BULLETIN 



OF THE 



TORREY BOTANICAL CLUB 



Vol. IX,1 New York, September, 1882, [No. 9. 



New Californian Ccmpositae. 



By Edward Lee Greene. 



^' Pentachaeta alsinoides. — Hirsute pubescent, 2-4 inches high, 

 diffusely branched ; heads numerous, on fiUform peduncles 3-6 lines 

 long, 3-5-flo\vered ; scales of the narrowly turbinate or nearly cylin- 

 drical involucre 5 or 6 ; rays wanting; disk-corollas yellow, filiform, 



not 



sparingly pubescent; 



b 



V 



akene in length, or occasionally, in one or more of the akenes, re- 

 duced, or nearly obsolete. — P. exilis. Gray, var. discoidea^ Gray. Bot. 

 Cal. i. 305, as to the '' very depauperate state about San Francisco " 

 only. 



The best specimens of this exceedingly well-marked species were 

 collected by the writer on the Berkeley Hills, May 13, 1882. 



The plant differs widely from even the rayless forms of P. exilisy 

 in the first place by its diffusely branched and altogether sand-wort- 

 like habit, continuing to branch and flower for weeks after the earl- 

 iest involucres have matured and shed their akenes. 



The akenes themselves are very characteristic, being fusiform and 

 nearly naked, while those of P, exilis are obovate, or at most, obo- 

 vate-oblong, and are always densely white-villous. 



Hemizonta (Hartmannia) Lobbii. — N'ear Zr.Zr^<?r;;/a/?///',Greene, 

 but much more slender, the flowering branchlets filiform, and the 

 heads consisting of only 3 ray- and 3 disk-flowers ; akenes of the ray 

 narrowly obovate-oblong, those of the disk crowned with a pappus of 



8-10 linear, chaffy scales. 



What is probably the only specimen extant of this uncommonly 

 well-marked species, appears to have been lying for probably thirty 

 years in the herbarium of the late H. G. Bloomer. The sheet Xo 

 which it is fastened bears this note, in the handwriting of Mr. Bloom- 

 er : '' Calycadenial No- 323 in Lobb's catalogue is omitted. The 

 plant was probably obtained near Monterey. H. G. B." 



Though exactly like //. Heermanni in the character of foliage, 

 pubescence, glandulosity, etc., it is very distinct by its extremely few 

 flowered heads, and especially by the pappus of its disk-akenes. It 

 forms 4n interesting third member of what may be called the virgata 



group of the genus. 

 V. Hemizonia (Euhemizonia) Clevelandi. — Afoot or two high, y/ 



simple or branching', very hirsute below, and more or^ less glandular 



above ; leaves linear, entire ; heads small or middle-sized, racemose, 



sessile or short-peduncled ; scales of the involucre with short tips, 



their margins not at all enfolded over the inner face of the obovate, 



rather sharply triangular akenes ; rays 6-10, white, deeply 3-lobed ; 



outer series of chaff united into a scarcely toothed cup. 



The plant was collected many years since in Lake County, by 



