ALISMACEAE 



87 



I. 5. subulata. 



2. 5. lorata. 



3. Lophotocarpus T. Durand.* 

 L. spongiosus (Engelm.) J. G. Smith. Mass. to Va. 

 Conn. Along the coast, not common. 

 N. Y. Reported along the coast; and up the Hudson within the 



influence of brackish tide water. 

 N. J. Known only from the Hackensack marshes and as reported 

 from Camden Co. in Britton's N. J. flora. Also along the 

 Raritan from New Brunswick to South Amboy, but rare (accord- 

 ing to Mackenzie). 



4. Sagittaria L.* 



Fruit-bearing pedicels reflexed or recurved. 



Filaments about as long as the anthers; achenes with 3 



undulate or slightly toothed crests. 

 Filaments much longer than the anthers; achenes with 5-7 

 tuberculate or prominently toothed crests. 

 Fruit-bearing pedicels ascending. 

 Leaf-blades without basal lobes. 



Pedicels of the pistillate flowers as long as the 

 staminate ones, or nearly so. 

 Leaf-blades terete or 3-sided, often imperfectly 



developed. 

 Leaf-blades flat. 

 Pedicels of the pistillate flowers very short or nearly 

 wanting. 

 Leaf-blades with basal lobes (reduced to phyllodia in 

 No. 6). 

 Achenes minutely or inconspicuously beaked. 

 Beak horizontal. 

 Beak erect. 

 Achenes prominently long beaked. 

 Beak horizontal. 



Inflorescence pubescent. 

 Inflorescence glabrous. 

 Beak erect. 



Achenes cuneate, usually with 2 prominent 



facial wings. 

 Achenes obovate or orbicular-obovate, usu- 

 ually with I facial wing. 



5. teres. 

 S. Eatoni. 



5. 5. rigida. 



6. 



5. graminea. 

 S. cuneata. 



8. -S. pubescens. 



9. 5. latifolia. 



10. S. Engelmanniana. 



11. S. longirostra. 



i. S. subulata (L.) Buch. In tide water mud: Conn, and N. Y. 

 to Fla. and Ala. 



Conn. Along the coast and up the brackish rivers. 

 N. Y. Along the coast and up the Hudson as far as Peekskill. 

 N. J. Along the coast and up the brackish rivers, but apparently 

 wanting in the pine-barrens. 

 * See footnote, page 76. 



