GREENMAN. — NEW ANGIOSPERMS FROM MEXICO. 105 



Viguiera hypargyrea. Stem terete, substriate, upwardly ap- 

 pressed-piibesceut : 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 ; paj^pus 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 cm. 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 cm. or less 

 broad, disposed in few-headed cymes at the ends of the slender branch- 

 lets : involucre 1-2-seriate ; bracts lanceolate 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 aristae 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, C. G. Pringle, no. 8717 

 (hb. 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. broad, 

 acute, entire to remotely denticulate, conspicuously reticulate-veined and 



