106 PROCEEDINGS OF THE AMERICAN ACADEMY. 



appressed-hirsute-pubescent above, rather densely soft-tomentose beneath : 

 heads large, about 2 cm. high, 4 to 5 cm. broad, terminating the stem 

 and branches on 2 to 6 cm. long slightly thickened upwardly densely 

 white-lanate peduncles : involucre campanulate ; bracts of the involucre 

 2— 3-seriate, lance-attenuate, 3 cm. or less in length, about 5 cm. iu 

 breadth, more or less foliaceous and recurved at the tip, sericeous- 

 pubescent: ray -flowers about 16, neutral; rays 12 to 15 mm. long, 5 mm. 

 broad : disk-flowers numerous : pappus of 1 or 2 unequal subpaleaceous 

 deciduous awns and shorter deeply lacerated intermediate persistent 

 scales : corollas apparently roseate or somewhat pink in color : mature 

 achenes about 6 mm. long, densely appressed-pubescent. — Mexico. 

 State of Zacatecas : near Plateado on the road from Colatlan, 31 August, 

 1897, Dr. J. N. Rose, no. 2710 (hb. Gr., and lib. U. S. Nat. Mus.). 



Notwithstanding the superficial resembhmce tiiis plant bears to the 

 genus Tlthoala, o\\ account of the robust habit and large heads, the real 

 affinity seems to be with the genus Viguiera, and is closely related to 

 V. decurrens, Gray, and V. excelsa, Benth. & Hook. The writer takes 

 pleasure in dedicating the species to its collector, Dr. J. N. Rose of 

 the U. S. National Museum, Washington, D. C . 



Altamirania, n. gen. of CompositcB ( Verhesinece). Heads heteroga- 

 mous, radiate. Involucre campanulate; bracts 2-3-seriate. Receptacle 

 convex or conical ; pales of the receptacle couduplicate, keeled. Ray- 

 flowers uniseriate, fertile ; achenes triangular. Corollas of the disk- 

 flowers regular ; tube short, ampliated above into an elongated-cylindrical 

 5-toothed limb. Anthers minutely dentate at the base, appendaged at 

 the apex. Style-branches obtuse. Achenes of the disk-flowers laterally 

 compressed-4-angled. Pappus of 2 to 3 paleaceous awns, with 1 to 3 

 lacerated scales between, persistent. Erect suffruticose (?) plants with 

 opposite leaves and terminal cymose inflorescence. 



A. pachyphylla. An erect suffruticose (?) plant, glabrous through- 

 out, or slightly puberulent on the peduncles : stem striate, purplish : 

 leaves lanceolate or somewhat oblanceolate, 5 to 12 cm. long, 1.5 to 

 3.5 cm. broail, acute or acuminate-acute, dentate, narrowed below to a 

 subpetiolate base, smooth on both surfaces, dark- or somewhat olive- 

 green above, paler beneath : heads 1 cm. or less high, including the rays 

 3 to 4 cm. in diameter, disposed in terminal compound corymbose cymes: 

 involucral scales linear, obtusish, slightly thickened and more or less 

 spreading: ray-flowers 8 to 10; rays narrowly oblong about 1.5 cm. 

 long, 3 mm. broad : disk-flowers numerous ; the paleaceous awns about 

 one-half as long as the corolla ; achenes tapering toward the base, cilio- 



