Species and Varieties, Their Origin by Mutation

by Hugo de Vries

I

Iberis umbellata rosea, 195
Improved races, inconstancy of 770-797
Indian cress, 668
pelorism of, 485
Indian pipe, 661
Ipecac spurge, 55
Iris, 456
falcifolis, 172
kaempferi, 174
lortetii, 521
pallida, 172
pallida abavia, 681
Isolation, 108
Ivy, 436

J

Jacob's ladder, 200, 202
Jacques, 614
Jacquin, 52, 632
Jaggi, 594, 595
Jaeger, 228, 662
Jalappa, 165
Janczewski, 266
Japanese plum, 58
Jasminum Sambac, 662
Joly, 712
Jordan, Alexis, 45, 47, 49, 50, 129
experiments with species, 37, 40
Juncus effusus spiralis, 684
Juniper, 684

K

Kapteyn, 716
Kelvin, Lord, 720, 711
Kerner von Marilaun, 266, 267
Keteleer, 618
Knight, 390, 719, 720
Koch, 433, 667
Koelreuter, 279
Korshinsky, 609, 612, 614, 617, 667
Krelage, 510, 619
Kuhn & Co., Messrs., 801, 809, 817

L

Labiates, 237
pelories of, 577
Labiatiflorae, pelorism of, 468
Labrador tea, 661
Laburnum, 270, 284, 342
oak-leaved 147, 179
pelorism of, 485
Lactuca, 52
Scariola, 456
Lagasca, Mariano, 96, 97, 114
Lamarck, 1, 447, 461, 522, 522
Lamarckism
objections to, 449
Lamium album, 237
maculatum, 237
pelorism of, 486
purpureum, 237
Larch, 804
Larkspur, 124, 192, 311, 452
hybrid, 213
white, 160
Latency, 657
individual, 219
specific, 246
systematic, 219, 220, 235
varietal, 246
Latent characters, 216
Lathyrus odoratus, 776
Laurea pinnatifida, 450
Laurel, lady's, 146
Laurent, 802
Leaves, cleft, 685
variegated, 426, 431
LeBrun, Mme., 614
Le Couteur, 96, 97, 107, 108, 114, 115, 116, 742
Ledum, 222, 661
Lemna, 222
Lemoine, 762, 762
Lettuce, 684
crisped, 158
prickly, 456
Life, struggle for, 103, 119, 120
Lilacs, 59, 769
double, 762
Lilium candidum flore pleno, 331
pardalium, 116
Lime-tree, 355, 366, 428, 669
fern-leaved, 147
Linaria, 467, 471, 480
dalmatica, 482
genistifolia, 267
italica, 267
vulgaris, 267, 471
vulgaris peloria, 464
Lindley, 63, 129, 506
Linnaeus, 32, 33, 129, 132, 256, 663
on the idea of species, 11, 13
on origin of species, 2, 34
on primroses, 52
Linum angustifolium, 80
crepitans, 81
usitatissimum, 80, 161
Link, 466
Liver-leaf, 322
Lobelia syphilitica, 161
Lonicera etrusca, 640
tartarica nana, 614
Lorenz, Chr., 482
Lothelier, 454
Lotus corniculatus, 442
corniculatus hirsutus, 139
London, 615, 616, 667
Lucerne, 264
Ludwig, 738
Lupines, 90
Lychnis, 282
chalcedonica, 161
diurna, 238, 578
preslii, 578
vespertina, 238, 281, 585
Lycium, 455
Lycopersicum, 655
grandifolium, 654
latifolium (see L. grandifolium).
solanopsis, 854, 656
validum (see L. solanopsis).
Lyell, 1, 710
Lysimachia vulgaris, 684

M

MacDougal, D.T., 62, 575, 590
Macfarlane, 56, 255, 268
Madia elegans, 779
Magnolia, 355, 366, 428, 674, 675
obovata, 355, 669
Magnus, 228
Mahonia aquifolia, 270
Maize, 134, 775
"Cuzco," 152
European, 206
"Gracillima," 152
"Horse-dent," 152
"Quarantino," 118
Mallow, 663, 684
Malva crispa, 684
Maples, laciniate, 615
Marchant, 592
Marigold, 131, 158
corn, 729
field, 503, 505, 508
garden, 503
Japanese, 490, 494, 495
Marsh-marigold, 331
Martinet, 80
Measart, 434
Masters, 228, 370, 372
Matricaria Chamomilla, 130
Chamomilla discoidea, 156
Matricaria discoidea, D.C., 157
May-thorn, red, 196
Medicago media, 264
falcata, 264
Melanium, 39
Melons, 118
Mendel, 6, 210, 294, 296, 306, 308
Mendel's law, 276, 293, 294, 298, 299, 300, 301,
307, 612, 613, 616, 716
Mendelism, 307
Mentha, 52
Mercurialis annua, 420
annua laciniata, 592
Mercury, 420, 422, 425, 820
Methods of investigation, 21
Metzger, 205, 206
Milde, 38
Milfoil, 441
Millardet, 266
Miller, 611
Millet, 105
Mimulus, 151
quinquevulnerus, 725
Mimusops, 697
Miocene period, 698
Miquel, 83
Mirabilis, 241
Jalappa, 322
Mirbel, 615
Monardella macrantha, 444
Monstrosities, 400, 401, 445, 446, 447
Monkey-flower, 725
Monocotyledons
ancestry of, 1, 5
regression in, 630
Monotropa, 222, 661
Morphologic units, 145, 152
Monstrosities, 818
Morgan
on mutation-theory, 9
Morren, 244, 762
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 comosam, 134
Museum d'Histoire Naturelle, Paris, 522
Mutability vs. fluctuating variability, 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, 702
peloric, 707
periodic, 686, 705
progressive, 704
retrograde, 704
stray, 704, 705, 706
synonyms of, 191
Mutation-period, 714
Myosotis azorica, 368
Myrtus communis, 684