164 SYNGENESIA. SUPERFLIfA. 



Flowers large and yellow. Calix hemispherical, closely 

 imbricated, the scales terminating- in foliaceous revolute 

 points, abuudantly secreting a resinous fluid which often 

 by its tenacity prevents the expansion of many of the ra- 

 dial florets. 'Rays linear-lanceolate. Seed obovate, com- 

 pressed, smooth. Pappus consisting of about 4 decidu- 

 ous chafiy setae. Receptacle flat, naked, cellularly punc- 

 tured. Hab. On rocky calcareous hills near the lead- 

 mines of the Meremek, Missisippi, a few miles from St. 

 Louis. — Mr. J. Bradbury: also abundant on the broken 

 banks of the Missouri. In these situations it is a biennial, 

 cultivated in London it becomes suffruticose, even when 

 exposed to the climate. May it not be a variety of D. glu- 

 tinosuy deteriorated in the term of its duration by the seve- 

 rity of the climates into which it has gradually been ex- 

 tended? Although arranged in a diiTercnt order of the 

 Linnjcun system it appears by no means indistinctly al- 

 lied to the genus Carthamus, and tiic order of Cixahoce. 



PilAL^. 



5C,:^. ARNICA. L. 



Calix Iicmispherical, leaflets equal, mostly in 

 a simple series? J?a(??*«Z florets ot'teii producin.i? 

 5 riiamcnts destitute of antlici'S. Receptacle na- 

 ked. Pappus simple, scabrous. 



A polymorphous and divided genus? Some of the spe- 

 cies caulescent and also shrubby; those of Kurope and 

 North America, with a few others, often scapigerous, 

 scapes l-flov/ered, sometimes producing 1 or 2 pair of 

 opposite leaves; fiov.ers mostly yellow. 



Species. 1. A. montana. ^. fiifgen^jt^A- fn^gens. Ph, 

 2. p. 527. Scarcely dissimilar to spcajHpof the alpine 

 variety in the Banksian herbarium. H^TOn the margins 

 of marshy springs and in depressed situations, from the 

 Arikarees to Kort Mandan, and probably as far as the 

 Mountains. Flowering in July. Flowers bright yellow. 

 Obs. Minutely pubescent. Scape about 12 inches high, 

 mostly with 2 pair of leaves, terminated by 1 r.irely S 

 ilowers. Leaves oblong-lanceolate, 3 to 5 nerved; sum- 

 mit of the caudex tOmentose. Calix a simple series of 

 leaflets, somewhat hirsute. Tube of the florets pilose; 

 rays without filaments; seed hirsute, slender. A. planUi- 

 ginea, of Pursh from the specimen which I have seen, ap- 

 pears also a mere variety of the above. 



^. Doronicum. S.nudicaule. Doronimm niidiCauIe. Mich. 

 Z p. 121. J. davfon:. Ph. 4. viariurna. 



