TREES AND SHRUBS 101 



2. ERYTHRINA. 



A tall, thick- stemmed shrub, with scattering hooked prickles 

 on stems and leaves; leaves pinnately 3-foliolate, with large fan- 

 shaped leaflets; flowers in short terminal racemes, bright scarlet; 

 calyx campanulate, truncate, white tomentose; corolla about 4 cm. 

 long, with an elongated banner; stamens 10, monadelphous : legume 

 linear, torulose, long-stipitate; seeds large, bright scarlet. 

 A single rare species. 1. E. flabelliformis. 



3. PARRYELLA T. & G. 



Low much branched shrub with alternate, glandular-dotted, 

 many-foliolate, odd-pinnate leaves and terminal compound spikes 

 of very small, dull yellowish green flowers; calyx 5-toothed with 

 very short teeth, petals wanting; fruit a short, very glandular 

 1-seeded pod. 



1 . /\ filifolia. 



4. AMORPHA L. 



Shrubs or undershrubs with glandular-punctate, odd-pinnate 

 many-foliolate leaves; flowers in terminal, more or less elongated 

 spikes; pods small, 1-seeded; calyx teeth 5, about equal; petal 1, 

 the banner; stamens monadelphous at the base. 



Tall shrubs 6 feet high or more; pod 2-seeded. 1. A. californica. 



Undershrubs, more or less herbaceous, less than 

 3 feet high; pod 1-seeded. 



Plant green and glabrate. 2. A. microphylla. 



Plant white-canescent. 3. A. canescens. 



5. ROBINIA L. Locust 



Spiny shrubs or small trees with odd-pinnate leaves, rather 

 large pink flowers in crowded axillary short-peduncled racemes, and 

 large flat pods 3 to 5 inches long, with prominent sutures and 

 numerous seeds; leaflets V 2 to % inch long, oblong-elliptic to 

 oval. 



A single species occurring in the Upper Son- 



oran and Transition Zones. 1. R. neomexicana. 



