xviii PREFACE. 



dacese, Haloragacese, Amaiyllidaceae, Iridaceae, Typliacese^ Araceae^ 

 and Cucurbitaceae. The principles kept in view in effecting those 

 changes have been also observed throughout the present work, so 

 that standard English names for Classes and Orders are now no 

 longer wanting. The Author confidently believes that every intel- 

 ligent reader will admit that such names as Urn-mosses, Taccads, 

 False Hemps, Pepperworts, Bristleworts, Chenopods, Hydrocha- 

 rads. Scale-mosses, Birthworts, and Fringe-Myrtles are preferable to 

 Bry-a-ce-ae, Tac-ca-ce-se, Da-tis-ca-ce-se, El-a-ti-na-ce-se, Che-no- 

 po-di-a-ce-se, Des-vaux-i-a-ce-ae, Hy-dro-cha-ri-da-ce-ae, Jun-ger- 

 man-ni-a-ce-ae, A-ris-to-lo-chi-a-ce-ae, Cha-mae-lau-ci-a-ce-ae, and 

 other sesquipedalian expressions. 



University College, London. 

 October, 1845. 



