OF ARTS AND SCIENCES : MAY 30, 1865. 641 



Erigeron Breweri : Pseuderigeron, pube minuta cinereum ; cauli- 

 bus e rhizoraate tenui repente adsurgentibus gracilibus usque ad apiceni 

 corymboso-1 - 5-cepbalum foliosis ; foliis oblanceolatis sen lineari- 

 spatbulatis uninerviis integerrimis ; pedunculis brevibus ; involucre fere 

 glabro disco maturo dimidio brevioribus, squamis 2 - 3-seriatis intequa- 

 libus ; ligulis elongatis uniserialibus (ut Yidetur violaceis) ; acheniis 

 parce birtellis ; pappo duplici, exteriore brevi setuloso. — Yosemite 

 A'alley, alt. 4,000 feet ; in flowei-. Near Carson City, Nevada, Dr. C 

 L. Anderson ; in fruit. Stems mostly simple from tbe base, a span to 

 a foot bigh. Leaves an inch or less in length, mostly narrow-spatulate 

 and obtuse. Heads smaller than those oi E. foliosiim, Nutt. {E. Doiig- 

 lasii, Torr. & Gray) ; the involucre more imbricated, as in E. Bigelovii, 

 but decidedly shorter. Pappus as long as the disk-corolla. Append- 

 ages of the style very short and obtuse. Achenia linear, flat, 2- 

 nerved. 



LiNOSTRis (Chrysothamnus) Howardii, Parry, in litt. : fruticosa, 

 semi-sesquipedalis ; rarais junioribus lanoso-dealbatis ; foliis linearibus 

 acutatis uninerviis glabratis (primum tenuiter arachnoideis), floralibus 

 capitula corymboso-congesta superantibus vel subaequantibus ; involu- 

 cre 5-floro cylindraceo, squamis laxiusculis lanceolatis omnibus modo 

 L. Parryi attenuato-acuminatis ; corollce pallide flavre tubo parce vil- 

 losulo ; acheniis linearibus pubescentibus. Var, a. foliis angustissime 

 linearibus elongatis ; involucre tenuissime arachnoideo glabrato. — 

 Colorado Territory, on gravelly hills near " Hot Springs " of Middle 

 Park, where it is often associated with L. Parryi, Gray, coll. C. C 

 Parry, 1863. It is more shrubby than that species, its smaller and 

 fewer-flowered heads in terminal, fastigiate, almost capitate clusters, 

 &c. A little of it was included under Hall and Harbour's No. 293. 



Var. )3. Nevadensis : foliis ph m. latioribus brevioribus (inferiori- 

 bus subspathulato-linearibus), apice cuspidate saepius incurve ; involu- 

 cri sqyamis prtcsertim ad margines magis arachnoideis subviscesis. — 

 Mount Davidson, Nevada, above Virginia City, H. G. Bloomer. Near 

 Carson City, Dr. C. L. Anderson. Ebbett's Pass, Avithin the borders 

 of California, alt. 9,000 feet. Prof. Brewer ; a dwarf form, only 5 or 

 6 inches high. 



Aplopappus Bloomeri : suffruticosus, pedalis, subresinosus, gla- 

 ber; ramis fastigiatis usque ad apicem foliosis corymbose- (vel sub- 

 paniculate-) polycephalis ; foliis subspathulato-linearibus basi attenuatis 



VOL. VI. 61 



