838 



Index 



Monkey-flower, 725 

 Monocotyledons 



ancestry of, 15 



regression in, 630 

 Monotropa, 222, 661 

 Morphologic units, 145, 153 

 Monstrosities, 818 

 Morgan 



on mutation-theory, 9 

 Morren, 244, 763 

 Mountain-ash, 342 

 Muller, Fritz, 775, 776, 780 

 Multiplication, vegetative (see 



Asexual propagation ) . 

 Munting, Abraham, 164, 165, 



490, 762 

 Munting's drawings, 512 

 Murr, 158, 236 

 Muscari comosum, 134 

 Museum d'Histoire Naturelle, 



Paris, 522 

 Mutability vs. fluctuating va- 

 riability, 568 

 Mutation, 659, 674, 677, 685, 

 686, 694, 713, 716, 825 



absence of intermediate 

 steps in, 474, 480 



conditions for observing, 

 601 



decided within the seed, 28 



definition of, 7 



easily observed, 30 



experimental, 688 



few observations of, 8 



fluctuation vs., 7, 16, 719 



influence of on variability, 

 335 



iterative nature of, 476, 

 703 



laws of, 556, 558, 560, 562, 

 564, 566, 568, 570 



limited in time, 29 



observation of, 16 



in Oenothera, 521, 525, 690 



oldest known, 609 



oldest recorded, 22 



periodic, 690, 692, 694 



perodicity of, 519 



progressive, 307 



repetition of, 476 



in Saponaria calabrica, 612 



simultaneous, 614 



in tomato, 655 

 Mutations, 141, 275, 280, 445, 

 449, 573, 608, 620, 626, 

 678, 685, 686, 701, 704, 

 712, 713, 716, 800 



artificial, 402 



chance for useful, 598 



defined, 191 



frequency of, 597 



in garden-flowers, 488 



in horticulture, 604, 706 



latent, 703 



mode of appearance, 517 



numerical proportion of, 

 475 



original production of, 703 



peloric, 707 



periodic, 686, 705 



progressive, 704 



retrograde, 704 



stray, 704, 705, 706 



synonyms of, 191 

 Mutation-period, 714 

 Myosotis aeorica, 368 

 Myrtus communis, 684 



N 



Nageli, 60, 439, 443, 448, 795 

 Nagelian principle, 448, 450, 



451 

 Natural selection, 18, 119, 

 120, 445, 456, 682, 694, 

 703, 743, 744, 798-826 



basis, 604 



nature of, 6, 19 

 Naudin, 118 



Nectarines, 137, 138, 226, 627 

 N6mec, 578 

 Neo-Lamarckians 



principle of, 8 

 Neo-Lamarckism 447 

 'Nepenthes, 671, 672, 673, 674 

 Newton, 1, 732, 767 

 Nicandra, 152 

 Nigella, 134 

 Nightshade, 298 



black, 282 



