Blake — A Revision of the Genus Viguiera 71 
or rather sparsely hispid-pilose especially on margin and midnerve 
or subsericeous, sometimes also finely tuberculate-hispidulous and 
glandular. Rays 10-12, oval, 11-19 mm. long, 4.5-10 mm. wide, 
the veins often prominent in drying; disk-corollas puberulous be- 
low and on the teeth, 5.5-6 mm. long (tube 0.7-1 mm.). Pales 
obtuse to acuminate, mucronate, tuberculate-hispidulous toward 
tip and along keel, 8-10 mm. long. Achenes appressed-silky, 
4.8 mm. long. Awns slender, 4 mm. long; squamellae about 8, 
linear-oblong, 1.2 mm. long. — DC.! Prod. v. 580 (1836). Encelia 
hypargyrea Rob. & Greenm.! Am. Journ. Sci. ser. 3. 1. 155 (1895). 
(Not V. hypargyrea Greenm. (1903).) V. argyrophylla Blake, 
Proc. Am. Acad. xlix. 374 (1913). — MEXICO: Micnoacan: 
Tlapujahua, F. W. Keerl (type of V. grammatoglossa: Prod.); 
Pursia: Santa Lucia, near San Luis Tultitlanapa, July 1908, 
Purpus 2528 (B. M., G., U. S.); Tehuacan, Sept. 1911, Purpus 
5415 (G.); Oaxaca: limestone ledges, La Hoya Canyon, 1525 m., 
2 Nov. 1894, Pringle 6142 (TyPE cou. of E. hypargyrea: B. M., 
G., K.); Santa Catarina Canyon, 1000 m., 4 July 1897, Pringle & 
Conzatti 405 (G.). 
26. V. bombycina, nom. nov. Shrubby, the stem in youth 
rather densely subcanescent-pilose with long ascending tuberculate- 
based subsericeous hairs and more or less granular, in age becoming 
subglabrate and covered with a grayish bark. Leaves opposite 
or the upper alternate, ovate or ovate-lanceolate, acute or sub- 
acuminate, at base cuneate, entire, strongly triplinerved, above 
dull green or subcanescent with incurved tuberculate-based rather 
long hairs, beneath densely softly silky-pilose with appressed hairs, 
2.5-5.3 em. long, 1-2.2 em. wide; petioles silky-pilose, nearly 
naked, 5-10 mm. long. Heads 1-3 at apex of stem and branches, 
4.5 cm. wide, on mostly naked peduncles 6.5 cm. long or less; disk 
in fruit 12-13 mm. high, 20-23 mm. thick. Involucre 3-seriate, 
scarcely graduated, 7-8 mm. high, the phyllaries narrowly oblong, 
obtusish, silky-pilose, below subindurated and ribbed, the loose 
or spreading apex slightly more herbaceous. Rays about 16, 
13-15 mm. long, 3-5 mm. wide; disk-corollas puberulous below 
and on teeth, 6.8 mm. long (tube 1.2 mm., strongly swollen at base). 
Pales mucronulate, hispidulous on kod 7 mm. long. Achenes 
glabrous, 3 mm. long. Pappus none.— Gymnolomia sericea 
Klatt! Leopoldina xxiii. 90 (1887); Rob. & Greenm. Proce. Bost. 
