OF ARTS AND SCIENCES: MAT 30, 1865. 543 



close congener of C. (^Ammodla, Nutt.) Oregana ; but is at once dis- 

 tinguished by the above cliaracters, and by its laxer inflorescence. The 

 involucre is less imbricated and much shorter, scarcely exceeding the 

 achcnia, which are broad and flat. There is an evident setulose outer 

 pappus, like that of Chrysopsis villosa, &c. A new examination of the 

 Oregon species shows the same, only scantier. So I venture to regard 

 Nuttall's Ammodia as a discoid section of Chrysopsis. 



Chrysopsis Bolaxderi: § Acliyrcea, C. piloscB affinis, vilIo«ior; 

 radice perenni ; foliis superioribus acutioribus, summis conformibus 

 capitula sessilia involucrantibus vel fulcrantibus paullo superantibus- 

 que ; corollis disci extus parce arachnoideis ; pappo exteriori e paleolis 

 linearibus subulatisque achenio angusto cano-sericeo vix dimidio bre- 

 vioribus. — Hills of Oakland, near San Francisco, abundant, H. N. 

 Bolander. From the general character, and the ibliose-bracted sessile 

 heads, this would seem to be Nuttall's C. sessilijlora (from Santa Bar- 

 bara), of which I find I have no specimen, though I must some time 

 have examined it. But the present plant shows an outer pappus as 

 conspicuous as that of G. pilosa itself, although of longer and narrower 

 scales. A few scattered, long, arachnoid hairs are borne on the upper 

 part of the disk-corollas. 



SoLiDAGO GuiRADONis : VirgatcB, glaberrima; caule gracili stricto; 

 foliis anguste linearibus elongatis integerrimis, imis lanceolatis in petio- 

 lura marginatum longe attenuatis ; panicula angustissima oligocephala ; 

 capitulis parvis ; involucri squamis subulatis, costa crassa ; ligulis 8-9 

 flores disci 10-12 baud superantibus ; acheniis puberulis. — Along a 

 brook at the base of San Carlos, coll. Guirado. Stem 2^ or 3 feet 

 high, from a ligneous rhizoma. Lowest leaves 6 inches long, less than 

 half an inch wide ; the principal cauline leaves 3 inches long and only 

 2 or 3 lines wide, above gradually reduced to linear-subulate bi'acts, 

 venulose. Heads 2J- lines long, erect, sometimes in almost a simple 

 raceme. A very distinct species, named for the collector, a very in- 

 telligent young native Californian assistant in the surveying party, 

 Guirado. 



Wyethia (ALARgONiA) GLABRA : W. helemoidei proxima, sed 

 glabra, pi. m. viscosa ; foliis caulinis in petiolum brevem attenuatis ; 

 pappo calyciformi e paleis 5-8 ovatis vel triangulatis nunc basi nunc 

 ad medium u-que coalitis. — Marin County : specimen with the large 

 head foliose-involucrate, as in many specimens of W. helenioides ; the 



