XVI. A NOTE ON THE OCCURRENCE OF TRIGLOCHIN 

 PATUSTRIS LINN.EUS IN PENNSYLVANIA. 



Bv Otto E. Jennings. 



Of the three species of Tri^j;lochin occurring in the eastern part of 

 the United States but one, Triglochin inaritima Linni'eus, is reported 

 in the late Dr. T. C. Porter's " Flora of Pennsylvania," ' but the evi- 

 dence at hand seems to indicate a confusion in the report of this 

 species with Triglocliin paliistris Linnceus. 



Tn'j^/oi-hiii inaritima Linnceus is found in Europe and Asia, and in 

 America " In salt marshes, along the Atlantic sea-board from Labrador 

 to New Jersey, and in fresh or saline marshes across the continent to 

 Alaska and California," " and so might be expected to occur in Penn- 

 sylvania, but in the Pennsylvania Herbarium of the Carnegie Museum 

 there is a sheet from the herbarium of Lafayette College and bearing 

 Dr. Porter's label, *' Tri^^locliiii paliistrc L., Presque Isle, Erie, Pa., 

 July 24, 1868, Leg. A. P. Garber." The specimens on this sheet 

 are typically Trig/ocliin paiusfris Linnaeus, as are also specimens in 

 the Pennsylvania Herbarium of the Carnegie Museum collected at 

 Presque Isle by Gustave Guttenberg, August 5, 1880. 



On August 26, 1905, the writer collected several hundreds of fine 

 fruiting specimens of Tn'g/ochin palustris Linnaeus along the sandy 

 shores of ponds at the eastern end of Presque Isle but a careful search 

 failed to discover any other species of Triglochiu and taking this fact 

 in connection with the identity of the Lafayette College specimens 

 there seems to be good grounds for assuming that Pennsylvania has 

 thus far produceil only one species of Triglochiu, viz.: Triglochiu 

 paliisiris Linnaeus. 



Carnegie Museum, 



November 21, 1 905. 



' Porter, T. C, " Flora of Pennsylvania," edited by J. K. Small, 1 903. 

 ^Britton, N. L., " Manual of the Flora of the United States and Canada," 2d. 

 edit., p. 53, 1905. 



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