344 PROCEKDIXGS OF THE AMERICAN' ACADEMY. 



species are slightly stouter and more pubescent than an\' other 

 specimens examined but show no essential differences. — Lower 

 California: Lagoon Head, Mar. 1889, Palmer 795; Natividad 

 Island, 10 April 1897, Brandcgce; Cape San Lucas, &c., Aug. 1859- 

 Jan. 1860, Xanius 62 (type of C. hetcrocarpus) ; San Jose del Cabo, 8 

 Mar. 1892, Brandegec 339; La Paz, 20 Jan.-5 Feb. 1890, Pahncr 19; 

 Santa x\.gueda, 4-6 Mar. 1890, Palmer 248; mountain sides, Los 

 Angeles Bay, Dec. 1887, Palmer 660; Lower California, without 

 locality, Br. Street. 



* * Suffrutescent perennials. 

 -*- Achene-wing pectinately dissected. 



2. C. arizonicus (Gray) Blake, n. comb. ]Much branched from a 

 woody base, nearly or quite glabrous; leaves 7-10.5 cm. long, pin- 

 nately di\ided into 3-5 linear lobes 1-3 mm. wide; heads rather nu- 

 merous in panicled few-headed cymes; involucral scales 5-6 mm. long; 

 rays 5-6, 7 mm. long; achenes with the wing split into flattened cu- 

 neate lobes, the inner achenes narrower; retrorsely spinulose awns 

 sometimes present. — Lcptosync (Coreocarpus) arizonica Gray, Proc. 

 Am. Acad. xvii. 218 (1882). Coreopsis arizoniea O. Hoffm. in Engler 

 & Prantl, Nat. Pfl. iv. Ab. 5. 243 (1890).— Arizona: along streams, 

 Ft. Lowell, Aug. 1880, Lcmmon (cotype); by streams of the Santa 

 Catalina Mts., 760-1060 m., April 1881, Prbujle (cotype); Santa 

 Catalina Mts., May 1881, Lemmon 211; mountains, Lowell, 8 May 

 1884, W. F. Parish 112. Sonora: Touibabi, 18 Nov. 1890, F. E. 

 Lloyd 407; Alamos, 1890, Palmer 384 (approaching the next form); 

 Chihuahua: southwestern part, 1885, Palmer 294. 



2/3. C. ARIZONICUS (Gray) Blake var. pubescens (Rol). & Fern.) 

 Blake, n. comb. Whole plant pubescent with short rather soft hairs. — - 

 Leptosyne arizonica var. pubescens Rob. & Fern. Proc. Am. Acad. xxx. 

 118 (1894).— Sonora: Granados, 905 m., 15 Nov. 1890, Hartman 

 222; Huchuera9hi, 1220 m., 5 Dec. 1890, Hartman 296; Agnos 

 Blanco, 9 Dec. 1890, Lloijd 406. 



27. C. ARIZONICUS (Gray) Blake var. filiformis (Greenm.) Blake, 

 n. comb. Leaf-lobes linear-filiform, less than 1 mm. wide, the lower 

 4-6 cm. long. — Leptosyne arizonica var. filiformis Greenm. Proc. Am. 

 Acad. xl. 44 (19(M).— Sinaloa: Sierra de Choix, 80 km. NE. of 

 Choix, 15 Oct. 1898, Goldman 258 (cotype in Gray Herb.). 



-(- -1- Achene-wing thick, often rugose, entire or barely crenulate; leaves 

 fleshy, bipinnatifid. 



3. C. dissectus (Benth.) Blake, n. comb. Sufi^rutescent, trichoto- 

 mously branched, glabrous; leaves mostly crowded near the base of 



