STRUCTURAL BOTANY. 



33 



75, By reason of certain peculiarities of their epider- 

 mis, plants and their parts are said to be : 



Cut vn. 



a, A piece of epidermis of Al'mm, with 3 stomata ; 6, a tabular cell, detached 

 from the epidermis of Callilriche. 



Pilose : hairy, bearing soft, slender hairs, as the stem 

 of Stachys palustris ; 



Pubescent or downy : bearing fine, soft hairs, or pubes- 

 cence, as Pentstemon puhescens ; 



Puberulent: covered with fine, short, and almost imper- 

 ceptible down, as the stem of Lobelia puberula ; 



Ilisjpid: bristly, beset with stiff hairs, as Lithos^er- 

 inxim hirtmn ; 



Hirsute : hairy with rather stiff or beard-like hairs, as 

 Gonolobus hirsutus / 



Tomentose: covered with matted, woolly hairs, as the 

 leaves of Vei^bascum Thajpsus ; 



Villous : clothed with long and soft hairs, as the fila- 

 ments of Yerbascum Thapsus ; 



Sei^iceous: silken with usually appressed, shining hairs, 

 Potentilla anserinai 



Glabrous : smooth, without pubescence of any kind ; 



Lcevigate : smooth, as if polished ; 



