10 78 



Proceedings of the Royal Irish Academy. 



Powder Seeds a>t> aIiscet.t.axea. 



Time (seconds) taken to fall 







12 feet 



40 feet 



Papayeeaceae — 



Papaver dubium, 



1-5 



4-4 



Ceucifebae — 



Erophila vulgaris, 



3-7 



— 





Sisymbrium Sophia, 



1-5 



4-6 





Capsella Bursa-pastoris, 



1-5 



5-0 





Brassica Papa var. Briggsii 



— 



2-0 



YlOLACEAE — 



Viola arvensis, 



— 



34 



Caetophtllaceae— 



- Arenaria vema, 



2-0 



— 





A. serpyllifolia, 



1-8 



6-0 





Sagina proeumbens, 



3-5 



— 



Lesmceae — 



Badiola linoides, 



4-0 



— 



Hypeeicaceae — 



Hypericum pulchrum, 



24 



6-0 





H. hirsutum, 



2-0 



6-4 



Legumixosae — 



Lathyrus pratensis, 



— 



1-2 



Saxifragaceae — 



Pamassia palustris, 



5-5 



— 



Compositae — 



Arctium minus, 



— 



2-2 





Matricaria discoidea, 



2-0 



— 



Campanclaceae — 



Jasione montana, 



2-8 



7-2 



Ericaceae — 



Dabeocia polifolia, 



2-0 



5-5 





Calluna vulgaris, 



3-2 



— 





Erica Tetralix, 



3-5 



— 





E. cinerea, 



1-5 



— 



Primulaceae — 



Samolus Yalerandi, 



2-8 



— 



Scrophtjlariaceae- 



— Yerbascum Thapsus, 



— 



5-0 





Scrophularia nodosa, 



1-6 



5-2 





Bartsia Odontites, 



r: 



54 



Orobaschaceae — 



Orobanche minor, 



7 - 5 



25-6 





0. Hederae, 



6-0 



— 



Orchidaceae — 



Epipactis palustris, 



22-0 



— 





Orchis inearnata, 



12-0 



— 





Habenaria conopsea, 



12-0 



— 



Leliaceae — 



Scilla verna, 



— 



2-5 



JUN'CACEAE — 



Juneus effusus, 



3-6 



— 





J. balticus, 



2-2 



7-0 





J. glaucus, 



2-8 



— 



Cypeeaceae — 



Carex vulpina, 



— 



4-8 





C. glauea, 



1-5 



— 





C. flava, 



— 



5-3 



Geajitjs'eae — 



Descbampsia caespitosa, 



— 



16-8 





Dactybis glomerata, 



1-5 



4-5 





Glyeeria festucaeformis, 



2-5 



— 





Bromus asper, 



— 



5-2 



