XXVI 



INTRODUCTION. 



Rich. 



Solisb. 



ScJik. 



Schrad. 



Schreb. 



Schw. 



Scop. 



Shuttliv. 



Sulliv. 



Twr. 



Richard. 



Salisbury. 



Schkuhr. 



Schrader. 



Schreber. 



Schweinitz. 



Scopoli. 



Shuttle-worth. 



Sullivant. 



Torrey. 



Tourn. 



Trin. 



Tuck. 



Vent. 



Wahl. 



Wang. 



Walt. 



WaUr. 



Wendl. 



Willd. 



Toumefort. 



Trinius. 



Tuckerman. 



Ventenat. 



WaMenberg. 



Wangenheim. 



Walter. 



Wallroth. 



Wendland. 



Willdenow. 



IV. SIGNS USED IN THIS WORK. 



(l) An annual plant. 

 A biennial plant. 

 1J. A perennial plant. 



The length in feet; as, " 2 long," two feet long. 

 ' The length in inches; as, "2' long," two inches long. 

 " The length in lines; as, "2" long," two lines long. 

 (*) Placed at the end of a specific character, denotes that the species is not 'well 



known. 



Two adjectives connected by a hyphen denote a form intermediate between the 

 two; as, "ovate-lanceolate," between ovate and lanceolate. 



Two figures connected by a dash, as "stem 4 -6 long," denote that the length 

 of the stem varies from four to six feet. 



n. sp. > indicate that the species, or genus, is new, or has not been previously 

 n. gen. ) characterized. 



