APPENDIX. 



Page 4 



sparganium ^ ne same height as S. americanum var. 



americanum androcladum, but the flower-stalk not 

 June-August branched. Leaves thin and pliant, barely 

 | inch wide. Fruit-heads stemless or nearly so. Bogs 

 or shallow water. Me. to La. and Va. 



Similar to S. americanum var. androda- 

 Sparganium dum, but with shiny fruit, and stiffer, 

 longer, stronger-keeled leaves which are 

 much taller than the simple or branched flower-stalks. 

 Fruit-heads often 1 J inches in diameter, the beak of the 

 fruit J inch long, 2-3 feet high. Shores of muddy 

 ponds, etc. Mass, to Pa., 111., and Mo. 



A northern species with a stout stem 

 Spargamum an( j thin, narrow leaves J inch more or 

 less wide, with a thin, dry, colorless margin 

 toward the base. Flower-heads stemless or nearly so, 

 the lower ones growing from a point slightly above the 

 junction of plant and leaf stem. Fruit-head 1 inch or 

 less in diameter. 1-2 feet high. Borders of ponds and 

 sluggish streams. Me. south to Conn, and west to S. 

 Dak. The var. acaule is a dwarf form 4-12 inches high, 

 with fruit-heads J to f inches in diameter. Rare. Me. 

 to la. and W. Va. 



A slender and very narrow^leaved species 

 Sparganium floating in deep water. Leaves long, f 

 inch or less wide, and opaque. Flower- 

 stalk simple, the heads a trifle above the leaf junction, 

 J-f inch in diameter, and with or without a very short 

 stem. 1-4 feet high. In ponds and sluggish streams, or 

 mountain tarns. Me. to N. Y. and northwest. 



A long and slender-stemmed species 

 Sparganium with thin i eaves i_i i nc h wide. Flower- 

 stalk branched, the 2-3 branches bearing 

 3-5 heads f inch in diameter. 2-3 feet high. Margins 

 of cold ponds, often in 3 feet of water. Me. to Pa. and 

 Minn. 



A small and slender species common in 



Sparganium coldj shallow ponds and streams of the 



north. Leaves thin, limp, and grasslike. 



Flower-stalk simple; the fruit-heads less than J inch in 



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