KINDS OF STEMS. 123 



Engl. Bot. t. 28, and Hydrangea hor- 

 temis, Sm. Ic. Pict. t. 12. 

 Anceps, two-edged, as Sisyrinchium stria- 

 tum, Sm. Ic. Pict. t. 9. S. gramineum, 

 Curt. Mag. t, 464, and some of the 

 genus Lathyrus. 

 Trigmms, or Triangularis, triangular or 

 three-edged, as Cactus triangularis, 

 Plukenet.t. 29./. 3. 

 Triqueter, three-sided, is applied to a stem 



with 3 flat sides. 

 Tetragonus, or Quadrangular is, square, 

 as Lamium album, White Dead-nettle, 

 E?i<rl. Bot. t. ?68, and a multitude of 

 other plants. 

 Pentagonusy or Quinquangularis, five- 

 sided, as Asparagus horrid his , Cavanil- 

 les Ic. t. 136, where however the cha- 

 racter is not well expressed. 



When the number of angles is either 

 variable, or more than five, it is usual 

 merely to describe the stem as angu- 

 losus, angular, except where the precise 

 number makes a specific difference, as 

 in the genus Cactus. 

 Alatus, winged, when the angles are ex- 

 tended into flat leafy borders, as Passi- 

 2 



