HISTORICAL SKETCH. 9 



Emmons, Cooper, Torrey, Leavenworth, Mitch- 

 ell, Pickering, Boykin, Short, Peters, H. H. 

 Eaton, Loomis,Cooley, Clinton, Booth, Leitner, 

 the two brothers Green and Leconte with some 

 others. Several are yet living and may do 

 more hereafter. 



Those who have never published any thing, 

 altho' they collected Herbals, and were practi- 

 cal Botanists, are chiefly Collins, Miller, Wray, 

 Pitcher, Hall, Vanvleck, Lyons, Herbemont, 

 Habersham, Squib, Enslen, Boykin, Williams, 

 Hitchcock, Hingston, Ingalls, Simmons, Gri- 

 swold,Gates,Whitlow,Knevels,Steinhauer,Gais- 

 senhauer, Durand, Griffith, Fisher, Mac Wil- 

 liams, with many others mentioned by Elliot, 

 Hooker and Eaton as having helped their labors. 

 These collectors are often very useful to the 

 others by imparting specimens, localities and 

 facts : their number is increasing, and several 

 may yet become writers or improvers. 



It is from such that I have received much 

 help by gifts or exchanges of specimens, new 

 facts and observations. I have reckoned par- 

 ticularly among my friends and assistants, Col- 

 lins, Durand, Miller, Short (2 brothers and a 

 sister) Walton, Hall, Carr, Hingston. Mac Wil- 

 liams, Vanvleck, Gaissenhauer, Ward, Mease, 

 Bradbury, Kin, Ridgely, Mrs. Holley born 

 Austin, Hart, Crocket, Limner, Duval, Law- 

 rence, Knevel, &c. 



But I have received also many specimens 

 from professed Botanists, Muhlenberg, Torrey, 

 Beck, Schweinitz, Elliot, Cutler, Eaton, Brad- 

 bury, Brickell, Halley. Short, Eddy &c. all 

 American Botanists, chiefly by exchanges of 

 my own or purchases; besides some Ameri- 

 can plants received form foreign Botanists 



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