Blake — A Revision of the Genus Viguiera 155 
7.5 mm. long. Achenes (immature) sericeous. Awns 2, or with a 
third shorter one, slender, 3-3.8 mm. long; squamellae about 6, 
oblong, acuminate, lacerate-fimbriate, unequal, about 1.2 mm. 
long. — Griseb. ! Goett. Abh. xix. 183 (1874). Letghia tucumanen- 
sis H. & A. ! Hook. Journ. Bot. iii. 314 (1841). — ARGENTINA: 
in woods near Tucuman, Tweedie 1203 (TYPE: K.); Alto de las 
Salinas, Tucuman, 25 April 1872, Lorentz 309 (Ber., fragm. G.); 
1. c., Lorentz 477 (Ber.); La Cruz, Lorentz 268 (Ber.). 
107. V. HIsprpa Baker. Erect herbaceous perennial, 1 m. high, 
simple below the inflorescence, the stem strigose-pilose or -pilosul- 
ous with sometimes spreading hairs, more densely so above, some- 
times glabrate below, leafy. Leaves alternate, very narrowly 
lanceolate, acuminate at both ends, barely acute at the mucronu- 
late apex, entire, strongly revolute, 3-nerved, dull green both sides, 
above harshly and densely tuberculate-strigillose, beneath hispid 
along the midvein, elsewhere hispidulous and gland-dotted, sessile, 
5.5-8.5 em. long (the middle longest), 3.5-6 mm. wide. Heads 
about 6-8, 3.5-5 em. wide, on canescent-strigose peduncles 5-9 em. 
long; disk 7-11 mm. high, 12-18 mm. wide. Involucre 2(-3)- 
seriate, graduated, 9-12.5 mm. high, its phyllaries lanceolate or 
lanceolate-oblong, attenuate, callose-mucronate, densely tuber- 
culate-hispidulous, somewhat indurated and ribbed below, her- 
baceous above, the tips appressed or rather loose. Rays about 16, 
oblong-linear, 18 mm. long, 3-6.2 mm. wide; disk-corollas 
puberulous below and on the teeth, 4.6 mm. long (tube 1.1 mm.). 
Pales obtuse to subtruncate, mucronate, tuberculate-strigillose 
above, 7.5 mm. long. Achenes (very immature) hispidulous at 
apex. Awns stoutish, 1.2 mm. long; squamellae about 6, unequal, 
lacerate, united to above the middle, 1 mm. long. — Baker ! in 
Mart. Fl. Bras. vi. pt. 3. 220 (1884). — BRAZIL: Goyaz: Pohl 
578 (TypE: K., fragm. G.). 
108. V. ancuusarroiia (DC.) Baker. Erect herbaceous per- 
ennial, 0.8 m. high or more, the stems simple or branched above, 
bearing 1-9 heads, tuberculate-strigose and -strigillose. Leaves 
numerous, alternate, or rarely opposite below, from narrowly oblong 
or lance-oblong to linear, acute or acutish, callose-mucronate, 
Tounded or rounded-cuneate at the barely petioled base, slightly 
revolute, obscurely and distantly serrulate (teeth 4-5 pairs, very 
appressed) or subentire, equally green both sides, tuberculate- or 
