PLANTS OF SOUTHERN NEW JERSEY. 643 



Middle District. — Kaighns Swamp, Dividing Creek. 



Pine Barrens. — Forked River, Waretown, Manahawkin, Coxe's, Chats- 

 worth, Hammonton, Pleasant Mills, Petersburg (S). 

 Coast Strip. — Barnegat City (L). 

 Cape May. — Bennett, Cold Spring (S), Green Creek (S). 



Bartonia virginica (L.). Upright Bartonia. 



PI. CVIL, Fig. 2. 



Sagina virginica Linnaeus, Sp. PI. 128. 1753 [Virginia]. 

 Bartonia virginica Britton 173. — Keller and Brown 257. 

 Bartonia tenella Knieskern 25. 



Low damp ground; frequent throughout our region and ap- 

 parently also in the northern counties. 

 Fl. — Mid-July to late August. 



Middle District. — Farmingdale, New Egypt, Florence, Delanco, Kaighns 

 Pt., Medford (S), Tomlin (S), Taunton (S), Lindenwold, Mickleton, Pauls- 

 boro, Fairton (S), Beaver Dam, Dividing Creek. 



Pine Barrens. — Whitings, Jones' Mills (S), Bear Swamp, Braddock's Mill, 

 Speedwell (S), Clementon, Pleasant Mills, Egg Harbor City (S), Woodbine, 

 Tuckahoe (S). 



Coast Strip. — Pt. Pleasant, Asbury Park, Seaside Park, Spray Beach (L), 

 Peahala (L), Sherburn's (L), Manahawkin, West Creek (S), Palermo. 



Cape May. — Court House (S), Wildwood Jnc. (S), Whitesboro, Green 

 Creek (S), Cape May (S). 



OBOLARIA L. 

 Obolaria virginica L. Pennywort. 



Obolaria Virginica Linnseus, Sp. PI. 632. 1753 [Virginia]. — Britton 173. — 

 Keller and Brown 257. 



Rich woodland of the northern and Middle districts, rare 



especially within our limits, where it is know from but four 



stations. 



Fl. — Late April to late May. 



Middle District. — New Egypt, Haddonfield (C), Swedesboro, Salem (C). 



Family MENYANTHACE^. Buckbeans, etc. 

 Key to the Species. 



a. Bog plant, leaves 3-foliate, long petioled; flowers white in an erect 



raceme. Menyanthes, p. 644 



aa. Aquatic plants. Leaves oval, heart-shaped, floating on the surface of the 



water with an umbel of white flov/ers attached just beneath and coming 



up to the surface when in bloom. 



h. Flowering leaves 20-50 mm. long. Limnanthemnm lactinosum, p. 644 

 hb. Flowering leaves 50-150 mm. long. L. aquaticum, p. 645 



