114 THROUGH GLADE AND MEAD. 
by an arrangement provided for even in the bud. 
The scar left where a leaf-stem or a fruit-stem has 
separated from the branch indicates in some degree 
how this is brought about. 
September has, like August, some of the bright- 
colored flowers. The golden-rods and asters which 
appeared in August are reénforced by others during 
this month. It is not difficult now to find a dozen 
species of aster, some of which as Aster vimineus, Lam. 
and A. multiflorus, Ait. are very common. In fact, if 
we except the genus Carex, the genus Aster is our most 
abundant genus so far as the number of species, if not 
of individuals, is concerned. On the gravelly margin of 
the ponds, between high and low water mark, the little 
pipewort still rears its dense heads of small flowers, and 
close by it the little hedge hyssop gives a tinge of yel- 
low to the shore. In some little pools the trailing stems 
of the water purslane (Ludwigia palustris, Ell.) suggest 
the almost ineradicable purslane of the gardens. Coarse 
grasses are now in the forefront. Barnyard-grass (Pan- 
icum Crus-gallt, L.) and old-witch grass (P. capillare, 
L.) and crab-grass (P. sanguinale, L.), the foxtails 
(Setaria glauca, Beauv. and S. viridis, Beauv.), the 
beard-grasses (Andropogon scoparius, Michx. and A. 
Jurcatus, Muhl.) by the wayside, and the wood-grass 
(Chrysopogon nutans, Benth.) and the drop-seed grass 
(Muhlenbergia Willdenovii, Trin.) and the wood reed- 
