ABBREVIATIONS AND SIGNS 



short dash indicate the extremes 

 of variation, as "5-12 mm. long, 

 few-mauy-flowered," i.e. varying 

 from five to twelve millimeters in 

 length and from few to many flow- 

 ered. 

 section. 



co Of indefinite number, usually many. x crossed with, the sign of a hybrid. 



! A mark of atfirmation or authentica- 

 tion. 



? indicates doubt. 



$ Bearing stamens or autheridia hut 

 neither pistils nor archegonia. 



9 Bearing pistils or archegonia but 

 neither stamens nor antheridia. 



