SYNGENESIA SUPERFLUA. 417 



gous ; the lower ones with appressed serratures ; racemes paniculate, 



widely spreading. 



HAB. Stony fields. Sept. Oct. 'Zj.; stem 4 feet high. 

 S nemoraiis : stem erect, woolly; cauline leaves lanceolate, hispid, 



very entire ; radical ones sub-cuneiform, serrate ; racemes panicu- 

 late, secund. 



HAB. Barren fields. Sept. Tj. ; plant gray, 1 2 feet high. 

 S. patula : stem erect, smooth ; leaves elliptical, serrate, smooth ; lower 



ones oblong-spathulate ; racemes paniculate, secund, spreading; 



peduncles pubescent. 

 HAB. Dry woods. Sept. 7). ; stem % feet high, virgate; racemes 



short. 

 S. ulmifolia : stem erect, smooth, striate ; leaves elliptical, deeply 



serrate, acuminate, villous beneath ; radical ones obovate ; racemes 



paniculate, secund ; peduncles villous ; rays short. 

 HAB. Low grounds. Aug. Sept. 94- ; stem 3 feet high ; leaves 



large. 

 S. arguta : stem erect, smooth ; leaves smooth, acutely and unequally 



serrate ; cauline ones elliptical ; radical ovate-oblong ; racemes pan- 

 iculate, secund ; rays elongate. 

 HAB. Meadows. Aug. Q|; stem 2 feet high. 

 S. odora : stem erect, pubescent, slender ; leaves linear-lanceolate, 



very entire, smooth, scabrous on the margin ; racemes paniculate, 



secund. 

 HAB. Rocky hills and dry woods. July Aug. 1}.; stem subvirg. ; 



plant odorous. 



* * * Racemes erect. 



S. bicolor : stem hairy; leaves elliptic, hairy; lower ones serrate; 

 branches leafy ; racemes short, dense, erect ; scales of the calyx ob- 

 tuse. 



HAB. Dry hills and woods. July Aug. 1|_; stem 1 2 ft. high; 

 rays white. 



S. stricta : stem erect, smooth ; cauline leaves lanceolate, very entire, 

 smooth, scabrous on the margin ; radical ones serrate ; racemes pan- 

 iculate, erect; peduncles smooth. 



HAB. Sandy woods. Sept. Q|; stein 2 feet high ; panic, dense. 



S. lanceolata : stem angular, hairy, much branched ; leaves lanceo- 

 late-linear, entire, 3 5-nerved, scabrous on the margin, minutely 

 hispid on nerves beneath ; corymbs terminal, fastigiate ; rays 15 20, 

 as long as the disk. 



HAB. Meadows. Sept. '2J. ; stem 3 4 feet high ; Jl. glomerate ; 

 cal. orate. 



S. caesia : stem smooth, glaucous, erect ; leaves lanceolate, smooth ; 

 racemes erect ; rays of middling length. 



HAB. In dry woods. Sept. Tj. ; stem slend., 2 feet high, subvir- 

 gate ; pedicels scab. 



S. jlexicaulis : stem flexuous, smooth, angular; leaves ovate-lanceo- 

 late, acuminate, serrate, glabrous; racemes axillary; rays half as 

 long again as the calyx. 



HAB. Fields and woods. Sept. l^.; stem slender, purp.,Q feet high 

 racem. short. 



S. latifolia : stem somewhat flexuous, angular, smooth ; leaves broad- 



