342 Pennell: Plants of southern United States 



than twice exceeding others. Legumes 6- .;o 

 7-seeded, hirsute with spreading hairs. .Stem, 

 at least above, hirsute with spreading hairs. 



Leaflets 15-27 pairs. Stout, erect, mostly- 

 hirsute throughout. 13. C. aspera. 



Leaflets 9-18 pairs. Slender, diffuse, mostly 



hirsute only above. 13a. C. aspera /3. 



I. Chamaecrista Wrightii (A. Gray) Pennell, comb. nov. 



Cassia (Chamaecrista) Wrightii A. Gray, PI. Wright. 2: 50. Mr 



1850. 



"Hill-sides, on the Sonoita,near Deserted Rancho, Sonora; 

 Sept. [C. Wright] (1034)." Co-types seen in the herbarium of 

 Columbia University at the New York Botanical Garden and in 

 the herbarium of the Academy of Natural Sciences of Philadelphia. 



Perennial. Stem ascending, 3-4 dm. tall, finely puberulent in 

 lines with incurved to appressed hairs. Stipules lanceolate- 

 acuminate, very shortly or not ciliate, 3-4 mm. long. Petioles 3-4 

 mm. long, slightly puberulent. Petiolar gland single, below 

 proximal leaflets, conspicuously stalked, discoid, 0.15-0.2 mm. 

 wide, dark-brown. Leaflets six to eight pairs, 8-10 mm. long, 2 

 mm. wide, obliquely ellipsoid-lanceolate, rounded, very shortly 

 mucronulate, glabrous, not ciliate, obscurely nerved. Pedicel 

 one, 30-40 mm. long, sparingly puberulent in lines with incurved 

 hairs. Sepals 7 mm. long, ovate, acute. Petals 10-12 mm. long, 

 the anterior slightly exceeding the laterals. Stamens ten, unequal, 

 two longer; anthers 6-8 mm. long, gradually narrowed above, 

 yellow (?). Legumes 4 cm. long, 5 mm. wide, sparingly finely 

 appressed-puberulent. Seeds eight. 



"Hill-sides," northeastern Sonora and southern Arizona. 



Arizona. Without definite locality, /. T. Rothrock, 1874, 

 4750 ft. alt. (U). 



2. Chamaecrista aristellata Pennell, sp. nov. 



Cassia aristellata A. Gray, manuscript name on sheet here taken as 



type. 



Perennial. Stem ascending, 4 dm. tall, puberulent with in- 

 curved hairs and hirsute with interspersed longer spreading hairs. 

 Stipules lanceolate-acuminate, long-ciliate, 5 mm. long. Petioles 

 3-5 mm. long, hirsute. Petiolar gland single, slightly below 

 proximal leaflets, conspicuously slender-stalked, discoid, 1-1.5 

 mm. wide. Leaflets six to eight pairs, 10-15 mm. long, 2 mm. 



