200 DICOTYLEDONOUS PLANTS. 



are aptly compared by Mr. Nuttall to those of the Podophyttum 

 peltatum, although they are not BO large. 



3. T. farfara Linn. : scape 1-flowered, bracteate j flowers rayed ; 

 leaves cordate, angular, toothed, pubescent beneath. 



HAB. Low grounds. April. 2J..~Stem 6 10 inches high. 

 Flowers appearing before the leaves. Introduced ? . Coifs-foot. 



34. SENECIO. Linn. 



Involucre cylindric, scaly at base ; scales withered at the 

 points. Receptacle naked. Pappus simple, capillary and co- 

 pious. Syngenesia. Superflua. 



* Hovers radiate. 



1. & gracilis Pilrsh : radical leaves on very long petioles, orbicular, 

 eubcordate, crenate ; cauline ones few, very remote, linear-oblong, 

 dilated at base, incisely toothed ; peduncles very short, hairy, some- 

 what umbelled ; involucre smooth ; rays few, very short. 



HAB. Rocky banks. Penn. N. to Subarc. Amer. May Aug. 

 21. Stem a foot high, very slender. Flowers small, yellow. 



2 % S. oho rat us Wittd. : stem smooth! si ; radical leaves obovate, cre- 

 nate-serrate, petiolate ; cauline ones pinnatifid, toothed; flowers some- 

 what umbelled, on long peduncles. 



HAB. Rocky hills. N. Y. to Virg. June, July. !(. Stem a 

 foot high, simple. Flowers in small terminal panicles. Rays 

 1012, yellow. 



3. & balsamitfB Willd- : tem and peduncles villous at the base ; rad- 

 ical leaves oblong, serrate, petiolate ; lower cauline ones lyrate-pinnati- 

 fid, serrate ; upper pinnatifid- toothed ; flowers somewhat umbelled. 

 S. lyratiu Mich. 



HAB. Damp grounds. Can. to Car. N. to Subarc. Amer. June, 

 July. 1. /Stem 12 feet high, smooth except at the base. 

 Flowers in small terminal umbels. Rays 10 12, deeply 3-clefl. 



4. & aureus Linn. : radical leaves ovate, cordate, serrate, petiolate ; 

 cauline ones pinnatifid, toothed, the terminal segments lanceolate ; 

 peduncles thickened ; flowers somewhat umbelled. 



HAB. Shady woods. Can. to Car. N. to Subarc. Amer. June, 

 July. If. Stem 2 feet high. Radical leaves on long petioles^ 

 Flowers in a simple terminal umbel, yellow. 



5. S. dubius Beck : woolly and toraentose ; radical' leaves on long 

 petioles, spathulate-obovate and ovate, somewhat acute and pinnatifid ; 

 cauline ones 23, linear, pinnatifid ; . flowers corymbed. S. heterophyl- 

 lus Nutt. Torr. Cineraria heterophyUa Pursh. C. dubia Spreng. 



HAB. Rocks in Blue Mountains. Penn. Pursh. May, June. 

 If. Stem about a span high. Flowers deep yellow. I have fol- 

 lowed Mr. Nuttall and Dr. Torrey in placing this plant under 

 genus Senecio, although there is still some doubt whether it 

 really belongs to this or to Cineraria. Mr. Nut-tall thinks it a 

 variety of C. integrifoUa of Willdenow and Pursh, a plant which 



