SYNGENESIA NECESSARIA. 
577 
IV. NECESSARIA. 
659. CHAPTALIA. Vent. hort. cels 6l. 
1. C. foliis ovato-oblongis integerrimis subtus argenteo to- tomentosa . 
mentosis, scapo nudo unifloro, flore nutante.— 
l. c. cum icone. 
Tussilago integrifolia. Mick.fi. amer. 2. p. 121. 
Perdicium semiflosculare. Wdlt.fi. car. 204. 
In sand , fields and woods, in moist soil : Carolina to 
Florida. 1 /. . May, June. v. v. Flowers white, with 
a tinge of pale purple. 
6(50. SILPHIUM. Gen. pi 1334. 
l.S. caule superne hispido, foliis radicalibus caulinisque laciniatum. 
pinnatifidis, laciniis dentato-sinuatis, calycinis foliolis 
subcordatis acuminatis. — Willd. sp pl. 3. p. 2330. 
Icon. Linn.fil.fasc . 1. t. 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 levi, foliis caulinis sinuato-pinnatifidis, radica- compositum. 
libus ternatis sinuato- multifidis, floribus parvis pani- 
culatis. — Willd. sp. pl. 3. p. 2331. 
S. laciniatum. Walt. fl. car. 21 7* 
S. sinuatum. Herb. Banks, mss. 
In gravelly woods, near the sea-coast : Virginia and Ca- 
rolina. 2/. Aug. — Oct. v. v. Not above two feet 
high j flowers small. 
3. S. caule levi, foliis radicalibus amplis cordatis, caulinis terebinthina - 
alternis ovatis serratis scabris. — Willd. sp. pl. 3. cerni, 
p. 233 1 . 
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 tetragono levi, foliis oppositis connatis ovatis perfoliatum . 
serratis. — Willd. sp. pl. 3. p. 2331. 
j3. S. squamis calycinis quatuor exterioribus calyce interiore conjunctum, 
longiore. Willd. enum. 933. 
Jn the Allegany mountains : Pensylvania to Carolina. 
