194 DICOTYLEDONOUS PLANTS. 



HAB. Sandy fields. N. J. Nutt. It.Sfem brownish, 



1 2 feet high. Racemes shorter than the lower leaves, collect- 

 ed into a leafy spike ; rays bright yellow. Resembles S. nemo- 

 ralis. 



* Scales of the calyx agglutinated. Ray florets 10 20, very small, yellow. 

 Receptacle setose. EUTHAMIA. Nutt. 



39. 8. lanceolata Ait : stem much branched, angular, hairy j leaves 

 lanceolate-linear, very entire, nearly erect, 3 5-nerved, somewhat 

 scabrous on the margin, nerves beneath minutely hispid ; corymbs ter- 

 minal, fastigiate ; branches clustered ; rays 1520, as long as the disk. 

 Chrysocoma gramintfolia Linn. Euthamia graminifolia Nutt. 



HAB. Fields and meadows. Can. and N. S. N. to Subarc. Amer. 

 Sept., Oct. If.. Stem 2 3 feet high, with the branches very* 

 numerous. Flowers numerous, clustered in a terminal corymb. 



40. S. tenuifolia Pursh : stem angled, scabrous, with fastigiate 

 branches ; leaves very narrow, linear, spreading, obscurely 3-nerved, 

 scabrous on the margin, the axils leafy ; corymbs terminal, fastigiate, 

 heads clustered ; rays about 10, scarcely as long as the disk. S. lan- 

 ceolata var. minor Mich. Euthamia tcnvifolia Nutt. 



HAB. Pine barrens. N. J. to Flor. Sept., Oct. It. Stem 12 18 

 inches high. Leaves linear, covered with glandular dots. Scales 

 of the involucre viscid. Every way smaller than the preceding. 



26. CHRYSOCOMA. Linn. 



Involucre imbricate, oblong or hemispherical. Style scarce- 

 ly exserted. Receptacle naked. Pappus pilose, scabrous. 

 Rays crowded and unequal. Acincs pubescent. 



Syngenesia. JEqualis. 



C. virgata Nutt : herbaceous and every where smooth ; stem vir- 

 gately branched ; branches corymbiferous, fastigiate; leaves all narrow 

 and linear ; involucre oblong, 3 4-floweredj scales glutinous and ap- 

 pressed. 



HAB- Swamps. N. J. 11. Stem 18 inches high and branched 

 nearly from the base. Leaves 1 2 inches long, smooth and 

 thickish, somewhat remote, flowers yellow. 



27. BOLTONIA. L'Herit. 



Involucre imbricate. Rays numerous. Receptacle conic, 

 punctate. Seines flat and margined. Pappus consisting of 

 many minute setae, with two of them opposite and mostly 

 elongated. Syngenesia. Superflua. 



1. B. glastifolia L'Herit : lower leaves serrate ; flowers on short pe- 

 duncles ; seeds obcordate, conspicuously winged, pubescent ; awns of 

 the pappus 2, nearly of its own length. 



HAB. Banks of streams. Penn. to Virg. July, Aug. H. 

 2, feet high. Leaves linear, alternate. Flowers reddish. 



