Blake — A Revision of the Genus Viguiera 97 
disk 8 mm. high, 7-8 mm. wide, convex. Involucre 2-seriate, 
slightly graduated, 3-4 mm. high, the phyllaries lanceolate, some- 
what densely and loosely pilose and gland-dotted, with indurated 
ribbed and vittate base and slightly narrower and shorter or sub- 
equal reflexed herbaceous apex. Rays about 10, oval, yellow, 
puberulous and gland-dotted on back, 4.5-6 mm. long, 2.5-3.5 mm. 
wide; disk-corollas puberulous below, with erect teeth, 3 mm. 
long, the short and very obscure tube calyptrate over the apex 
of achene. Pales stiffly short-acuminate, sparsely puberulous, 
4.5 mm. long. Achenes blackish, glabrous. Pappus none. — 
MEXICO: Ox limestone mesa, San Antonio, 790 m., 
2 Sept. 18 Ting 5731 (rypE: G.). — Named from its remark- 
able heness to some species of Zaluzania. 
45. V. tripartita (Rob. & Greenm.), comb. nov. Apparently 
herbaceous, the stem slender, striate, glabrous except for a few scat- 
tered incurved hairs, paniculately branched above. Leaves alter- 
nate or rarely opposite, lanceolate or deltoid-lanceolate in outline, 
hastately 3-lobed (the basal lobes short, deltoid, blunt, and entire, 
or nearly equalling the terminal lobe and like it bearing a few 
secondary lobes), weakly triplinerved, above dull green, lepidote- 
tuberculate-strigillose, beneath barely subcanescent with short 
rather soft incurved hairs and gland-dotted, slightly revolute, 
acuminate or obtusish, cuneate and narrowed into the petiole, 
4-6 cm. long, 1.8-5 cm. wide across the basal lobes, the upper 
leaves smaller and entire or subentire; petioles margined, 6-15 mm. 
long. Heads rather numerous, in cymose panicles of 3-5 at ends 
of branches, 2 cm. wide; ultimate pedicels 3 cm. long or less; disk 
convex, 8-10 mm. high, 8-11 mm. thick. Involucre 2-3-seriate, 
5 mm. high, the phyllaries narrowly oblong-lanceolate, with in- 
durated sparsely strigose base and shorter loose herbaceous tip. 
Rays 10-16, oval, 5-9 mm. long; disk-corollas puberulous chiefly 
below, 3 mm. long. Pales subglabrous, 4 mm. long. Achenes 
glabrous, 1.8 mm. long. Pappus none. — Gymnolomia tripartita 
Rob. & Greenm.! Am. Journ. Sci. ser. 3. 1. 154 (1895); Proc. Bost. 
Soe. Nat. Hist. xxix. 90 (1899). — MEXICOCOsxs3) Cuicatlan, 
550 m., 22 Oct. 1894, L. C. Smith 239 (coryre: G.); below Jaya- 
catlan, 1065 m., 9 Feb. 1895, L. C. Smith 386 (coryre: G.). 
46. V. stenoloba, nom. nov. Much-branched shrub, about 1 m. 
high, the stem slender, glabrous or strigillose, sometimes subcanes- 

