SYNGENESIA SUPERFLUA. SenCcio. 529 



2. S. caule virgato-paniculato, foliis amplexicaulibus ob- hieracifoUus. 



longis acutis inaequiiliter acuteque protbnde dentatis, 

 calycibus laevibus. — IFUld.sp. pl.3. p. IQ74. 



Icon. Pluk. phyt. t.\\.2.f.\. mala. 



On road sides and in newly cleared grounds : Canada to 

 Carolina. O- July, Aug. v. v. From two to five 

 feet high. This is one of the plants which spring up 

 in the most remote western countries, when the land 

 is cleared of timber^ particularly when the brush- 

 wood is burnt on the ground ; from which circumstance 

 it is generally known by the name of Fire-weed. I 

 have frequently found it covering a square piece of 

 cleared land, when there was not a single plant to be 

 found in any other place for a considerable distance 

 round it. 



3. S. glaber; foliis radicalibus spathulatis serratis in petio- elongatus. 



lum atienuatis, caulin.s pinnatifidis dentatis remotis- 

 simis. pedunculis elongatis umbellato-corymbosis. 

 On rocks, near the banks of rivers : about Easton, Pen- 

 sylvania. 1/ . July, Aug. v. v. Resembling No. 8, 

 but is destitute of a ray. 



4. S. giiber; foliis radicalibus longe petiolatis ovato-sub- pauciflorus. 



rotundis subcordatis dentatis, caulinis 2. remotis pin- 

 ' natifidis dentatis, pedunculis brevibus subternis um- 



bellahs. 

 S. tussitaginoides. Walt. ft. car. 20S ? 

 In Labrador. Colmaater. In Carolina. Walter. % . 



V. s. in Herb. Dickson. Not above a span high. 



** Floriliis radintis. 



5. S. caule simplicissimo rigide erecto subnudo, foliis om- pduperculus. 



nibus lanceolatis, radicalibus subintegris inciso-denta- 

 tisque, corymbo paucifloro, calycibus glabellis, radiis 

 parvulis. — 3'Iich.Ji. amcr. 2. p. 120. 

 About lakes: Canada. Michaux. +. A small plant ; 

 flowers the size of S. Jarobcea. 



6. S. foliis radicalibus longissime petiolatis orbiculatis sub- gracilis. 



cordatis crenatis, caulinis paucis remotissimis lineari- 

 oblnngis basi dilatatis inciso-dentatis, pedunculis bre- 

 vissimis hirsutis subumbellatis, calycibus glabellis, 

 radiis paucis brevissirais. 



S. strictus. Herb. Banks, mss. 



On the rocky banks of rivers ; Pensylvania. 1/. May 

 — Aug. V. V. ; V, s. in Herb. Banks. About a foot 



