T94 



STUDIES IN SEEDS AND FRUITS 



Table illustrating the Effect of Hairs on the proportional 

 Weight of the Seed-coats in Resting Seeds. 



Thespesia 

 populnea 



Ipomoea 

 pes-caprse 



Ipomcea 

 tuba 



Hibiscus 

 elatus 



Ipomoea * 

 peltata 



Calotropis 

 procera 



Gossypium t 

 barbadense 



Gossypium t 

 hirsutum (?) 



Character and 



extent of 



the covering 



of hairs. 



Villous at the 

 base and 

 angles 



Pubescent over 

 most of sur- 

 face 



Puberulous, 

 but villous at 

 the angles 



Villous down 

 over all sur- 

 face 



Pubescent, but 

 with abund- 

 ant woolly 

 hair at the 

 angles 



Terminal coma 

 with hairs i- 

 1 1 inches 

 long and 

 spread out 

 like a pappus, 

 the whole 

 easily carried 

 by winds 



Seed invested 

 with abund- 

 ant woolly 

 hair (cotton) 

 do. 



Proportion of 

 parts, taking the 



weight of the 

 entire seed as loo, 



28-5 



43*5 



47-8 



44 "4 

 40 "o 

 50*0 



28-5 



25-2 



So'6 

 52-8 

 56*0 

 44 'o 



43 "o 



Effect of the 



hairs on the 



relative weight 



of the coats. 



Percentage of 

 the seed-weight. 



With 

 hairs. 



49 4 

 47-2 

 44 'o 

 56*0 



57-0 



Without 

 hairs. 



48-6 

 457 

 417 

 53*3 



50*0 



44 '6 



* The proportional weight of the hairs was alone ascertained. 



t In Gossypium {hirsutum ?) the cotton adheres firmly to the black seed, becoming 

 dirty grey and matted next to the seed. Of the relative weight of the hairy covering 

 (43 '5 P^"^ cent.), white cotton forms 37*1 and the grey matted portion 6 "4. 



In G. barbadense the cotton easily separates from the black seed, there being no 

 adherent covering of matted hairs. 



