648 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



5. COELESTINA Cass. 



Perennial herb, suffrutescent at the base, puberulent; leaves opposite, petiolate, 

 the blades ovate or deltoid, crenate, thick, gland-dotted beneath; heads few, cam- 

 panulate, many-flowered, glomerate at the ends of the long naked branches; bracts 

 linear, appressed, striate; flowers bluish; achenes 5-angled, the pappus a short den- 

 tate crown. 

 1. Coelestina sclerophylla Woot. & Standi. Contr. U. S. Nat. Herb. 16:176. 1913. 



Type locality: In Guadalupe Canyon, Sonora. Type collected by E. C. Merton 

 (no. 2031). 



Range: Northern Sonora to southwestern New Mexico and southeastern Arizona. 



New Mexico: Guadalupe Canyon. 



6. STEVIA Cav. 



Annual or perennial herbs with opposite or alternate, mostly naiTOW, entire or 

 toothed, sessile leaves and small naiTOW heads in panicles or corymbs; heads cylindric, 

 the flowers white or purplish; achenes linear, sometimes compressed; pappus palea- 

 ceous or aristiform, or of both awns and short scales, 



KEY TO THE SPECIES. 



Annual; heads loosely paniculate 1. S. micrantha. 



Perennials; heads coiymbose. 



Upper leaves mostly alternate, linear to linear-lanceolate; 



stems rather densely leafy, pubescent or hirsute 2. S. serrata. 



All leaves opposite, lanceolate (conspicuously veined); stems 



less leafy, puberulent 3. S. plutnmerae. 



1. Stevia micrantha Lag. Gen. & Sp. Nov. 27. 1816. 

 Stevia macdla A. Gray, PI. Wright. 2: 70. 1853. 

 Type locality: Mexico. 



Range: New Mexico and Arizona to Mexico. 



New Mexico: Fort Bayard (Blumer 128). Low mounta,ing. 



2. Stevia serrata Cav. Icon. PI. 4: 33. pi. 35. 1797. 

 Type locality: "Habitat in Nova-Hispania." 

 Range : Southern New Mexico and Arizona to Mexico. 



New Mexico: Mogollon Mountains; Hanover Mountain; Sacramento Mountains. 

 Hills and mountains, in the Upper Sonoran and Transition zones. 



3. Stevia plummerae A. Gray, Proc. Amer. Acad. 17: 204. 1882. 



Type locality: Rucker Valley, Chiricahua Mountains, southern Arizona. 

 Range: Mountains of southern Arizona and southwestern New Mexico. 

 New Mexico: Mogollon Mountains; Sawyers Peak. Transition Zone. 



7. CARPOCHAETE A. Gray. 



Low shrub, 40 cm. high or less, with slender brittle branches; leaves opposite, entire, 

 sessile, spatulate-oblong, bearing fascicles of leaves in their axils; heads solitary or 

 clustered; flowers rose-colored ; involucre cylindric, of few acuminate bracts; achenes 

 puberulent, the pappus paleaceous-aristiform, 



1. Carpochaete bigelovii A. Gray, PI. Wright. 1: 89. 1852. 



Type locality: "On the boundary between Mexico and New Mexico." Type col- 

 lected by Bigelow. 



Range: Southern New Mexico and Arizona and southward. 



New Mexico: Emory Peak; Organ Mountains. Dry hills and canyons, in the 

 Upper Sonoran Zone. 



