OF ARTS AND SCIENCES : MAT 30, 1865. 641 



Erigeron Breaveri : Pseuderigeron, pube minuta cinereum ; cauli- 

 bus e rhizomate tenui repente adsurgentibus gracilibus usque ad apicem 

 corj'mboso-l - 5-cephaluin foliosis ; foliis oblanceolatis sen lineari- 

 spathulatis uninerviis integerrimis ; pedunculis brevibus ; involucre fere 

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

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

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

 Valley, alt. 4,000 feet ; in flower. Near Carson City, Nevada, Dr. C 

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

 a foot high. 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. 



LiNOSYRis (Chrtsothamnus) Howardii, Parry, in litt. : fruticosa, 

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

 acutatis uninerviis glabratis (primum tenuiter arachnoideis), floralibus 

 capitula corymboso-congesta superantibus vel subeequantibus ; involu- 

 cro 5-floro cylindraceo, squamis laxiusculis lanceolatis omnibus modo 

 L. Parryi attenuato-acuminatis ; corollas pallide flavoe tubo parce vil- 

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

 linearibus elongatis ; involucro 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. j8. Nevadensis : foliis pi. m. latioribus brevioribus (inferiori- 

 bus subspathulato-linearibus), apice cuspidate saspius incurvo ; involu- 

 cri squamis prsesertim ad margines magis arachnoideis subviscosis. — 

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

 Carson City, Dr. C. L. Anderson. Ebbett's Pass, within 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- 

 paniculato-) polycephalis ; foliis subspathulato-linearibus basi attenuatis 



VOL. VI. 61 



