SYNGENESIA NECESSARIA. 



^17 



IV. NECESSJRIA. 



659. CHAPTALIA. Fent. hort. lels 6l. 



. C. foliis ovato-oblongis integerrlmis subtus argenteo to- 



mentosis, scapo nudo uriitioro, flore nutaule. — Fent. 



I. c. cum icone. 

 Tussilago integrifolia. Mich. fl. amer.2. p. 121. 

 Perdicium semitlosculare. fFalLji. car. 204. 

 In sand- fields and woods, in moist soil : Carolina to 



Florida. 11 • May, June. v. v. Flowers white, with 



a tinge of pale purple. 



tomentosa- 



660. SILPHIUM. Gen. pi. 1334. 



l.S. caule snperne hispido, foliis radicalibus caulinisque laciniatum. 



pinnatifidis, laciniis dentato-sinuatis, calycinis foliolis 



subcordatis acuminatis. — IFilld. sp. pi. 3. p. 2330. 

 Icon. Linn.Jil.fasc. 1.^3. 

 On the banks of rivers in the western territories, parti. 



cularly on the Mississippi. % . Aug. — Oct. v. v. 



From eight to twelve feet high ; flowers large, and, as 



all the rest of the genus, yellow. 



2. S. caule laevi, foliis caulinis sinuato-plnnatifidis, radica- composiium. 



libus ternati-; siiuiuo- multifidis, floribus parvis pani- 

 culatis. — IFilld. sp. pi. 3. p. 2331. 



S, laciniatum. JValt. fl. car. 2\7- 



S. sinuaium. Herb. Banks. ?nss. 



In gravelly woods, near the sea-coast : Virginia and Ca- 

 rolina. 1/. Aug. — Oct. V. V. Not above two feet 

 high ; flowers small. 



3. S. caule laevi, foliis radicalibus amplis cordatis, caulinis terelinthina- 



alternis ovatis serratis scabris. — Willd. sp. pi. 3. ceum. 



p. •<!33I. 

 Icon. Jacc}. hort. 1. ^ 43. 

 In the western mountains and Louisiana. Ij. . Aug. — 



Oct. V. V. About live feet high ; radical leaves very * 



large, 



4. S. caule tetragono laevi, foliis oppositis connatis ovatis perfoHatum, 



serratis.— Willd. sp. pi. 3. p. 233 1 . 

 B. S. squamis calycinis quatuor exterioribus calyce mteriore conjunctum. 

 longiore. IFilld. enuni. 933. 

 In the Allegany mountains : Pensylvania to Carolina. 



