7b. 1X.] LEAVES, 5. 
Fig. 30. 
198. Sagittate, (from sagitta, an arrow,) or arrow shaped 
leaf; this is represented at a, Fig. 30; the Sagittaria, or Ar- 
row-head, an aquatic plant, affords an example of this leaf. 
199. Acerose, or needle shaped ; this is represented at b, Fig. 
30. Leaves of this kind are mostly clustered together, as in 
the pine; they are swbulate, or pointed like a shoemaker’s awl ; 
they are rigid, or stiff, and evergreen. 
200. Trees with acerose leaves, are usually natives of moun- 
tainous or northern regions; any other kind of leaves would in 
these situations be overpowered by the weight of snow or the 
violence of the tempests; but these admit the snow and wind 
through their interstices; their many points or edges, presented 
even to a gentle breeze, produce a deep, solemn murmut in the 
forest; and when the storm is abroad, and the tempest high. 
“The loud wind through the forest wakes, 
‘With sound like ocean’s roaring, wild and deep, 
And in yon gloomy pines strange music makes.” 
198. What is a sagittate leaf? 
199. What is an acerose leaf? 
200. What is observed of trees with acerose leaves ? 
