556 PROCEEDINGS OF THE AMERICAN ACADEMY, 



4. Leaves white and silvery beneath with appressed microscopic hairs. 



74:. V. hypargyrea. Shrub or tree with leafy, at first cinereous- 

 puberulent, at length glabrate and warty branches : leaves (smaller than 

 in the related species) lanceolate, attenuate at each end, serrate, conspic- 

 uously discolorous, green and microscopically puberulent above, silvery-, 

 white beneath, pinnately veined, with somewhat prominent reticulation- 

 beneath, 8 to 11 cm. long, 1.5 to 2 cm. broad : heads subglobose, numerous, 

 in compound corymbs; pedicels cinereous-puberulent, 6 to 12 mm. long; 

 pales stramineous, tipped by au erect mucro: achenes of the disk-flowers 

 2 mm. long, glabrous, narrowly and about equally winged, the wings con- 

 tinuous upon the subequal pappus-awns. — Chiapas, between Hacienda 

 Juucana and San Vicente, altitude 1,300 to 1,800 m., 12 December, 1895, 

 £. W. Nelson, no. 3510. 



e. Inner scales of the involucre about 5 mm. long : leaves coarsely dentate : 

 S. American. 



75. v.? DENTATA, IIBK. Nov. Gen. & Spec. iv. 205, Pallasia den- 

 tata, H. & B. PI. iEq. ii. 101, t. 111. — Ecuador, between Penipe and 

 Rio HamhsL, Huynboldt & Bon]jla7id ; Ecuadorian Andes, Spruce, no. 

 5792. The achenes of this species seem to be somewhat 4-aDgled, and 

 the i^appus-awns are very unequal. 



= = Leaves (at least in age) distinctly lepidote-maculate above with round white 

 dots (bases of fallen trichomes). 



a. Lower surface of the leaves sordid-pubescent : involucre campanulate : wings of 



the achene broad, equal. 



7G. Y. Donnell-Smithii, Coialter, Bot. Gaz. xx. 50, & in Donnell 

 Smith, Enum. PI. Guat. pt. 4, 88. Encelia pleistocephala, J. Donnell 

 Smith, Bot. Gaz. xiii. 189, &, Enum. PI. Guat. pt. 1, 22. — Guatemala, 

 Coban, Depart. Alta Yerapaz, altitude 1,300 m., von Tuerckheim, no. 

 1121 of Mr. J. Donnell Smith's sets; San Miguel Uspantan, Depart. 

 Quiche, altitude 1,800 m., Heyde &, Lux, no. 3385 of Mr. J. Donnell 

 Smith's sets. Type number in herb. Gray. 



b. Lower surface of the leaves essentially glabrous from the first: involucre soon 



saucer-shaped or reflexed. 



77. Y. PEUSiciFOLTA, DC. 1. c. 614; Gray, Proc. Am. Acad. v. 183 

 (persiccefolia) ', Hemsl. 1. c. 189; ? Klatt, 1. c. xxiii. 144, but not of 

 Klatt, 1. c. XX. 93, which is V. virgata, Cav. — Between Santander and 

 Yictoria, N. E. Mexico, Berlandle'>', nos. 2209, 789, San Luis Potosi, 

 Pringle, no. 3078 ; Warteuberg, Huasteca, Ervendherg, nos. 84, 91. 



