STANDLEY TEEES AND SHRUBS OF MEXICO 15S9 



Suffrutescent, 1 meter high or less, nearly glabrous; leaves slender-petioled, 

 often with fascicles in their axils, the blades deltoid, 3 to 8 cm. long and wide^ 

 bipinnatisect, the primary lobes 3 to 5 pairs; heads 2.5 to 4 cm. wide. 

 11, Coreopsis pringlei Robinson, Proc. Amer. Acad. 43: 41. 1907. 



Known only from the type locality, San Juan del Rio, Queretaro. 



Shrub, essentially glabrous; leaves petioled, the blades 2 to 4 cm. long, 1 to 

 3 cm. wide, bipinnatisect, the segments narrowly linear; heads 1 to 5, 3 cm. wide. 



77. COREOCARPUS Benth. Bot. Voy. Sulph. 28. pi. 16. 1844. 



Reference: Blake, Proc. Amer. Acad. 49: 342-345. 1913. 



Shrubs or herbs; leaves opposite, once to thrice pinnatisect; heads small, radi- 

 ate, yellow (or the rays sometimes white or purple-tinged), cymose-panicled; 

 involucre 2-seriate, subequal, the phyllaries 5 to 8, all submembranous, ovate to 

 ovate-oblong, narrowly pale-margined, lineate, sometimes with a few small 

 herbaceous bractlets at base; rays fertile; achenes obcompressed, with entire or 

 pectinate crustaceous wings; pappus none or of 2 retrorsely hispidulous awns. 



Leaves fleshy; wings of achene entire or merely crenulate 1. C. dissectus. 



Leaves not fleshy; wings of achene pectinately cut 2. C. arizonicus. 



1. Coreocarpus dissectus (Benth.) Blake, Proc. Amer. Acad. 49: 344. 1913. 

 Acoma dissecta Benth. Bot. Voy. Sulph. 29. pi. 17. 1844. 



Leptosyne dissecta A. Gray, Syn. Fl. 1^: 301. 1884. 



Leptosyne parthenioides dissecta S. Wats. Proc. Amer. Acad. 24: 56. 1889. 



Coreocarpus dissectus longilobus Blake, Proc. Amer. Acad. 49: 345. 1913. 



Southern iialf of Baja California; type from Magdalena Bay.' 



Shrubby, about 40 cm. high, trichotomously branched, essentially glabrous; 

 leaves crowded, petioled, the blades 1.5 to 7.5 cm. long, once to thrice pinnatisect, 

 the primary lobes 2 or 3 pairs, the ultimate divisions linear-filiform to linear- 

 lanceolate, 2.5 mm. wide or less; heads yellow, 1 to 1.5 cm. wide, tlie pedunculate 

 panicles nearly naked; pappus none. 



2. Coreocarpus arizonicus (A. Gray) Blake, Proc. Amer. Acad. 49: 344. 1913. 

 Leptosyne arizonica A. Gray, Proc. Amer. Acad. 17: 218. 1882. 



Coreopsis arizonica O. Hoffm. in Engl. & Prantl, Pflanzenfam. 4 5; 243. /. 118, 



S. 1890. 

 Sonora and Chihuahua. Arizona; type from Fort Lowell. 

 Suffruticulose, 30 to 60 cm. high, essentially glabrous, branched at base; leaves 

 petioled, the blades 5 to 8 cm. long, pinnatisect into 3 to 5 linear lobes 1 to 3 mm. 

 wide, the lower pair sometimes again pinnatisect; heads yellow, or the rays white; 

 achenes sometimes with a pappus of retrorsely spinulose awns. 

 2a. Coreocarpus arizonicus pubescens (Robins. & Fern.) Blake, Proc. Amer. 

 Acad. 49: 344. 1913. 

 Leptosyne arizonica pubescens Robins. & Fern. Proc. Amer. Acad. 30: 118. 



1894. 

 Sonora; type from Granados. 

 Whole plant rather densely spreading-pilosulous. 

 2b. Coreocarpus arizonicus filiformis (Greenm.) Blake, Proc. Amer. Acad, 

 49: 344. 1913. 

 Leptosyne arizonica filiformis Greenm. Proc. Amer. Acad. 40: 44. 1904. 

 Known only from the type locality, Sierra de Choix, Sinaloa. 

 Leaf lobes linear-filiform, less than 1 mm. wide, the lower ones 4 to 6 cm. long. 



1 See Blake, Contr. Gray Herb. n. ser. 52: 50. 1917. 



