PLIANTS OF SOUTHERN NEW JERSEY. 171 



Middle District. — Navesink Hills, Belmar (NY), Farmingdale, New Egypt, 

 Hartford, Delair, Camden, Westville, Washington Park, Albion, Jumbo. 

 Coast Strip. — Weymouth (T), Mays Landing. 



Sagittaria iongirostra (Micheli). Long-beaked Arrowhead. 



Sagittaria sagittifolia (?) Iongirostra Micheli, in D. C. Monog. Phan. 3. 69. 



1881. [Alabama]. 

 Sagittaria Bngelmanniana J. G. Smith, Ext. fr. 6th Ann. Rep. Mo. Bot. Gard. 



15. 1894 (iri part). — Keller and Brown 25. — Mackenzie, Torreya IX. 



30. 1909. 

 Sagittaria sagittwfolia formge angustifolia et gracilis Britton 255. 

 Sagittaria Iongirostra Mackenzie, Torreya IX. 30. 1909. 



Abundant on the edges of streams, bogs, etc., in the Pine 

 Barrens and Cape May districts. 



Fl. — Late June to late September. Fr. — Very rarely fully 

 mature before late September. 



Pine Barrens. — Lakehurst, Toms River, Brown's Mills (NB), Hanover, 

 Forked River, Dover Forge, New Egypt, Pasadena, Hammonton, Parkdale, 

 Quaker Bridge (NB), Mullica River (NB), Pleasant Mills (NB), Pancoast, 

 Weymouth (T).* 



Cape May. — Cape May. 



The common Arrowhead of the Pine Barrens shows quite as 

 much variation in leaf form as does the Sagittaria latifolia of 

 the Delaware River and its tributaries, both varying from nar- 

 rowly linear to broadly hastate, though the present species seems 

 to exhibit the slender type of leaf more frequently. In fruit the 

 two species are readily distinguis'hed by the beak of the achene, 

 which is erect in this form and horizontal in S. latifolia. 



The narrow-leaved form of the Pine Barren plant was long 

 confused with S. engelmanniana, a more northern species distinct 

 from either of those here considered. 



Sagittaria rigida Pursh. Sessile-fruited Arrowhead. 



Sagittaria rigida Pursh, Fl. Am. Sept. 397. 1814 [Oswego river, near Great 



Falls, N. Y.]. — Keller and Brown 25. 

 Sagittaria heterophylla Wills 60. — Britton 256. 



Locally in northern New Jersey and southward along the 

 Delaware. 



* Britton records it from Sandy Hook on the authority of I. C. Martindale, 

 but I have been unable to verify the record. 



