230 



Onoclea sensibilis L. 



Polypodium vulgare L. — Mattituck. 



Polystichum acrostichoides (Mx.) Schott. — Orient. 



Pteridium aquilinum (L.) Kuhn. 



Equisetaceae 

 Equisetum arvense L. ' 



'^ Lycopodiaceae 



Lycopodium complanatum L. — Rare at Greenport. 



L. inundalum L. — Rare at Southold, the var. Bigelovii Tuck. 



L. lucidulum Mx. — Rare at Greenport. 



L. obscurum L. — Rare at Greenport, the var. dendrodeum (Mx.) D. C. Eaton. 



Selaginellaceae 

 Selaginella rupestris (L.) Spring. — Rare at Orient in sandy soil, Nov., 1910 and 

 1911. 



Spermatophyta 



gymnospermae 



Pinaceae 

 Juniperus sihirica Burgsd. — Rare at Southold on sandy hills. (Juniperus nana 



Willd.) 

 J. virginiana L. — Prostrate forms also occur. 

 Picea rubens Sargent. — Rare at Orient. 

 Pinus rigida Mill. 



ANGIOSPERMAE 



MONOCOTYLEDONES 



Typhaceae 

 Typha angustifolia L. 

 T. latifolia L. 



Sparganiaceae 



Sparganium americanum Nutt. — Rare at Greenport in a stream. 



5. androcladon (Engelm.) Morong — Greenport. 



£■. diversifoUum Graeb. — Rare at Southold, 8 Aug., 1910. 



5. eurycarpum Engelm. — Rare on Gardiner's Island. 



Zannichelliaceae 

 Potamogeton Oakesianus Robbins — Greenport and Southold in'ponds. 

 P. pusillus L. — Greenport in a shallow pond. 

 Ruppia maritima L. — Salt-water ponds and creeks. 



Zosteraceae 

 Zostera marina L. 



Scheuchzeriaceae 



Triglochin maritima L. — Salt marshes. 



Alismaceae 

 Alisma subcordatum Raf. — (Formerly confused with AlismaPlantago-aquatica L.) 

 Sagittaria latifolia Willd. — Rare and variable. 



