Euphorbia CALLITRICHAC— ANACARDIACEAE Rhus 



nail, 30 Oct. 1897 (D). Adv. from Europe, probably on ship's 

 ballast. 



E. Lathyrus L. Caper Spurge. 



Infrequent escape from cultivation in the northern counties. 

 Introd. from Europe. 



E. falcata L. 



One collection: on ballast of abandoned railroad at east end of 

 Vienna bridge, 2^ mi. w. of Mardela Springs (Wi), R. R. Tatnall, 

 4580, 2 Aug. 1940 (T, A). Adv. from Europe. 



CALLITRICHACEAE (Water Starwort Family) 



Callitriche L. Water Starwort. 



C. Austin! Engelm. (C. deflexa A. Br. var. Austini (Engelm.) 

 Hegelm.) 



Infrequent in shaded muddy places. Piedmont and Coastal 

 Plain in the northern portion. Frt. June. 



C. palustris L. 



Infrequent, in shallow water, Piedmont of New Castle County, 

 and southward on the Coastal Plain to northern Accomac County. 

 Frt. late May, early June. 



C. heterophylla Pursh. 



Common in ponds, ditches and slow streams, throughout the 

 Peninsula. Frt. mid-April through July. 



LIMNANTHACEAE (False Mermaid Family) 

 Floerkea Willd. False Mermaid. 



F. proserpinacoides Willd. 



Common in moist alluvial soil, northern New Castle and Cecil 

 Counties. Early May. 



ANACARDIACEAE (Cashew Family) 



Rhus L. Sumac. 



R. typhina L. {R. hirta (L.) Sudw.) Staghorn Sumac. 



Infrequent, in dry soil. New Castle and Cecil Counties; less 

 common farther south: 2 mi. n. e. of Longwoods (Ta), R. R. 



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