THE CAYUGA FLORA. 103 



398. Sympeocarpus, Salisb. 



965. *S. fcetidus, Salisb. Skunk-cabbage. (H. and C.) 

 Marshes ; common. March-April. 



399. Acorus, Linn. 



966. * A. Calamus, L. SwEET-FLAG. (H. and C.) 

 Sedg}' marshes ; common. June. 



LEMNACEiE. 



400. Lemna, Ivinu. Duckweed. 



967. L. trisulca, L. (H. and C.) 

 Water, in marshes and ponds ; very abundant about Cayuga Lake. 



Jenning's Pond, Danby, Summit marsh and elsewhere. 

 96S. L. minor, L. (H. and C. 1 



Pools and larger marshes ; abundant. 



401. Spirodeea, Schleiden. 



969. S. polyrrhiza, Schleid. (Lemna polyrrhisa, L. Man., p. 479.) 



(H. and C.) 

 Pools and marshes ; common. 



402. Wolffia, Horkel, Schleiden. 



970. W. Columbiana, Karst. 



Caj-uga Marshes, west of Cayuga Bridge. Southwest of the rail- 

 road bridge over Seneca R. Montezuma Marshes, near the " Marl 

 Works, ' ' and at Mays Point ; usually abundant where it appears. 



ALISMACE.E. 



403. Ausma, Linn. 



971. *A. Plantago, L. var. Americanum, Gr. WaTER-PLANTain. 



(H. and C.) 



Marshes and borders of streams ; common. Jul)' 20- Aug. 

 404. Sagittaria, Linn. 



972. *S. variabilis, Englm. Arrow-head. (H. and C.) 

 All the varieties of Man. , (excepting xa.r. pubescens,) ; common. 



Jul3 T -Aug. 



973. S. variabilis, Englm. var. obtusa, Gr., is the best marked variety 

 and occurs abundantly on the Inlet Marshes and on Cayuga Marsh- 

 es and elsewhere. In the shallow water of Cayuga L. the broad- 

 leaved varieties, grow near the shore and var. hastata, and var. an- 

 gustifolia farther out. In Cayuga Marshes leaf-blades are found 

 measuring % m. broad by }i m. long. In outlet of Summit Marsh 

 (also at head of Owasco L, ) are plants with long phyllodia, 1^-2% 

 cm. broad, and hastate, floating or erect leaves. 



974. S. heterophylla, Pursh. (H. and C.) 

 Frequent near Cayuga L. Seneca R., -and on Summit Marsh. 



July-Sept. 



975. S. heterophylla, Pursh. var. elliptica, Gr. (also var. angustifolia, 

 Gr.) 



Frequent all along the low shores of Cayuga L. and outlet. 

 [S. graminea, Michx, (S. aciitifolia, Pursh,) in Dr. Thompson's Cat. 

 (1841) and Dr. Sartwell's Cat. (1844) as " ?," is probably an error.] 



