CAESALPINIACEAE 179 



11. Prunus Padus L. Locally escaped in eastern N. Am. Native of 

 Eu. — Pennsylvania : AlIvEGHEny, Pittsburg. 



12. Prunus serotina Ehrh. Wild Black Cherry. (Man. p. 526; 

 I. F. /. 2026.) In woods or open places, Ont. to Fla., S. Dak. and Tex. 

 — Pennsylvania : Pike ; Monroe ; Bucks ; Delaware ; Chester ; 

 Lancaster ; Centre ; Cambria ; Franklin ; Allegheny. 



2. AMYGDALUS L. 

 1. Amygdalus Persica L. Peach. (Man. p. 526; I. F./. 202J.) Es- 

 caped from cult., N. Y. toGa. — Pennsylvatiia : Delaware ; Lancaster, 

 and generally throughout the State. 



Family 14. CAESALPINIACEAE Kl. & Garcke. Senna Family. 



Corolla apparently papilionaceous, but with the unpaired petal embraced by 



the wings : leaves with i-foliolate blades. i. Cercis. 



Corolla [more ^or less irregular, often nearly regular : leaves with pinnately 

 compound blades. 

 Leaves with simply pinnate blades. 2. Cassia. 



Leaves with 2-pinnate blades. 



Flower with a short receptacle : stamens surpassing the petals. 



3. Gleditsi.a.. 

 Flower with a long receptacle : stamens shorter than the petals. 



4. Gymnocladus. 



1. CERCIS L. 



1. Cercis Canadensis L. Red-bud. American Judas-Tree. (Man. 

 p. 529; I. F. /. 2033.) In rich soil, Ont. to Minn., N. J., Fla. and 

 Tex. — Pennsylvania : Delaware ; Chester ; Lancaster ; Dauphin ; 

 Franklin ; Huntingdon ; Blair ; Allegheny. 



2. CASSIA L. 



Corolla very irregular : calyx-lobes acuminate. 



Corolla less than i cm. wide : one petal much larger than the other four. 



I. C. nictilans. 

 Corolla over i cm. wide : petals moderately unequal. 2. C. Chaniaecfista. 

 Corolla essentially regular, the five petals nearly equal : calyx-lobes obtuse. 

 Petiolar gland between the lower pair of leaflets : leaflets 4-6, the blades 



obovate. 3. C. Tora. 



Petiolar gland at the base of the rachis : leaflets 12-20, the blades elliptic or 

 oblong. 4. C. Marylandica. 



1. Cassia nictltans L. Wild Sensitive- Pl-a^nt. (Man. p. 529 ; I. 

 F.y. 2034. ) In dry soil. Me. to Ga., west to Ind., Kans. and Tex. — Penn- 

 sylvania : Northampton ; Bucks ; Delaware ; Chester ; Lancaster; 

 York ; Franklin ; Luzerne ; Huntingdon ; Allegheny. 



2. Cassia Chamaecrista L. Large-flowered Sensitive Pea. 

 (Man. p. 529 ; I. F./. ^ojj.) In dry soil, range of the preceding species, 

 but extending further west. — Pennsylvania : Bucks ; Delaware ; 

 Chester ; Monroe; Lancaster ; York ; Perry; Franklin ; Alle- 

 gheny. 



