78 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



FIo)'a, where reference is made to such a variation 

 as is here indicated, all that is said regarding it is 

 in the generic description, where these words occur ;. 

 "styles 3, rarely 2-3." It therefore occurred to nie 

 that it might be useful to ascertain the average 

 amount of this variation ; and, as a step in that 

 direction, during the end of last summer I examined 

 1000 flowers of S. mar if 'una, collected in four separate 

 l>arcels from four different places. I had intended 

 that the four j^laces, though confined to Clydesdale,, 

 should be ^videly separated ; but circumstances pre- 

 vented my carrying put that intention, and so I had 

 meantime to confine my operations to our own 

 immediate neighbourhood, purjDOsing to make more 

 extended observations as soon as I should have an 

 opportunity of doing so. My reason for taking the 

 flowers from different places was to ascertain whether 

 difference in habitat, soil, or exposure, could have 

 any influence on the amount of variation. The 

 foUoAving tables, the result of these observations,, 

 show the variation in the number of styles in the 

 1000 flowers gathered indiscriminately from the 

 different localities indicated. 



/. — fioO FloiverSy examined 27th July, 1SS3. CoUected hi Battery 

 Field (West-end), Greenock. 



No. of Flowers. Percentaoe. 



Flowers with 2 styles, 1 ... '\ \ 



I " JJq •■• ^^'^ U^ariation, 54-8 per cent.. 

 \\ 5 \\ 26 '.'.'. 10*4 J 



II.—:^oO Flowers, examined 0th August, 1883. Collected i)i Battery 

 Field (East-end), Greenocl: 



No. of Flowers. Percenlaofe. 

 Flowers with 2 styles, 2 ... '8 j 



'I " JJ^ •■ j{|. Variation, 52-8 per cent, 



r, 5 ;; 20 .'.'. wi J 



III,—:JoO Floirers, examined J')th Aiignst, 188 J. Collected beticeen 

 Cloch Lighthouse and Lunderston Bay. 

 No. of Flowers. Percentage. 



Flowers with 2 styles, 2 ... -8 i 



\ " JJII5 ••• "j';";'^' - Variation, -tt-4 per cent. 



5 „ 9 ... 3 



•oj 



