Blake — A Revision of the Genus Viguiera 187 
do Sul, in the Paris Herbarium, is in ripe fruit and is a good Aspilia. 
It becomes Aspriia laxa (DC.), comb. nov. 
V. leptocaulis Wats.! Proc. Am. Acad. xxvi. 140 (1891) = 
HELIANTHUS LEPTOCAULIS (Wats.) Blake, |. ¢. li. 519 (1916). 
V. longipes Coult.! Contr. U. 8S. Nat. Herb. i. 41 (1890) = 
ZEXMENIA Hispipa (HBK.) Gray, Proc. Am. Acad. xix. 10 (1883), 
as noted by Coulter, Contr. U. 8. Nat. Herb. ii. 220 (1892). 
V. macrophylla Benth.! in Oerst. Vidensk. Meddel. 1852. 92 
(1852) = OrrparA MACROPHYLLA (Benth.) B. & H. ex Hemsl. 
Biol. Centr.-Am. Bot. ii. 176 (1881). 
V. mitrocephala Greenm.! Proc. Am. Acad. xxxix. 105 (1903) = 
HapLOCALYMMA MICROCEPHALUM (Greenm.) Blake, Ll. ¢. li. 517 
(1916). 
V. microphylla (HBK.) Hieron. Bot. Jahrb. xxxvi. 490 (1905) 
(not Vasey & Rose) = HELIANTHUS MICROPHYLLUS HBK. Nov. 
Gen. iv. 220. t. 375 (1820). 
V. morelensis Greenm.! Proc. Am. Acad. xl. 40 (1904) = Ruy- 
SOLEPIS MORELENSIS (Greenm.) Blake, Contr. Gray Herb. N. 8. 
no. 52. 36 (1917). 
V. nivea nea ) Gray in Brew. & Wats. Bot. Calif. i. 354 (1876), 
excl. syn. in part.— Encelia nivea Benth. ! Bot. Voy. Sulph. 27 
(1844); Blake, Proc. Am. Acad. xlix. 375 (1913). Helianthus 
(Harpalium) tephrodes Gray! in Torr. Bot. Mex. Bound. 90 (1859). 
Viguiera tephrodes Gray, Proc. Am. Acad. xvii. 218 (1882); Syn. 
Fl. i. pt. 2. 271 (1884). Gymnolomia encelioides Gray | Proc. Am. 
Acad. xix. 4 (1883); Syn. FI. Ll. c. 269 (1884). Helianthus dealbatus 
Gray ! Syn. Fl. 1. c. 280 (1884). Helianthus niveus (Benth.) 
Brandegee, Proc. Calif. Acad. ser. 2. ii. 173 (1889). Viguiera 
sonorae Rose & Standley! Contr. U. 8. Nat. Herb. xvi. 20. t. 16 
(1912). — All the above synonymy appertains to a single species of 
Helianthus, ranging from extreme southeastern California to So- 
nora and Lower California, and characterized beneath a certain 
diversity of aspect by the ovate to oblong or oval leaves canescent 
like the stem with a strigose or strigillose usually dense and sub- 
sericeous pubescence, the very slender puberulous purple-tipped 
disk-corollas, and the pappus of several unequal paleaceous de- 
ciduous scales. The species should be known as HELIANTHUS 
NIVEus (Benth.) Brandegee. See discussion, p. 10. 
