INDEX. . 55 



Pag.;. 



Cotton, Niam Niam, relation to Egyptian 21 



" okra " varieties 17, 20, 31, 35, 36 



Park's Own, an "okra " variety 17, 20 



Ratteree's Favorite 21, 36, 52 



relation to environment. See Environment. 



yea Island, tendency toward simple leaves 18 



Siamese, introduction into Louisiana 29 



terminology of dimorphic specializations 39-40, 44-45 



Triumph, variation 17-18, 22, 33, 34 



Upland, features of dimorphism 1 1, 14, 17, 18-22, 25, 26, 28-31, 33, 35-36 



wild, in Florida 31 



Willet's Red Leaf, lobing of leaves 14 



Cotyledons, branches from nodes 19 



See also Seedlings. 



Deccan hemp. See Hibiscus cannabinus. 



Determination of characters in plants and animals 46 



De Vries, H., on bud variation 33, 42, 47 



Dewey, L. H., on specimen of cotton hybrid 30 



Dichogeny, application of term 33, 42-43, 45 



Dimorphism, application of technical terms 39-40, 44^5 



as alternative expression 8-11, 51 



contrast with dichogeny 43 



degrees of specialization 10 



freedom from law of regression 35 



parallel leaf forms in cotton 17-19 



relation to Mendelian inheritance 36-38 



See also Mendelism. 



mutation 32-36, 51 



sexual differentiation 35, 45-50, 51 



significance in breeding 7, 51 



See also Heredity. 



types 20-22, 38-45, 52 



Doyle, C. B., on occurrence of "Culluche " cotton 31-32 



Egypt, field of observations in dimorphism 11, 15, 16, 24, 25, 26 



English ivy. See Ivy, English. 



Environment, importance of resulting changes 7, 51 



law of influence 49 



modifying dimorphic characters 34, 42^3 



Eucalyptus, example of heteroblasty 45, 47 



Expression, alternative, relation to dmiorphism 8-11, 51 



mendelism. See Mendelism. 



changes caused by external conditions 7, 33 



See also Environment. 



changes caused by mutation 33 



distinguished from transmission 8-9, 38, 51 



essentially variable 9, 28 



generally alte^nati^'e 49 



incomplete changes 48 



in cotton hybrids 35-36 



Mendeloid, in hybrids 37 



See also Mendelism. 

 221 



