378 Karl M. Wiegand and Arthur J. Eames 



a. Stems, exclusive of the long erect peduncle, very short, submerged in the mud ; 

 some leaves capillary, divided, root-like, and bladder-bearing, others subulate, 

 undivided, green, and grass-like; flowers large and showy; spur long and sharp. 



5. U. cornnta 



1. U. vulgaris L., var. americana Gray. (17. vulgaris of Cayuga Fl. U. macro- 



rhiza Le Conte.) Great Bladderwort. 



Floating in the stagnant waters -of pools and bayous, in neutral or acid waters 

 containing much organic matter; frequent. July 15-Aug. 



Various places in the Inlet Marshes (D. !) ; Myers Point; pools between railroad 

 and cliffs n. of Ludlowville, and n. of King Ferry (D. !) ; Taughannock Point; 

 marsh n. of Union Springs (D.\) ; Black Lake and Cayuga Marshes (D.) ; Junius 

 peat bogs ; swale s. of Conquest. 



Lab. to Minn, and Alaska, southw. to Md., Okla., Ariz., Lower Calif., and Mex., 

 including the Atlantic Coastal Plain. Found also in Eurasia. 



2. U. intermedia Hayne. 



Creeping in shallow water among sedges, in more or less calcareous places ; 

 scarce. July-Aug. 10. 



Summit Marsh (D.) ; Dryden Lake (D.\) ; Black Lake (D.) ; Junius marl 

 ponds ; sedgy meadows, Westbury Bog. 



Newf. to B. C, southw. to N. J., Ind„ Iowa, and Calif., including the Atlantic 

 Coastal Plain. Found also in Eu. 



3. U. minor L. 



Floating in stagnant water among reeds and sedges, mostly in calcareous situa- 

 tions; rare. "May-July" (Gray's Man., ed. 7). 



Summit Marsh (£>.!) ; Black Lake (D.) ; in a sedgy meadow, Westbury Bog. 



Newf. to B. C, southw. to Conn., w. N. Y., the Great Lakes, Utah, and Calif., in 

 both acid and alkaline waters. 



In the Cayuga Lake Basin, U. minor is not confined to shallow water, as is some- 

 times stated, being often found floating where the water is deep. It has not yet been 

 found here in flower. A form with coarser foliage, but not referable to any other 

 species, occurs at Lowery and Newton Ponds. 



4. U. gibba L. 



Creeping in open, very shallow, water, on sedgy marl flats ; rare. Aug.-Sept. 10. 

 E. side of Lowery Ponds, 1916 (F. P. Mr teal f & K. M. IV.), abundant in 1922. 

 Me. and N. S. to Fla., Ala., and Tex., near the coast ; and from w. Vt. to Mich, 

 md 111. 



5. U. cornuta Michx. 



Peat bogs, in muddy openings in the sphagnum; rare. July 15-Aug. 



Junius peat bogs (Sartzvell, D. !). 



Newf. to Minn., southw. to Fla. and Tex., including the Coastal Plain. 



115. ACANTHACEAE (Acanthus Family) 

 1. Dianthera (Gronov.) L. 

 1. D. americana L. Water Willow. 



Lake shores, and borders of the larger marshes in waters containing traces of 

 lime or salt; scarce. July-Au^. 



Confined to the Ontario plain: Farley Point (D. !) and vicinity; Cayuga to 

 Montezuma, along the river (D. !) ; salt region n. e. of Montezuma village; Duck 

 Lake. 



W. Ont. and Vt. to Wis., southw. to Ga. and Tex. ; rare or absent on the Coastal 

 Plain. 



