Blake — A Revision of the Genus Viguiera 165 
long, 3-4.5 mm. wide; disk-corollas yellow, puberulous below, 
5 mm. long (tube 1 mm.). Pales glabrous, mucronulate, sub- 
tridenticulate, 8 mm. long. Achenes (very immature) sparsely 
appressed-villous, 3.5 mm. long. Awns 2, ciliolate, 2.2 mm. long; 
squamellae about 6, free, lanceolate, lacerate, 1 mm. long. — 
PARAGUAY: plateau and declivities of the Sierra de Amambay, 
Feb. 1907-08, Rojas (distr. Hassler) 10757 (tyre couy.: B. M., 
Ber., photog. and fragm. G.). — T. 2. Fia. 30. 
118. V. hypoleuca, sp. nov. Herbacea infra inflorescentiam 
simplex, caule folioso hispido-piloso apice ca. 7-capitato, foliis 
oblongis vel lanceolatis integris acutis 5-nerviis supra viridibus 
lucidis subtus canescenter piloso-tomentosis, involucri 3-4- 
seriati 6-7 mm. alti phyllariis oblongis vel oblongo-ovatis appressis 
valde induratis hispidulo-ciliolatis apice breviter herbaceis saepe 
mucronulatis. 
Herbaceous, erect, 1 m. high, simple below the inflorescence, the 
stem terete, striatulate, very leafy, whitish-brown, hispid-pilose, 
above hispidulous and more or less glandular, bearing about 7 
heads. Leaves alternate, oblong to oblong-lanceolate or lanceolate, 
acute, entire, rounded at base, 5-nerved, above green and lucid, 
harshly strigillose at length subglabrous, beneath veiny, canes- 
cently pilose-tomentose, glandular, the lower 6-7 em. long, 2.2- 
2.5 em. wide, gradually smaller above. Bracts of inflorescence 
ovate-oblong, 1.4-3 cm. long; peduncles 0.4-10.7 em. long, naked 
or 1-bracteate; heads 1.7 em. wide; disk 8.5-10 mm. high, 9-14 
mm. thick. Involucre 3—4-seriate, 6-7 mm. high, graduated, the 
phyllaries oblong, subacute, centripetally becoming broader and 
blunter, the innermost oblong-ovate, roundish at apex, all strongly 
indurated, subcoriaceous, costate, hispidulous-ciliolate, otherwise 
glabrous, with a short triangular herbaceous apex, often mucronu- 
late. Rays about 8, yellow, oblong, 3.54 mm. long, 1.3 mm. wide; 
disk-corollas yellow, glabrous or with a few hairs, 4.5 mm. long 
(tube 0.8 mm. long). Pales truncate, hispidulous, 3-4-denticulate, 
5-5.5 mm. long. Achenes black, hispidulous above, subquadrangu- 
lar, 4 mm. long. Awns 2, spinulose-ciliolate, subtrigonous, 
Strongly unequal, about 2.5 mm. long; squamellae lacerate- 
fimbriate, united at base, 0.7 mm. long. — BRAZIL: Marto 
Grosso: sandy rather grassy open place, Buriti, near Santa Anna 
da Chapada, 3 June 1894, Malme 1658 (rvpx: B. M., photog. and 
