BOTANICAL REPORT — isys. 21 



Zannichellia palustris Z.=brachystemon. Monk Fryston. 



Triglochin maritimum Z. Brough. 



Paris quadrifolia L. Bolton Woods and Feizor. 



Biysmus compressus Panz. Malham. 



Scirpus maritimus L. Brough. 



Carex laevigata Sm. Wharncliffe. 



C. vesicaria Z. Staddlethorpe. 



C. ampullacea Good. Malham Tarn. 



Sesleria caerulea Scop. Bolton Woods, Malham and Settle. 



Koeleria cristata Pers. Settle. 



Sclerochloa rigida Z////'. Brough and Monk Fryston. 



Brachypodium pinnatum Beauv. Wentbridge, Settle and 

 Hambleton. 



Asplenium viride Huds. Settle and Malham. 



Cystopteris fragilis Bench. Malham and Settle. 



Nephrodium rigidum Desv. Settle. 



DENIZENS AND ALIENS OBSERVED. 



Of plants of doubtful indigenousness the following have been 

 observed at our meetings, those well established if not native 

 being distinguished as " denizens," those evidently introduced but 

 showing some amount of persistence as " aliens," and stray weeds 

 springing up from chance scattered seeds as " casuals." 



Clematis Vitalba Z. (alien or denizen). Monk Fryston, 



Helleborus fcetidus Z. (denizen). KirkSmeaton. 



Aconitum Napellus Z. (alien). Farnley and Hambleton. 



Meconopsis cambrica Vig. (denizen). Feizor. 



Sinapis nigra Z. (casual). Staddlethorpe, on railway ballast. 



Erysimum orientale Brown (casual). Staddlethorpe, on 

 railway ballast. 



Hesperis matronal is Z. (denizen). Bolton Woods. 



