WOOTON AND STANDLEY — FLORA OF NEW MEXICO. 335 



6. Cassia baahinioid.es A. Gray, Bost. Journ. Nat. Hist. 6: 180. 1850. 



Type locality: On the Rio Grande, Texas. 



Range: Western Texas to Arizona. 



New Mexico: Kingston; Mangas Springs; Dog Spring; mesa west of Organ Moun- 

 tiiins; west of Roswell. Mesas, in the Lower Sonoran Zone. 



6. Cassia covesii A. Gray, Proc. Amer. Acad. 7: 399. 1868. 

 Type locality: "Camp Grant, and south of Prescott, Arizona.'' 

 Range: Southwestern New Mexico to Arizona and southward. 

 New Mexico: Telegraph Mountains (TFboton). Dry soil. 



4. CHAMAECRISTA Moench. Partridge pea. 



Herbaceous annuals or perennials with abruptly pinnate leaves and bright yellow 

 flowers in few-flowered extra-axillary clusters; rachis of the leaf bearing one or two 

 glands near the base; calyx lobes 5, acuminate; petals 5, unequal, the lowest little or 

 much the largest; stamens 10, all perfect, the anthers opening by terminal jwrea; 

 pods narrowly oblong-Unear, flattened, the valves elastic; seeds compressed, ovoid or 

 quadrate. 



KEY to the species. 



Perennial; peduncles 30 to 40 mm. long 1. C. wrightii. 



Annuals; peduncles 20 mm. long or less. 



Flowers small, the petals about 5 mm. long, one much longer 



than the other four 2. C. leptadema. 



Flowers larger, the petals 12 mm. long or more, all of about the 

 same size. 



Leaflets 16 to 28; pod not beaked or obscurely so 3. C.fasciculata. 



Leaflets 10 or 12; pod with a beak 2 or 3 mm. long 4. C. rostrata. 



1. Chamaecrista wrightii (A. Gray) Woot. & Standi. 

 Cassia ivrightii A. Gray, PI. Wright. 2: 50. 1853. 



Type locality: "Hillsides, on the Sonoita, near Deserted Rancho, Sonora." 



Range: New Mexico, Arizona, and Sonora. 



New Mexico: On the Mmbres {Mexican Boundary Survey 297). 



2. Chamaecrista leptadenia (Greenm.) Cockerell, Muhlenbergia 4: 68. 1908. 

 Cassia leptadenia Greenm. Proc. Amer. Acad. 41: 238. 1905. 



Type locality: Texas. 



Range: Western Texas to Arizona. 



New Mexico : Organ Mountains. Dry hillsides, in the Upper Sonoran Zone. 



3. Chamaecrista fasciculata(Michx.) Greene; Small, Fl. Southeast. U. S. 587. 1903. 

 Cassia fasciculata Michx. Fl. Bor. Amer. 1: 262. 1803. 



Type locality: "Hab. in Pennsylvania et Virginia." 

 Range: Maine to South Dakota, Florida, Colorado, and New Mexico. 

 New Mexico: Organ Mountains ( Wooton). Dry fields and hillsides, in the Upper 

 Sonoran Zone. 



4. Chamaecrista rostrata Woot. & Standi. Contr. U. S. Nat. Herb. 16: 135. 1913. 

 Type locality: Sandy soil at Logan, New Mexico. Type collected by G. L. Fisher 



(no. 93). 



Range: Known only from type locality, on sandy plains of the Upper Sonoran 

 Zone. 



