WALLER I FLORA OF STRENSALL AND DISTRICT. 141 



[Pinus sylvestris L. Planted]. 



Auacharis alsinastrum Bab. 



Butomus umbellatus L. In the Foss. 



Alisma plantago aquatica L. A. ranunculoides L. 



Sagittaria sagittifolia L. In the Foss. 



Triglochin palustre L. Potamogeton natans L. 



Potamogeton lucens L. Abundant in the Foss. 



Potamogeton crispus L. P. densus L. 



Potamogeton pusillus L. Plentiful in the Foss. 



Potamogeton pectinatus L. 



Potamogeton heterophyllus Schreb. In the Foss. 



Epipactis latifolia All. In a small plantation near the Malton 



Road. 

 Listera ovata Br. 



Listera cordata Br. Very scarce. At Stockton Forest. 

 Orchis morio L. 0. latifolia L. 0. maculata L. 0. mascula L. 

 Gymnadenia conopsea Br. Near Towthorpe Common. 

 Habenaria chlorantha Bab. On Strensall and Towthorpe Commons. 

 Habenaria bifolia Bab. On Strensall and Towthorpe Commons. 



Occurs more frequently than H. chlorantha. 

 Habenaria viridis Br. In a lane leading from Strensall Common 



to the Malton Road. 

 Iris pseudacorus L. 



Endymion nutans Dmrt. ( = Scilla nutans Sm.). 



Narthecium ossifragum Huds. Juncus conglomeratus L. 



Juncus effusus L. J. glaucus Ehrh. 



J. sylvaticus Reich. ( = Juncus acutiflorus Ehrh.). 



J. lamprocarpus Ehrh. Juncus squamosus L. J. bufonius L. 



[Luzula congesta Lej. Is reported from Sandburn Woods and 



Strensall. I have not seen it at either locality, nor has 



Mr. Ibbotson]. 

 Luzula campestris DC. 



Luzula vernalis DC. ( = L. pilosa W.) At Sandburn, and also by 



ditch sides on Strensall Common, near Hazel Bush. 

 Arum maculatum L. 



Lemna polyrhiza L. At Stockton Forest ; in the Foss. 

 Lemna trisulca L. L. minor L. 

 Lemna gibba L. In the Foss. 

 Typha latifolia L. 



Typha angustifolia L. In some brick ponds at Strensall. 



Sparganium ramosum Huds. S. simplex Huds. 



Sparganium minimum Fr. Very scarce. In a pond at Strensall. 



May 1886. 



