96 



SEPALS OF BRIJGUIERA RHEEDII BLUME. 



actually contained 11 sepals. As this was the only case of 

 such variation, out of the 1,284 sepals examined, the ratio 

 of fusion or gamosepaly to the free condition or polysepaly 

 is 1:623. 



ui 



3(. 



tl^ 



II 



1 



10 



II 



II 



No of sepa-ls 



Text-fig. 10.- — ^Frequency pol3'gon of the sepals of Briigtdcra liheedii Blume. 



It will be observed that — 



(a) The frequency polygon is uniniodal (see text-fig. 10). 



(6) The theoretical mode is 10.471 ; that is, the actual 



mode is 10. 

 (c) The co-efficient of variability, 2.84, is a low value, 



as usually this constant ranges from 10-20. 



BIBLIOGRAPHY. 

 Davenport, C. B. "Statistical Methods," 1904. 

 Johnston', T. H. " Ecological notes on the Littoral Fauna and 



Flora of Caloundra, Queensland." Queensland Naturalist, April 



1917, pp. 53-63. 

 Pearson, K. Biomctrika, v. I., 1901, pp. 280-1. 



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