APPENDIX. 



diameter and stemless. 4-16 inches high. Me. to Pa., 

 Mich., and northwest. 



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Alisma Geyeri ^ distinctly northern and local species 

 Magenta pink similar to A. plantago-aqtiatica but the 

 July-Septem- leaves narrower and the flowering stems 

 less spreading. There are 2-4 flower-stalks 

 all taller than the long-stemmed, linear lance-shaped or 

 elliptical leaves. The delicately pale magenta-pink flow- 

 ers with a yellow base are about ^ inch broad, and are 

 borne in 1-2 whorls or circles about the tall stalk on 

 rather thick stems ; the tiny sepals are margined with 

 pink. 1-3 feet high. Local in shallow water from N. Y. 

 to N. Dak. and the Pacific Slope. 



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e ... . A small northern species 8-20 inches 



Sagittaria 



arifolia high, with broad acute sagittate leaves 



August- having spreading lobes, and flowers of the 



September secO nd order. The plant grows both in 

 and out of the water, and in the latter case develops very 

 long-stemmed leaves, and also a number of broadened 

 stems without leaves called phyllodia. Seed winged all 

 about and with a tiny erect beak. 8-18 inches high. 

 Quebec to central Me., Vt., Mich., Kan., Dak. and Cal. 

 Sagittaria ^ ^ a ^ an( * stout western species, with 



brevirostra acute, sagittate leaves the lobes of which 



July-Septem- are as long as the blade. Flower-stalk 

 ber simple or branched 8-20 inches long, flow- 



ers of the second order. Achenes with a tiny, nearly 

 erect beak scarcely extending beyond the wing. 2-4 feet 

 high. Rivers, swamps, etc. Ind. to Kan. 

 Sagittaria ^ verv tall species with lance-shaped 



landfolia leaves, thick or leathery, acute, with 5-9 



July-Septem- veins, the blade 5-18 inches long, on a 

 ber thick elongated stem. Flowers of the 



second order, the filaments cobwebby-hairy. Achenes 

 curved, winged, and with an oblique beak. 2J-5 feet 

 high. Swamps and shallow water. Del. and Md. , south 

 to Fla., and west to Mo. and Tex. Commoner near the 

 coast. 



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