15S 



VARIATION IX THE FLOWKR OF JASMINU.M MALABAUICUW. 



Tiikino- tlio wliolo of the tlowors exaniiued, the folio <viiig figures sliow the 



mean and the variability * : 



Mean number of 

 lobes (or teeth) 



Standard deviation. 



Probable error of 

 standard deviation 



Coefficient of 

 variability 



Corolla Lobes, 

 7-75 



(from L789 flowers) 



0-9456 



+ 0-0085 



Calyjc Teeth, 



(from 3580 flowers) 



0'6140 



+ 000155 



12 -* 



3-52 



-){ the nunibev of 



Tlio figures 



obtained bring out a 



Lobes and Calyx Teeth in the same 



very interesting case of the 



flower, 



corrfdation of the two characters studied. In 1G69 cases tlie cal}'x teeth and 



corolhi loho?i were counted on the same flowers, and the results ai'o shown in 

 the followino- tabk\ Tliis indicates the uumber ol' flowers with any particular 

 number of calyx teeth (Ij 5, &c.) in association with the various numbers of 

 corolla lobes. Thus among the fjTG tlowers ^vhich had seven corolla lobes, 

 there were lG\vith four calyx teeth, iUG with five, 231 with six, 12 with 

 seveuj and 1 with eight : 



Xuniber 

 of 



calyx 

 teeth. 



XLiniljer of Corolhi Lobes 



('">) 



(«) 



(7) 



(8 





(9) 



(10) 



(n.) 



To till 



4 



1 



6 



16 



l.'J 



7 



1 



108 



;mo 



.>-.iO 



99 



14 



1 



•in 



87n 



') 



A-2 



) 



l>31 



;iOG 



IK) 



23 



3 



/ 



21 



i 



1 



12 



8 



5 



20 



8 



Totnl 



1 



o 



4 



155 



576 



mi 



•J 



227 



38 



4 



Mc'iin 



« » 



5-2"') 



5-24 



U-J2 



5 '47 



5r>2 



5'o8 



O'J*) 





1 m.) 



5-44 



The correlation bet;veeii the nuinhei- of the corolla lobes and number 

 of calyK tef^tli thus appears to be very slight. The coelTiciont of corre- 

 lation works out as + -1148: that is to say, there is a slight, but only a 

 slio-ht, tendency for the number of corolla lobes to increase as the number 

 of calvx teeth increases and vice versa. 



■t- 



* By Chauveuet's rule, from these data the probahility is that the number of the corolla 

 lobes mav vary normally from 4*2 to 11'3. Thus 12 is outside the limit indicated, nnd 

 mitrht perhaps be classed as abnormal. In the case of the calyx teerh by the same rule, 

 the probability is that the number may vary normally from Z"2 to 7*9. Thus none of the 

 figures recorded should be classed as abnormal, I have retained the whole of the figures 

 both for corolla lobes and calyx teeth in all my calculations. 



L 



