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 an 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 
Juncana and San Vicente, altitude 1,300 to 1,800 m., 12 December, 1899, 
EE. W. Nelson, no. 8510. : 
e. Inner scales of the involucre about 5mm. long: leaves coarsely dentate: 
S. Ameri 
75. V.? penrata, HBK. Nov. Gen. & Spec. iv. 205. Pallasia den- 
tata, H. & B. Pl. AXq. ii. 101, t. 111.— Ecuador, between Penipe and 
Rio Bamba, Humboldt & Bonpland ; Ecuadorian Andes, Spruce, n0- 
5792. The achenes of this species seem to be somewhat 4-angled, and 
the pappus-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. 
76. V. Donnett-Smitruti, Coulter, Bot. Gaz. xx. 50, & in Donnell 
Smith, Enum. Pl. Guat. pt. 4,88. Encelia pleistocephala, J. Donnell 
“Smith, Bot. Gaz. xiii. 189, & Enum. Pl. Guat. pt. 1, 22. — Guatemala, 
Coban, Depart. Alta Verapaz, altitude 1,300 m., von Tuerckheim, 00- 
1121 of Mr. J. Donnell Smith’s sets; San Miguel Uspantan, Depart. 
Quiché, altitude 1,800 m., Heyde & Luz, no. $385 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. __ 
TeV, PERSICIFOLIA, DC. 1. c. 614; Gray, Proc. Am. Acad. v- 183 
(persicafolia); Hemsl. 1. c. 189; ? Klatt, 1. c xxiii. 144, but not of 
Klatt, 1. c. xx. 93, which is V. virgata, Cav. — Between Santander an 
Victoria, N. E. Mexico, Berlandier, nos. 2209, 789, San Luis Potos 
_ Pringle, no. 3078; Wartenberg, Huasteca, Ervendberg, nos. 84, 91. 
