MENYANTHACEAE 507 



i. B. virginica (L.) B. S. P. In moist soil: Newf. to Fla., Mich, 

 and La. 



Throughout the range, less conspicuous than uncommon. 



2. B. paniculata (Michx.) Robinson. (B. iodandra of Britton's 

 Manual, in part, not of Robinson; B. lanceolata Small.) In 

 wet sandy woods and swamps: Eastern Mass. to Fla. and La. 

 Conn. Rare and local over the southern part of the state. 

 N. Y. Rare on the L. I. coastal plain and at Smithtown. 

 N. J. The coastal plain, there rare and local near the edges, most 

 common near the coast ; unknown elsewhere. 

 A rare and local species whose distribution is not well understood. 



M EN YANTHACEAE 



Leaves 3-foliolate; swamp plant. I. Menyanthes. 



Leaves simple, entire, cordate; floating. 2. Nymphoides. 



i. Menyanthes [Tourn.] L. 

 1. M. trifoliata L. In bogs: Greenl. to Alask., L. I., Pa., W. Va., 

 Neb. and Cal. Also in Europe and Asia. 

 Conn. Throughout the state, increasing northwestward. 

 N. Y. On L. I. and S. I., unknown in the Bronx, increasing 



northward. 

 N.J. Very rare in Cape May and Gloucester counties,* formerly 



in Camden Co., apparently wanting between these stations and 



Hudson and Bergen counties, thence increasing and locally 



common northwestward. 

 Pa. Apparently confined to Monroe, Berks and Bucks counties. 



Tertiary, unknown on Beacon Hill, rare elsewhere:* Cretaceous, 

 very rare: Older Formations, increasing northward, especially in 

 the glaciated area. 117-220 days. Sea level-3,980 ft. 



2. Nymphoides Hill (Limnanthemum S. G. Gmel.).f 



Floating leaves 2-5 cm. long; flowers 6-12 mm. broad, yellow; seeds 



smooth. 1. N. lacunosum. 



Floating leaves 5-15 cm. long; flowers 12-20 mm. broad, white; seeds 

 rough. 2. N. aquaticum. 



I. N. lacunosum (Vent.) Kuntze. In ponds: N. S. to Fla., Ont., 

 Minn, and L. 



Throughout the area, nowhere very common and locally want- 

 ing; more frequent in the pine-barrens than elsewhere. 



* See Introduction paragraph 33. The Cape May Co. records are the most southerly 

 in the east except for one in W. Va. See Rhodora 12: 11. 1910. 

 t See footnote, page 76. 



