xl INTRODUCTION. 
Cav. = 
Cavanilles. 
Nutt. = 
Nuttall. 
Cham. 
Chamisso. 
Pav. 
Pavon. 
Chav. 
Chavannes. 
Ptrs. 
Persoon. 
DC. 
De Candolle. 
Pluk. 
Plukenet. 
Desf. 
Desfontaines. 
Plum. 
Plumier. 
Dew. 
Dewey. 
Poir. 
Poiret. 
Dill. 
Dillenius. 
R. Br. 
Robert Browf. 
Ehrh. 
Ehrhart. 
Raf. 
Rafinesque. 
ELI. 
Elliott. 
Rich. 
Richard. 
Endl. 
Endlicher. 
Richards. 
Richardson. 
Eng elm. 
Engelmann. 
Rccm. 
Rcemer. 
Gcertn. 
Gsertner. 
Salisb. 
Salisbury. 
Gmel. 
Gmelin. 
Schimp. 
Schimper. 
Good. 
Goodenough. 
Schk. 
Schkuhr. 
Grev. 
Greville. 
Schlecht. 
Schlechtendal. 
Griseb. 
Grisebach. 
Schrad. 
Schrader. 
Gronov. 
Gronovius. 
Schreb. 
Schreber. 
Hedw. 
Hedwig. 
Schult. 
Schultes. 
Hoffm. 
Hoffmann. 
Schw. or Schwein. Schweinitz. 
Hook. 
Hooker. 
Schwcegr. 
Schwagrichen. 
Homsch. 
Hornschuch. 
Scop. 
Scopoli. 
Huds. 
Hudson. 
Soland. 
Solander. 
Jacq. 
Jacquin. 
Spreng. 
Sprengel. 
Juss. 
Jussieu. 
Steud. 
Steudel. 
L . or Linn. 
Linnaeus. 
Sulliv. 
Sullivant. 
Lag. 
Lagasca. 
Tayl. 
Taylor. 
Lam. 
Lamarck. 
Torr. 
Torrey. 
Lamb. 
Lambert. 
Torr. Gr. 
Torrey and Gray 
Ledeb. 
Ledebour. 
Tourn. 
Tournefort. 
LHer. 
L’Heritier. 
Trin. 
Trinius. 
Lehm. 
Lebmann. 
Tuck, or Tuckerm. Tuckerman. 
Lestib. 
Lestibudois. 
Vaill. 
Vaillant. 
Lindenb. 
Lindenberg. 
Vent. 
Ventenat. 
Lindl. 
Lindley. 
VUl. 
Villars. 
Michx. 
Michaux (the elder). 
Wahl. 
Wahlenberg. 
Michx.f. 
F. A. Michaux (the 
Walt. 
Walter. 
Mill. 
Miller, [younger). 
Web. 
Weber. 
Mitch. 
Mitchell. 
Willd. 
Willdenow. 
Mont. 
Montagne. 
Wils. 
Wilson. 
Muhl. 
Muhlenberg. 
Wulf. 
Wulfen. 
Nees. 
Neesvon Esenbeck. 
