GREENMAN,— NEW ANGIOSPERMS FROM MEXICO. 105 
” Viguiera hypargyrea. Stem terete, substriate, upwardly ap- 
pressed-pubescent: leaves alternate, sessile or subsessile, lanceolate, 
acuminate, acute, 2.5 to 6 cm. long, 0.5 to 1.5 cm. broad, entire, rounded 
or obtuse at the base, indistinctly 3-nerved, appressed-hirsute above, 
densely soft-sericeous beneath: heads solitary, terminating the stems, 
1.5 to 2 cm. high, excluding the rays 2 to nearly 3 cm. broad at least 
in the later stages: involucre campanulate, 2-3-seriate ; bracts of involu- 
cre imbricated, lance-oblong, acute, externally sericeous-pubescent, the 
outer bracts a little shorter than the inner: ray-flowers neutral; rays 
oblong, 12 mm. long, 4 to 5 mm. broad: disk-flowers numerous: corollas 
6 mm. long, abruptly and conspicuously ampliated above the short 
pubescent tube: mature achenes about 5 mm. long, densely appressed- 
sericeous-pubescent ; pappus of two subpaleaceous awns with intermediate 
erose scales, persistent. — Mexico. State of Durango: City of Durango 
and vicinity, April- to November, 1896, Dr. Edward Palmer, no. 816 
(hb. Gr., and hb. U. S. Nat. Mus.). 
Viguiera microcephala. Stems herbaceous, 1 to 2 m. high, slender, 
erect, much-branched, striate, reddish-brown, strigose-pubescent: leaves 
alternate, at least the upper ones, petiolate, ovate, 3 to 6 cm. long, 1 to 
3.5 em. broad, acuminate, acute, somewhat sinuate-dentate with more or 
less spreading teeth, cuneate to subcordate at the base, appressed-pubes- 
cent on both surfaces; petioles 12 mm. or less in length, canous-strigose : 
heads small, 6 to 7 mm. high, radiate, including the rays 1 em. or less 
broad, disposed in few-headed cymes at the ends of the slender branch- 
lets: involucre 1-2-seriate; bracts 1 late or narrowly ovate-acuminate, 
4 to 5 mm. long, appressed-pubescent: ray-flowers 5, neutral; rays 
yellow, broadly ovate or subrotund, 3 to 4 mm. long, nearly or quite as 
broad, 4-nerved: disk-flowers 12 to 14: pappus of 2 ariste with 2 inter- 
mediate laciniate scales on either side of the achene: achenes thickish, 
sub-4-angled, 2 mm. long, at first appressed-silky-villous, later glabrous 
or nearly so.— Mexico. State of Morelos: limestone hills near Yan- 
tepec, altitude 1385 m., 7 November, 1902, 0. G. Pringle, no. 8717 
Gr.). 
In general aspect V. microcephala suggests V. tenuis, Gray, and 
V. helianthoides, HBK., but the heads are more numerous and smaller 
than in either of these species. 
Viguiera Rosei. Stems densely white-lanate-tomentose: leaves al- 
ternate, sessile, half clasping the stem by a broad auriculate base, oblong- 
lanceolate, attenuate, 1 to 2.2 dm. or more long, 1.5 to 6 cm. bro 
acute, entire to remotely denticulate, conspicuously reticulate-veined and 
