544 PROCEEDINGS OF THE AMERICAN ACADEMY 



cauline leaves obtuse and tapering into a short and margined petiole. 

 Pass El Robles in Salinas Valley, south of San Luis Obispo, with a 

 naked head (said to have the disk sometimes 4 inches in diameter, but 

 in the specimens much smaller), and the cauline leaves more petioled. 

 I have a radical leaf (about 1^ feet long and 4i inches wide) and a 

 head of this, collected by Dr. Andrews, probably near San Francisco. 

 TJ''. helianthoides, Nutt. (of which, however, I have not present access 

 to any specimen), W. rohusta, Nutt., and W. angustifoUa, Nutt., belong 

 probably to one species. The following, with the aristiform pappus of 

 the above, has the woolliness and aspect of W. helenioides, but much 

 smaller heads. 



"Wtethia JtOLLis : arachnoideo-lanata, ostate subdenudata; caule 

 1 -3-cephalo; foliis oblongis ovalibus ovatisque omnibus petiolatis in- 

 tegerrimis ; involucri squamis ovato-lanceolatis cum ligulis elongatis 

 10-12 ; acheniis linearibus e pappo breviter coroniformi longius biaris- 

 tato vel in radio triaristato. — Mono Lake and summit of Sonora Pass 

 in the Sierra Nevada. Also near Carson City, Nevada, Dr. C. L. 

 Anderson ; and in great patches on Mount Davidson at Virginia City, 

 H. G. Bloomer. The Nevada specimens much more densely clothed 

 with a coat of floccose white wool than those of Prof. Brewer : this may 

 readily be rubbed off, and partly wears away from the old leaves. 

 Radical leaves a foot or less in length, besides the stout petiole: cauline 

 leaves 4 to 6 inches long. Scales of the involucre about an inch long, 

 the outer and larger ones a little surpassing the disk, very woolly. 

 Ligules an inch and a half long. Achenia about half an inch long, the 

 subulate awns 3 or 2 lines long. — jMr. Nuttall regretted, as all must 

 do, that this genus could not retain De Candolle's name of Alar^onia. 



Helianthus Bolanderi : Annul ; caule hirsute bipedali et ultra 

 ramoso ; foliis omnibus altemis ovato-lanceolatis sen ovato-rhomboideis 

 crebre saepius grosseque serratis e basi attenuata trinerviis longe petio- 

 latis; involucri squamis foliaceis lineari-Janceolatis sensim attenuatis 

 acutissimis patentibus vix imbricatis hirsutis discum superantibus ligu- 

 las 10-12 suba^quantibus ; acheniis sericeis ; pappi paleis 2 aristas- 

 formibus. — At the Geysers, Lake County, near Clear Lake, H. N. 

 Bolander. The root is pretty clearly annual ; and the species (with 

 leaves somewhat like those of // petiolaris, but much more serrate, 

 &c.) is very different from any otlier we have. Heads small, the 

 brown-purple disk less than an inch in diameter, the involucre resem- 

 bling that of If. decapetalns or N. tracheliifoUus. 



