SYNGENESIA NECESSARIA. 



^n 



IV. NECESSARIA. 



^5^. CHAPTALIA. Vent. hort. ^eU (3l. 



1. C. foliis ovato-oblongis integerrimis subtus argenteo to- 



mentosis, scapo nudo unifloro, flore nutanle. — Vent. 



I. c. cum icone. 

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

 Pevdicium seniillosculare. IVaU.Ji. car. 204. 

 In sand V tiel.ls and woods, in moist soil: Carolina to 



Florida. 1/ . May, June. v. v. Flowers white, with 



a tinge of pale purple. 



tomenioicu 



660. SILPHIUM. Gen. pi. 1334. 



l.S, caule superne hi'^pido, foliis radicalibus caulinisque laciniatum. 



pinnatifidis, laciniis dentato-sinuatis, calycinis foliolis 



subcordatis acuminatis. — Willd. 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. 1/ . 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-pinnatifidis, radica- composilum. 



libus t,'rnu's Vein o- muUifidis, floribus parvis pani- 

 culatis. — IVilld. sp. pL 3. p. 2331. 



S, laciniatum. JFulL ft. car. 'ixy. 



S. sinuatum. Herb. Banks, mss. 



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. — JVilld. sp. pi. 3. ceuvi. 



p. V.33 I . 

 Icon Jacq. hort. 1. t. 43. 

 In the western mountains and Louisiana. 1/. Aug. — 



Oct. V. V. About five feet high j radical leaves very 



large. 



4. S. caule telragono l.-cvi, foliis oppositis connatis ovatis perfoUatum. 



serratis.— I'f' aid. sp. pi. 3. p. 2331. 



5. S, squamis calycinis quatuor exteriorious calyce interiore conjunctum. 



longiore. fVil/d. tnum. 933. 

 In the Allegany mountains : Pensylvania to Carolina. 



