96 SURFACE. 



as in the straws of many grasses, and it isfurrowed, when 

 these lines or depressions are deeper as in the stem of 

 wild Parsnip, and other umbelliferous plants. 



It is often desirable so express the number of par- 

 ticular organs, and no terms occur more frequently 

 than those which are employed for this purpose. Like 

 other technical names, they are sometimes derived 

 from the Greek, and sometimes from the Latin lan- 

 guage ; Thus 



A plant with A flower cup with 



One leaf is uni-foliate One leaf is mono-phyllous 

 Two leaves bi-foliate Two di-phyllous 



Three leaves tri-foliate Three tri-phyllous 

 Four leaves quadri-foliate Four tetra-phyllous 



Many leaves multi-foliate Many poly-phyllous 



These terms conjoined with others to be hereafter 

 explained, occur in the technical description of almost 

 every plant, and the student who has once learned 

 them, will have removed a very formidable impediment 

 to his future researches. 



