OF ARTS AND SCIENCES : MAT 13, 1873. 657 



— Utah, probably in the southern part of the Territory, Captain F. M. 

 Bishop. This remarkable species, with head fully as large as that of 

 E. Californica, on a perfectly naked scape, departs a little from the 

 generic character in having minute and short somewhat membrana- 

 ceously connected squamelke between the awns, of which mere vestiges 

 persist on the mature achenium. 



Encelia (GeRjEa) argophylla. This is the name which must 

 be borne by a close congener of the preceding, the Tithonia argophylla 

 of Eaton in S. Watson, Bot. King, p. 423, if the most scanty mate- 

 rials on which it was founded belong to one plant, as is likely. The 

 foliage described consists of tufts of radical leaves, which are ex- 

 ceedingly silvery-white with a very dense and close-pressed, short, soft 

 silky down, all rhombic-spatulate with long-tapering base and abruptly 

 acuminate or acute apex. The separate and fragmentary head, so far 

 as the means of comparison exist, might be identical with that of the 

 preceding species at maturity. Its achenia are four lines long ; the 

 very numerous and fine intermediate squamellce are, however, appar- 

 ently more setulose. " Dr. Palmer describes the stem as erect, two or 

 three feet high, leafy, with cauline leaves similar to the radical ones." 

 He informs us that it was found at St. George, in Southern Utah. 



Encelia (Gek^ea) eriocephala, Simsia canescens Gray, Bot. 

 Mex. Bound, p. 89, the specific name changed on account of the old 

 Encelia canescens. It is remarkable for the lona; and white villous 

 hairs which densely fringe the lax and linear-lanceolate herbaceous 

 scales of the involucre; and the awns of the pappus are naked. 



Encelia (Ger^a) frutescens, Simsia frutescens Gray, 1. c, to 

 the character of which it should be added that the rays are more 

 commonly present, 6 to 12 in number, and 3 - 4-lobed. 



Encelia (Gerjea) scaposa, Simsia scaposa Gray, PL Wright. 

 2, p. 88. Still known only from Wright's New Mexican collection. 

 The disk-corollas are yellow; the thin chaff of the receptacle acutish. 



— Nearly related to this is 



Encelia (Ger^a) microcephala. Herbacea, puberula; caulibus 

 e radice perenni erectis strictis pedalibus apice corymboso-oligocepha- 

 lis ; foliis scabro-hispidulis integerrimis subcoriaceis, radicalibus cum 

 caulinis infimis oppositis spathulato-lanceolatis obtusis triplinerviis in 

 petiolum attenuatis, cseteris minoribus alternis lineari-lanceolatis (sub- 

 pollicaribus), superioribus sensim decrescentibus ; involucri cam- 

 panulas disci brevioris squamis oblongis gradatim imbricatis subcori- 



VOL. VIII. 83 



