6oo REPORT OF NEW JERSEY STATE MUSEUM. 



Fl. — Mid- July to mid- August. Fr. — Late September into Oc- 

 tober. 



Middle District. — Crosswicks, Lindenwold (S), Mickleton, Swedesboro, 

 Fairton,. 

 Cape Ma.v.— Bennett, Cold Spring (OHB). 



OXYPOLIS Rafinesque. 



Oxypolis rigidior (L.). Cowbane. 



Sium rigidius Linnaeus, Sp. PL 251. 1753 [Virginia]. 

 Oenanthe rigidius Barton, Fl. Phila. I. 142. 1818. 

 Archemora rigida Knieskern 16. 

 Tiedmannia rigida Britten 118. 



Common in swamps throughout the Middle, Coast and Cape 

 May districts north to Bergen, Middlesex and Mercer Counties; 

 rare in the Pine Barrens. 



Fl. — Mid-August to late September. Fr. — Mid-September to 

 late October. 



Middle District. — New Egypt, Burlington, Brown's Mills, Medford (S), 

 Ashland, Haddonfield, Camden, Tomlin, Swedesboro. 



Pine Barrens. — Landisville (T). 



Coast Strip. — Toms River, Forked River, Waretown, Manahawkin, West 

 Creek, Coxe's, Barnegat, Barnegat City (L), Mouth of Batsto, Absecon (S), 

 Petersburg (S). 



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



Oxypolis rigidior longifolia Pxirsh. Slender-leaved Cowbane. 



Sium longifolium Pursh Fl. Am. Sept. 194. 1814 [New Jersey]. 

 Oenanthe ambigua Nuttall Gen. I. 190. 1818 [Banks of the Delaware near 

 Phila.].— Barton Fl. Phila. I. 143. 1818. 



Apparently restricted to swamps of the Pine Barrens. 



The distinguishing character of this form is the narrowness 

 of the leaf segments (rarely over 4-5 mm.) rather than in the 

 entire margin. They are in a majority of cases entire, it is true,, 

 but even the narrowest are sometimes lobed, while plants with 

 leaf segments 18-20 mm. wide (rigidior) have them sometimes 

 entire. 



Fl. and Fr. — Apparently similar to the preceding. 



Middle District. — Tomlinson's. 



Pine Barrens. — Toms River (C), Bamber, Quaker Bridge (C), Speedwell 

 (S), Mo. of Batsto, West Creek, Absecon (S), Hammonton (C), Petersburg 

 (S), Mays Landing (S), Woodbine. 



