118 Bulletin of the University of Texas 



globose heads, solitary or clustered in the axils of the leaves. 

 Fruit a linear flattened pod pointed at both ends. 



In Kandy and rocky soils Florida to Texas -and Mexico. 



CASSIACEAE Link. Senna Family. 



Trees or shrubs with alternate, simple or compound leaves; 

 some species armed with prickles. Flowers mostly perfect, 

 in clusters, regular or irregular. Fruit a 2-valved or inde- 

 hiscent pod. 



1. Leaves simple, rhomboidal, heart shaped at basj 1. Cercis. 



2. Leaves pinnate. 



a. Leaves once pinnate. 



(1) The axis of the pinnae broad and 

 winged, borne in fasicles, leaflets 



numerous , 2. Parkinsonia. 



(2) The axis of the pinnae not broad and 



winged, leaflets few 3. Cercidium. 



3. Leaves bipinnate or once pinnate on the same 



tree 4. Gleditsia. 



CERCIS L. The Red Buds. 



Small unarmed tree with alternate, simple, deciduous leaves 

 which are round in outline and heart-shaped at base. Flowers 

 red or purplish in axillary clusters on branches of preceding 

 year, appearing before the leaves. Fruit a flattened, leathery 

 pod. 



Leaves pointed at the apex, pods stalked 1. C. Canadensis. 



Leaves rounded and blunt at the apex. 



Pod not stalked 2. C. reniformis. 



1. Cercis Canadensis R. Red Bud. Judas Tree. A small 

 tree with thin fissured bark, smooth branches, and slender, 

 light brown twigs. Leaves ovate-orbicular to reniform, pointed 

 at the apex, rounded at base, bright green and smooth above, 

 paler and hairy along the veins below. Flowers before the 

 leaves in clusters of 4 to 8, purplish, pedicels somewhat elon- 

 gated. Fruit a linear oblong pod which tapers at both ends, 

 persistent until winter. 



Ontario to Florida, west to Minnesota, Arkansas, and east- 

 ern Texas. Principally along streams and in rich bottom 



