258 LANDSCAPE GARDENING. 



in some places it spreads so rapidly from self-sown seed as 

 to become a nuisance unless heroically weeded out in the 

 early summer. 



Many native plants are useful for decorating borders of 

 ponds and streams, among the best of which are the fol- 

 lowing: CAT-O'-NINE-TAIL (Typha latifolia), BURWEED 

 (Sparganium simplex), WATER-PLANTAIN (Alisma plan- 

 tago), ARROWHEAD (Sagittaria varialilis), SCOURING- 

 RUSH (Equisetums sp.), BULRUSH (Scirpus sp.), PICKEREL- 

 WEED (Pontederia cordata), BUR-MARIGOLD (Bidens sp.), 

 and many species of sedges (Carex), all of which are found 

 in or about our ponds and streams and may be easily trans- 

 planted to more cultivated locations. Some of them, like 

 the Bidens and Typha, etc., seed very freely, and a little 

 heroic thinning will be needed to prevent them from over- 

 running the space needed for more desirable plants. 



Hardy Ferns. 



There are many hardy species of large-growing ferns that 

 are beautiful and easily grown and especially suited for the 

 decoration of shaded places. They thrive best in a rather 

 moist soil, but if in the shade many of them will grow 

 luxuriantly in even thin soil. They are easily transplanted 

 and may be moved from the woods or roadside at almost 

 any time if a large clump of roots and soil is taken up, but 

 perhaps the best time is when they are beginning to grow 

 in the spring and early summer. 



Among the best are: MAIDENHAIR FERN (Adiantum 

 pedatum), CINNAMON FERNS (Osmunda regalis, cinna- 

 monia, and Clay toni ana), CHRISTMAS FERNS (Aspidium 

 marginale), SWORD-FERN (A. acrostichoides), OSTRICH 



