1495 



ASTER* cyaneus. 

 Glaucous Aster, 



SYNGENESIA POLYGAMIA SUPERFLUA. 



Nat. ord. Composite Juss. {Introduction to the natural system of 

 Botany, p. 197.) 



§. Corymbiferae Juss. Asterese Cassini. 

 ASTER.— Supra, vol. d.fol. 183. 



Sect. B. 8. Herbacei; foliorum venae primaries divergentes, v. 



evanescentes ; involucra campanulata, squamis exterioribus sensim mi- 



noribus appressis v. erectis. 

 A. cyaneus ; purpurascenti-glaucus glaber, foliis inferioribus ovato- v. 



oblongo-lanceolatis basi petiolatim angustatis : superioribus subam- 



plexicaulibus oblojigis v. ovatis acutis : supremis minoribus, squamis 



acutis basi albidis, pappo flosculis disci eequali, ovariis glabris. 

 A. Novi Belgii /3. glaucus. Ait. Kevj. ed. 1. vol. 3. p. 206. 

 A. cyaneus. Hoffm. phytogr. bldtt. 1. t. B. f. 1. Necs monog. ast. herb. 



p. 23. 

 A. glaucus. Nees I. c. p. 23. 

 A. bupleuroides. Hort. monsp. 

 A. mutabilis. Hort. berol. 



Omni parte herbaced glaucus, purpureo magis minusve tinctus. Caulis 

 erectus, in cultd 2-3-pedalis, in spontanea scepe multb demissior. Folia 

 radicalia nunc subsessilia, basi angustata, serrata, nunc longe petiolata, 

 quibusdam subcordato-oblonga serrata, aliis ovato-lanceolata integerrima ; 

 caulina cum Jig ur a turn margine pariter variantia, scepiiis acuta, aliquandb 

 obtusa, semper subamplexicaulia ; suprema nunc sensim nunc abrupte minora, 

 caulinis conformia. Capitula nunc apice ramorum solitaria, nunc geminata, 

 nunc in ramos racemosa, rarihs corymbosa ; involucra campanulata, squamis 

 erectis, imbricatis, acutis, apice herbaceis, basi albidis, margine submem- 

 branaceo, exterioribus multb minoribus. Flosculi radii magis minusve intense 

 cyaneiy involucro longiores, disci lutei submutabiles. 



This appears to be an extremely common North American 

 plant, for it forms a part of almost every collection from 

 the midland districts of the United States. It has been a 



See fol. 1487. 



