BOTANY. 89 
SIMSIA (GERÆA) CANESCENS, Gray, Pl. Fendl. р. 85. Sand hills near Fort Yuma, California, 
January ; Schott. A striking species, with a remarkably white-woolly involucre and large 
showy rays. A less hairy form with laciniate leaves was gathered on the Gila by Dr. Parry. 
SIMSIA (GERÆA, sed eradiata) FRUTESCENS, (вр. nov.): hispidulo-scaberrima, ramosissima; foliis 
parvis (1-4-роШсваг аа) oblongis seu ellipticis utrinque obtusis integerrimis, petiolo ийг ч 
capitulis longiuseule pedunculatis ramulos terminantibus discoideis ; involucri squamis exterio- 
ribus lanceolatis ovatisve acuminatis subsquarrosis albo-hirtis, interioribus obovatis obtusis ; 
acheniis margine cum aristis brevibus (interdum fere obsoletis) longissime villosissimis. Agua 
Caliente, on the Gila; Colonel Emory, November 28, 1846. Sierra Prieta, near Fort Yuma, 
E. California, December, 1854; Schott. Also gathered (with rather large heads) by Colonel 
Frémont, in 1849, somewhere in the interior country of California. Fragments of this plant, 
too poor to characterize, have been known for some years in a small collection made by Colonel 
Emory in his earliest exploration of the Gila country. There are now good materials at hand. 
It appears that the plant must be associated with another from the same region, upon which I 
formerly proposed to found a genus under the name of (елеп, but afterwards (Pl. Fendl. l. c.) 
concluded to append to Simsia. "The present species is remarkably distinguished, however, by 
its woody or suffruticose, slender stems, (apparently belonging to a low and much branched 
bushy plant,) and by the total absence of the rays, which are remarkably large in its congener. 
Very likely the genus Germa (placed between Simsia and Encelia) should be re-established for 
these two species; but for the present they may be appended to Simsia, although new dis- 
coveries may more probably approximate them to Encelia. The heads vary from a quarter to 
half an inch in diameter. The awns of the pappus are often as long as the much elongated 
and dense fringe of soft white hairs which surround the otherwise glabrous achenium, but always 
covered with similar long hairs. Sometimes they are almost obsolete, or reduced to a slender 
base for the insertion of the tuft of hairs. 
SIMsIA (@ЕВЛА) scaposa, Gray, РІ. Wright. l. c. Stony hills between the Mimbres and the 
Rio Grande, New Mexico; Wright. 
ÑIMSIA EXARISTATA, Gray, Pl. Wright. 2, p. 81. On the San Pedroq, &c., Sonora ; gathered 
by all the collectors. 
SIMSIA (BARRATTIA) cALvA, Gray, Pl. Lindh. 2, р. 228. Throughout southern and western 
Texas ; “common on dry and stony hill-sides of the chalk and oolite ;’’ Schott. 
VIGUIERA CORDIFOLIA, Gray, Pl. Wright. 1, p. 107, £ 2, p. 89. Common іп New Mexico and 
northern Sonora and Chihuahua ; gathered by all the collectors. 
VIGUIERA taxa, DC.; Gray, 1. e. Cobre, &е., New Mexico; Wright. 
VIGUIERA LACINIATA, (sp. nov.): frutescens, hispidulo-scabra; foliis plerisque alternis subcon- 
fertis petiolatis hastato-lanceolatis incisis seu laciniato-pinnatifidis subtus grosse reticulatis 
rigidis, summis parvis bracteiformibus ; capitulis geminis ternisve breviter pedunculatis ; invo- 
lucri 2-3-serialis squamis ovato-oblongis vix appendiculatis; receptaculo planiusculo; ligulis 
integerrimis ; acheniis subciliatis aristis paleseformibus 2 et squamellis latis apice eroso-dentatis 
6—8 coronatis.— Rancho Gamacha, east of San Diego, California, September, 1855; Schott. А 
remarkable species, apparently a low and more or less shrubby plant, with slender branches. 
Leaves about 14 inch long, including the petiole, thin but rigid, very scabrous, the coarse 
teeth, or lobes, ovate or triangular, blunt. Heads nearly half an inch long ; rays nearly of the . 
same length. Squamelle of the pappus thick. Pale of the receptacle acutish. 
а. 
