190 AN INTRODUCTION 
Linear; when it is every where of the 
fame Breadth, though fometimes narrowing 
at the Extremities only. 
Acerof?, chaffy ; when itis linear and per- 
fitting; as in Pinus, Adies, Sfuniperus and 
Taxus. 
Subulate, Awl-foaped ; when it is linear 
below, but gradually contracting towards the 
Top. , 
Triangular, three cornered; when the Difk 
is furrounded by three prominent Angles. 
Quadrangular, Quinquangular, &c. four- 
cornered, five-cornered, &c. when four or five 
- prominent Angles lie round the Difk. 
Delioid, fthaped like a Delta * ; when the 
Figure is a Rhombus; that is, having four 
Angles, of which the two lateral ones are 
lefs diftant from the Centre than thofe at 
the Extremities. 
Rotund, round ; when it has no Angles. 
SINUS, a Hollow, is a Term ufed to ex- 
prefs thofe Openings or Cavities in Leaves 
which diftinguifh them into Parts: In re« 
{ped to thefe, Leaves are faid to be, 
Reniform, kidney-fbaped; when they are 
* A Greek Letter fo called. The Figure of the Dela 
is aTriangle, which does not exactly an{wer to the Chas 
“ratter here given of a Deltoid Leaf. 
roundifh, 
