16 



\ 



COiMPOSIT^. [Erifferon, 



jequantibiis.— Aster graminifolius. Herb. Banks. MS S,—Ptfrsh , FL Am. v. 2. p. 545. Rich, 

 in Frank. \st Jonm. ed. 2. App.p. 32. {Me Herb. 7iostr.) 



Hab. Hudson's Bay. Herb. Banks. Dr. Richardson. Slave Lake, Dr. Richardson.— T\i\% is indeed very 

 closely allied to G. neinoralis and G. linifolia; but there are, besides the costa, two lateral ramified nerves 

 in the leaves, whose maro;ins and costa too are hairy, and the pappus is almost white. 



38, TOWNSENDIA. Nov. Gen. 



Capitulum heteroganium. FloscuH radii ligulati foeminei; disci hermaphroditij regulares. 

 Involucrifoiiolaplurisermlia imbricata. Pappus uniserialis; radiihvevis^ paleaceo-subulatus, 

 insequalis; rfzsa pilosus, pilis elongatis scabriusculis. — Herba Americ(E boreal is humilis acau- 

 lis. Radix fusiformis, lignosa^ longe descendens; superiie scepe divisa^ reliquiis foliorum 

 vettistorum obtecta. Folia omnino radicalia, numerosa, erecto-patentia^ linearia, subspathulafa, 

 integerrima, ntrinque adpresso-sericea, basi dilatata, et utrinque ciliata. Flos soUtarius.foliis 

 immersus et obtectus, ratione plantar magnus. Involucrum ovatum , foliolis sericeis, lineari- 

 subidatis, erectis, imhricatis. Flosculi radii ligulati^ erecti, pallide roseiy marginibus involuti, 

 apice dentibus tribus conniventihtis. Sugma bijldum, purpureum, glabrum. Ovarium oblong urn ^ 

 compressO'triquetrum, pubescens. Pappus brevis sed vaMe ina^quoUs, iniiserialis, e pilis sen 

 paleis subvlatis, basi membranaceis. Flosculi disci tidmlosi^ lutei. Pappus pilosus^ pilis 

 scabriusculis hngitudine corollcB. Ovarium sericeum. Receptaculum alveolate -punctatum^ 



nudum. 



1. T. sericea. (Tab. CXIX), Aster? exscapus. Rich, in Frankl. 1st. Journ. ed. 2. 

 App. p. 32. ' 



Hab. Carlton House upon the Saskatchawan. Dr. Richardson. Rare, upon the dry banks of the Sas- 

 katchawan and among the Rocky Mountains. Drummond.'—Th.h highly interesting little plant, no less on 

 account of its habit than its pappus, deserves to be separated from Aster, of which, indeed, it'was by Dr. 

 Richardson, considered a doubtful species. « The bud Ls formed in the autumn." and what Dr. Richardson 

 further observed in the living plant, I find to be characteristic of all the specimens in this Collection, that « the 

 florets of the ray are mostly involute, rarely expanded, and always narrow, nearly of the same colour with the 

 pappus and inconspicuous; the flowers, indeed, never fully expanding." 1 have named the Genus in compli- 

 ment to David Townsend, Esq. of West Chester, Pennsylvania, who having imbibed the most ardent love of 

 Botany from his friend and instructor Dr. Darlington of the same city, has devoted his leisure hours to the 

 science with eminent success. The plant now under consideration is peculiarly worthy of bearing his name, 

 because he has studied and ably discriminated the numerous Pennsylvanian species of the allied Genus Aster. 



Tab. CXIX.— i^i^. 1, Flowers ;^^. 2, Floret of the ray; fig. 3, Portion of the pappus from the ray; fig. 4, 

 Floret of the disk ; fig. 5, Portion of a hair from the pappus of the disk; fig. 6, Stigma from the disk;' 

 fig. 7, 7, Scales of the involucre; fig. 8 ; — all more or less magnified. 



59. ERIGERON. Z. 



Flores ? pluriseriales in ambitu ligulati numerosi angusti; reliqui 5. Involucri foliola 

 imbricata angusta. Pappus conformis, uniserialis. Cor. § regularis. Ackenium erostre. 



Herbae Europ(B, Asiatics vel Americanw, erectcBy ramosce vel simplices, magis ininusve hir- 

 sutcB;foliis alternis, inferioribus oblongo-obovatis, dentatis; capitulis albis vel pnrpureis soli- 

 tariis vel paniculatis. Nees. 



