Blake — A Revision of the Genus Viguiera 35 
to lance-oblong, slightly indurated at base. Paraguay and Brazil, 
with two species in Peru; species 72-82. P. 122. 
Ser. D. AurEar. Herbaceous or frutescent perennials, rarely 
annuals, of varied habit; heads mostly medium-sized; involucre 
(2-)3—5-seriate, subequal or usually graduated, the phyllaries mostly 
lanceolate, with weakly or rather strongly indurated base usually not 
sharply delimited from the herbaceous apex. Ecuador to Argentina 
and Brazil; species 83-113. P. 132. 
Subser. a. Evaurear. Herbaceous or frutescent perennials. 
Range of the series; species 83-111. P. 132. 
Subser. 8. Pusrtuar. Annuals. Peru; species 112~113. P. 159. 
Ser. E. Bracreatar. Herbaceous perennials; leaves mostly 
sessile or subsessile; involucre 3—5-seriate, strongly graduated, the 
phyllaries very strongly indurated and ribbed nearly or quite to apex, 
with short abrupt herbaceous tip or this obsolete. Brazil and Para- 
guay; species 114-127. P. 161. 
. Sect. 6. LercuHra. Herbaceous perennials; involucre 4-7-seriate, 
strongly graduated, the phyllaries usually oblong, strongly indurated, 
costate, and vittate, with abrupt herbaceous or narrow and subscarious 
terminal appendage or this obsolescent. Mexico and Lower Cali- 
fornia; species 128-131. P. 172. 
Sect. 7. TricnhopHyitua. Slender virgate perennials, the simple 
or subsimple stem very leafy; leaves linear or linear-filiform, revolute; 
involucre 3—5-seriate, the phyllaries lanceolate or linear-lanceolate, 
strongly ribbed below, herbaceous above. Paraguay and adjacent 
Brazil; species 132-136. P. 176. 
Subg. III. Yerparesia. Perennial simple or subsimple herbs; 
heads solitary at apex of stem and branches, long-peduncled; 
leaves lanceolate or oblong, rarely ovate; involucre 2—4-seriate, 
the phyllaries lanceolate, more or less indurated at base, above 
herbaceous; pappus of 2 membranaceous-paleaceous awns about 
equalled by the squamellae, which are united on each side of the 
achene into a many-nerved membranaceous-sca -scarious scale. Paraguay, 
Uruguay, and adjacent Argentina; species 137-141. P. 180. 
Species or Doustrut Arrinity. Species 142-143. P. 184. 
