Blake — A Revision of the Genus Viguiera 33 
chartaceous apex; pappus of 2 awns and several free or united nearly 
always much shorter scarious (not submembranous) squamellae, or 
sometimes wanting. United States to Argentina and Brazil; species 
13-136. P. 59. 
Sect. 1. Hyparayrea. Stout simple or subsimple perennials, 
with one to few large heads, and large or very large sessile lanceolate 
or ovate leaves sericeous or tomentose beneath; involucre 2—3-seriate, 
slightly graduated, the phyllaries oblong or oblong-ovate, slightly 
indurated below; pappus always present. Mexico; species 13- 
oS . GO. 
Sect. 2. Cutoracra. Perennial herbs or shrubs; involucre 2-5- 
seriate, graduated or rarely subequal, the phyllaries with ovate to 
oblong usually strongly indurated base and narrower abruptly her- 
baceous apex (the latter obscure in some species), or sometimes sub- 
herbaceous throughout; pappus present or absent. United States 
to Guatemala; species 16-49. P. 62. 
Ser. A. Macuuatar. Shrubs or rarely herbs, with panicled 
heads and usually scabrous ovate leaves; involucre 2-3-seriate, the 
phyllaries with oblong or oblong indurated costate and 
vittate pale-margined base and usually short and triangular herbaceous 
apex; pappus always present, the awns usually paleaceous. 
Mexico; species 16-22. P. 62. ; 
Ser. B. GrammaTociossak. Herbs or shrubs, with mostly ovate 
leaves and few to many medium to large heads; involucre 2-5- 
seriate, the phyllaries graduated or subequal, obtuse to acute, at 
base obscurely indurated or merely costate and subherbaceous, the 
herbaceous or subherbaceous apex usually not distinctly different in 
texture from the base; pappus present or sometimes none. Texas 
: ae 23-33. P. 68. 
o Guatemala; species erbs or shrubs, with usually ovate entire 
ovate or ovate-oblong base and abruptly narrowed linear or linear- 
lanceolate herbaceous apex; pappus rarely absent. Nevada to 
- gnecies 34-42. P. 79. 
ee ee Shrubs or rarely herbs (?), with 
deeply pinnate-lobed leaves; involucre 2-3-seriate, the phyllaries 
lanceolate or lance-subulate, with strongly indurated costate and 
vittate base and abrupt narrow herbaceous apex; corollas ampli- 
