36 NORTH AMERICAN FLORA [Volume 3 



6. Bahiapedata A. Gray, PI. Wright. 1: 123. 1852. 



Schkuhria pedata A. Gray, Proc. Am. Acad. 9: 199. 1874. 



A puberulent annual; stem erect, puberulent, 3-5 dm. high; leaves puberulent and 

 glandular-granuliferous, alternate, pedately 3-5-dissected; petioles 1-4 cm. long; primary 

 segments 1-5 cm. long, obovate in outline, again cleft into obovate oblanceolate or oblong 

 toothed lobes; heads in foliaceous cymes; peduncles 2-5 cm. long; involucre hemispheric. 

 5 mm. high, 6-7 mm. broad; bracts oblanceolate, glandular-puberulent and slightly glandular- 

 hispid, acute; ligules cuneate-oblanceolate, 5 mm. long, 2.5 mm. wide; tube of disk-corollas 2 

 mm. long, glandular; throat campanulate, fully 1 mm. long; achenes narrowly obpyramidal, 

 3.5 mm. long, angled, striate, hirsute; squamellae obovate, about 1.5 mm. long, obtuse, with 

 a narrow rib not reaching the apex. 



Type locality: "Between western Texas and El Paso" [now western Texas]. 

 Distribution: Western Texas to Arizona. 



7. Bahia biternata A. Gray, PI. Wright. 2: 95. 1853. 



Schkuhria biternata A. Gray, Proc. Am. Acad. 9: 199. 1874. 



A cinereous-puberulent annual; stem erect, slender, about 3 dm. high; leaves alternate, 



short-petioled, cinereous-puberulent, biternately dissected into linear, obtuse, entire or 2-3- 



lobed segments; peduncles slender, 4-5 cm. long; involucre hemispheric, about 5 mm. high; 



bracts about 12, obovate, obtuse, puberulent; ligules 8-10, obovate-cuneate, bright-yellow, 



6-7 mm. long; tube of disk-corollas less than 2 mm. long, glandular; throat campanulate; 



achenes 3 mm. long, narrowly obpyramidal, 4-angled, hirsute and strongly striate; squamellae 



of the pappus 12-14, obovate, the midrib often excurrent beyond the apex, especially in the 



inner achenes. 



Type locality: Hills near Ojo de Gavilan, New Mexico. 

 Distribution: Western Texas to Arizona and Sonora. 



8. Bahia aristata Rydberg, sp. nov 



A decumbent annual, branched at the base; stem about 2 dm. high, hirsutulous-canescenr. ; 

 leaves opposite or the uppermost alternate, bipinnatifid into linear divisions, 2-4 cm. long, 

 canescent-hirsutulous ; peduncles 3-5 cm. long; involucre turbinate, 6-7 mm. high, about 



1 cm. broad; bracts obovate, rounded at the apex, hirsutulous; ligules about 10, oblong, 



2 mm. long; disk-corollas yellow, many, 3 mm. long; tube shorter than the throat; achenes 



3 mm. long, sparingly hispidulous; pappus-squamellae lanceolate, with an excurrent midrib, 

 together with the awn nearly equaling the corolla. 



Type collected on alkaline plains, Hacienda de Angostura, San Luis Potosi, 1891, Pr ingle 5127 

 (Gray Herb.). 



Distribution: San Luis Potosi. 



9. Bahia glandulosa Greenman, Proc. Am. Acad. 39: 116. 1903. 



A herbaceous perennial with a tap-root; stem erect, 5-7 dm. high, glandular-pubescent, 

 branching; leaves alternate, petioled, three or four times dissected, 2-12 cm. long; divisions 

 linear to oblong, obtuse, densely glandular; heads in terminal corymbose cymes; peduncles 

 2-4 cm. long; involucre 5 mm. high, about 1 cm. broad; bracts 10-14, oblanceolate or 

 oblong, obtuse, in one series; ligules 15-20, pale- yellow or whitish, 5-6 mm. long; disk-corollas 

 numerous; tube 2 mm. long, glandular, longer than the campanulate throat; achenes 3 mm. 

 long, angled, puberulent, striate; squamellae 10-12, obovate-spatulate, rounded to aristulate 

 at the apex. 



Type locality: Vicinity of the City of Durango. 

 Distribution: Durango and Chihuahua. 



10. Bahia absinthifolia Benth. PI. Hartw. 18. 1839. 



A perennial, suffruticose at the base; stem 2-4 dm. high, finely white-tomentose, branched; 

 leaves opposite, subsessile, white-tomentose, 2-5 cm. long, pinnately dissected into 3-5 nar- 



