Madia.] COMPOSITE, 



23 



positp, involucro imbricato. — DoelJingei'ia umbellata. NeeSy AsL p. 178. — Aster umbel- 

 latus. Ait Hort Kew. ed, 1. v, S. p, 199. — Chrysopsis amygdalina. Nutt. Gen, Am. v. 2, 

 p. 153. 



Hab. Canada. Dr. Holmes* Mr. Vleghom. 



13. D, amygdalinus ; foliis oblongis, caule angustato glabro apice corymboso-composito, 

 involucro laxo. — Doellingeria amygdalina. NeeSy Ast p, 179. — Diplostephium amygdal, 

 Cass. — Aster amygdalinus. Lam. — Mich. Am, v. 2, p. 109. Pursh^ FL Am. v. 2. p. 549. — 

 Chrysopsis humilis. Nutt. {excL syn. Ast. cornifolii, MuhL et Ast. infirmi, Mich., Nees.) 

 Aster humilis. Wilid. — Pursh, Jbl. Am. v. 2. p. 548, Elliott^ Carol, v. 2. p. 367. 



Hab. Canada. Mrs. Percival. Newfoundland. Miss Brenton. Mr. Cormach. — I am by no means satis- 

 fied of the permanency of the distinguishing characters of this and the preceding species. 



61. BOLTONIA. rHerit. 



Radius ?, uniserialis. Discus $. Pappus brevis, radii pluri- disci bi-setosus. Cor. disci 

 regularis. Achenium erostre. — Herbae Boreali- AmericancBy erectm; foliis alternisy integris; 

 ramis divaricatis florigeris monocephalis apicegue aphylUs; capituHs parviusculisy radio 

 ccBruko ; rachide conica ; involucris imhricatis. Less. 



1. B. glastifoUa; foliis inferioribus serratis, floribus brevlter pedunculatis, seminibus ob- 

 cordatis conspicue alatife pubescentibus aristis pappi duabus ipsorum longitudirie. Pursh^ 

 UHerit Sert. Angl. p. 27, Mich. Am. v. 2. p. 132. Pursh^ FL Am. v. 2. p. 561. Sims, 

 Bot. Mag. ^.2381. 



Hab. Canada. Goldie, — My plant does not exactly accord with either of the two species described by 

 Pursh. The seed or achenium is oval and glabrous, as in B. asteroides; but it has the unequal pappus and the 

 two paleae longer than the rest, and the broad wings of B, glastifoUa. Elliott has a third species, whose 

 achenium is scarcely winged, and the pappus is as in our plant May they not all be varieties of the same 

 Species? The figures and descriptions of Dr. Sims in the Botanical Magazine, B. glastifoUa (t. 2381), and 

 S. asteroides (t. 2554), do not at all help to clear the difficulties. There the two species have the most striking 

 resemblance. 



62. BRACHYRIS, Nutt. 



Radius uniserialis ? . Discus $ . Pappus paleaceus uniserialis, paleis linearibus, 5-8. 

 Cor, disci regularis. Achenium obconicum erostre. — Herba perennis. Bore ali-Americanaj 

 erecta; foliis anguste linearibus^ integris, punctatis; capitulis solitariis temis, ramosfastigiatos, 

 caulis terminalihus, radio et disco b-floris; involucris cyli^idraceis ; rachide nuda. Less. 



1, B, Euihami(B. Nutt. Gen. Am. v. 2.p. 163. — Solidago Sarothrae. Pursh, FL Am. v. 2. 

 p. 540. 



Hab. High grounds of the Saskatcbawan (2>r«?wmow</) and Red Rivers. Douglas. 



r 



63. MADIA. Molina. 



Radius fcemineus, uniserialis. Discus hermaphrodltus. Corolla radii lingulata, llngula 

 triloba tubum superante. Achenium erostre, tetragono-compressum, quadricostatum, disco 



