Mar. 



Development of Vanilla Fruits 



247 



In the tables the measurements of girth, are given in sixteenths of an 

 inch expressed as integers for readier comparison. The comparative 

 relation of the two girths is indicated by the symbol between them. 

 " P " indicates V. planijolia. " V." indicates species of Vanilla of vanillon 

 type, the accompanying numeral specifying the particular variety. V 

 13 is a Guadeloupe variety, V 34, V 43, V 51, and V 52 are from Panama, 

 and V 62 is from Mexico. 



Table I shows that the typical fruit of V. planifolia is considerably 

 greater in girth at i inch from the blossom end than at i X inches from the 

 stem end. This difference amounted to 22.4 per cent in these fruits. 

 They had been selected to compare in length with the crosses. One 

 hundred tmselected fruits which averaged somewhat smaller than these 

 gave the same relative difference of 19 per cent, 93 showing a greater 

 apical girth, with 7 having the two girths equal. The latter is true 

 chiefly in short, poorly developed fruits. These measurements show that 

 the typical, well-developed fruit tapers considerably more at the stem end 

 than at the blossom end. 



Table II shows the diametrically opposite development where V. plani- 

 folia has been fertilized by vanillon pollen. The fruits which developed 

 from the crossed flowers tapered at the blossom end and were well filled 

 at the stem end. The girth at i}i inches from the stem end measured 

 25.1 per cent greater than that at i inch from the blossom end. 



Table II. — Comparison of the girth ineasuremenii of the fruit of Vanilla planifolia 9 X 



vanillon S 



V52. 

 V34- 

 V34. 

 V52. 

 V52. 

 V34. 

 VS2- 

 V52. 

 V62. 

 V62. 

 V 52. 



V34. 

 V52. 

 V52. 

 V52. 



V52. 



Vs2. 



V52. 

 V52. 

 V52. 



v <? 



Total. .. . 

 Average . 



Length 



of fniit 



in inches. 



6K 

 6^ 



7 

 7 



H 



1% 



IV. 

 rA 

 I'A 



8 



8 



8X 

 2>A 



SH 



8K 

 9 



9A 

 9H 



Girth in 



sixteenths 



of an inch 



at i}^ inches 



from stem 



end. 



26 

 27 

 24 

 26 

 26 

 26 

 26 

 28 

 28 

 29 



30 

 27 



30 

 26 



30 

 30 

 28 



30 

 32 



554 

 27.7 



Increase or 



decrease in 



circumfer- 



enceof ix)ds. 



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Girth in 

 sixteenths 

 of an inch 

 at I inch 



from 



blossom 



end. 



18 

 20 



22 

 18 

 20 

 20 

 20 

 20 

 21 

 20 

 22 

 21 

 20 



24 

 24 

 22 

 28 

 26 

 27 

 30 



443 

 22. 2 



