132 SUBSTANCE, ETC. OF LEAVES. 



longs ; but his definition is foreign to the purpose, 

 seep. 119, and alludes to the outline of a flat 

 leaf. 



Trifjuetrum differs from trlgonum only in being 



used by Linnaeus for a three-sided awl-shaped 



leaf, as M. emarginatum, DHL Elth. t. 197, 



J\ 250, and bicolorum, t. 202, also Saxifraga 



burseriana. 



Tetragonum, f. 100, four-edged, having four pro- 

 minent angles, as Iris tuberosa, Fl. Gr&c. .41. 



Lingulatum, tongue-shaped, of a thick, oblong, 

 blunt figure, generally cartilaginous at the edges, 

 as MesGwbryanthemum linguiforme, Dendrobium 

 lingiuforme, E.rot. Bot. t. 1 1, and several species 

 of Saxifrage*, as S. mutata, Curt. Mag. t. 351, 

 S. Cotyledon, c. N 



Membranaceum, membranous, of a thin and pliable 

 texture, as in Aristolochia Sipho, t. 534, Rubus 

 odoratus, t. 323, Magnolia purpurea, t. 390, &c. 



Coriaceum, leathery, thick, tough and somewhat 

 rigid, as Magnolia grandiflora, and Hydrangea 

 fiortensis, Sm. Ic. Plot. t. 12, Curt. Mag. ^.438. 



Sempervircns, evergreen, permanent through one, 

 two, or more winters, so that the branches are 

 never stripped, as the Ivy, the Fir, the Cherry 

 Laurel, the Bay, &c. 



Dcciduum, deciduous, falling off at the approach of 

 winter, as in most European trees and shrubs. 



Alienatnm, f. 101, alienated, when the first leaves 



