27 



LUDWIGIA, L. 



L. palustris, Ell. 



MELASTOMACE^E. 



RHEXIA, L. DEER-GRASS. 

 R. Virginica, L. Quaise, &c. 



LYTHRACE^E. 



LYTHRUM, L. 



L. Salicaria, L. PURPLE LOOSESTRIFE. 

 A few plants, in danger of extinction, near Long Pond. 



, Comm. Juss. 



N. verticillata, H. B. K. SWAMP LOOSESTRIFE. 

 Very common ; abundant on the edge of ponds and in peat 

 holes in various localities. 



CACTACEiE. 



OPUNTIA, Tourn. PRICKLY PEAR. 



0. yulgaris, Mill. 



0. Rafinesquii, Engelm. 



Both species quite abundant on Coatue, the northern limit of 



the genus on the Atlantic coast. 



CUCURBITACE/E. 



SICTOS, L. 

 S. angulatus, L. ONE-SEEDED STAR CUCUMBER. 



ECHINOCYSTIS, Torr. & Gray. 



E. lobata, Torr. & Gray. WILD BALSAM APPLE. 

 About yards ; probably introduced. 



