filaments short or elongated; ovary 2-celled; styles 

 united; stigma 2-cleft; fruit a samara with flat or terete body and 

 a single wing partly surrounding the body. 



Flowers with a 4-parted corolla; leaflets small, 

 1% inches long or less. 



Flowers apetalous; leaflets 2 inches long or 

 more. 



Leaflets sessile or nearly so. 



Leaflets distinctly stalked. 



BUMELIA Sw. Buckthorn 



Low tree with rigid spreading branches, having hard wood, 

 bearing alternate simple leaves and few flowered axillary fascicles 

 of small flowers; leaves 1.5 to 3 cm. long, cuneate at the base, 

 rounded or refuse at the apex, on short petioles, dark green and 

 glabrous above and woody beneath; flowers perfect, 5-merous, calyx 

 persistent; corolla white, deciduous, lobes longer than the tube, sub- 

 orbicular. 2 mm. in diameter; stamens 5, epipetalous; staminoidia 

 ■5, petaliod ; ovary 5-ceKed; fruit drupe-like. 



A rare plant known only from the extreme southwestern 



•corner of the state. 



1. B. rigida. 



1. 



F. 



cuspidata. 



2. 



F. 



velutina. 



3. 



F. 



toumeyx. 



