1917 Al tWS—LO] We: NE 501 
] NDREWS—LONGLEAF PINES 
the southern forests is here replaced bya correspondingly arid growth 
of “old field broom” (principally Andropogon furcatus, A. virginicus, 
and A. scoparius), with a few sedges (Scleria triglomerata, Cyperus 
retrofractus, etc.) intermixed. In fact, the only difference in the 
environment of the two groups is the isolated position of the knoll, 
Fic. 3.—Large clump of spearlike leaves near upper lefthand corner is longleaf 
seedling; others are grasses that have sprung up since fire; skeleton plant on right 
and white patches in background are hardwood seedlings and bushes killed by fire 
that left pine seedling unharmed. 
the top of which is protected by an encircling turnpike road and by 
the wooded slopes of two deep ravines, watered by mountain springs 
and clothed with a heavy growth of broad-leaved trees, conditions 
which oppose an effective barrier against the spread of fire. 
