INDEX 



535, 536, 555, 556, 558, 559, 560, 561, 

 562 ; subterranean, 642 ; teeth, 621 ; ten- 

 drils, 640, 641; transpiration, 565, 577, 

 578, 588; variation, 544, 575, 589, 590, 

 592, 593, 594, 595, 597, 598, 599, 600, 601, 



602, 603, 604, 605, 606, 607, 608, 673, 

 726; 727, 731, 741, 784; veins, 638, 

 639; vertical, 546, 547, 549, 578; water, 

 590,592, 5Q3, 595, 837 ; water accumula- 

 tion, 627, 628, 629, 630, 631, 632, 633; 

 water exudation, 620, 622; water tissue, 

 533, 629, 630, 631, 632, 635. 



Leafless stem, 664, 665, 725, 733, 740; tree, 

 710, 711. 



Leaflet, 579, 640, 652, 783. 



Leaner, 654. 



Ledum, leaves, 57$. 



Legume, 920. 



Leguminosae, root tubercles, 787, 788, 790. 



Lenticel, 660, 661, 662, 663, 736; water, 

 663. 



Leonurus, leaf variation, 606. 



Lepidium, leaf section, 530; roots, 498; 

 rosette, 582. 



Leptocentric bundle, 683. 



Leptome, 530, 630, 639, 682, 683, 689. 



Lettuce, achene, 921; conductive vessels, 

 679; latex tubes, 721 ; leaf section, 535; 

 leaves, 547; root hairs, 493. 



Leucobryum, leaf section, 612. 



Leucoplast, 528, 721. 



Level, law of, 668, 670. 



Lianas, 657, 652, 653, 654, 655, 656; con- 

 ductive tissue, 689; mechanical tissue, 

 703; roots, 512, 513. 



Libriform, 697. 



Lichens, absorption, 610, 61 1, 615 ; chloren- 

 chyma, 533; epiphytism, 659; protec- 

 tion, 588; rhizoids, 520; symbiosis, 800, 

 801, 802; vegetative reproduction, 806. 



Lid, 814. 



Light, carbohydrate synthesis, 526 ; chloro- 

 phyll, 523; elongation, 726 ; flower color, 

 898 ; leaf form, 594, 599 ; leaf position, 



603, 607; leaves, 501, 539, 540, 547, 542, 

 54 3, 544, 546, 547, 548, 549, 55, 647; 

 palisade cells, 535 ; stomata, 563. 



Lignification ; lignin, 679, 693. 



Ligustrum, lenticel, 661. 



Lilium; lily, bulbils, 675; leaf section, 

 532; stoma, 555. 



Linear migration, 669, 670, 677. 



Lip, 829, 846. 



Lithophyte, 659. 



Liverworts, chlorenchyma, 533, 557; con- 

 ductive tissue, 685 ; gemmae, 808; rhi- 

 zoids, 516, 517. 



Locust, honey, 777. 



Longevity of seeds, 908. 



Long moss, 614. 



Lonicera, leaves, 543. 



Loosestrife, leaf section, 642; leaves, 641. 



Lopseed, flowering shoot, #75. 



Lunularia, gemmae, 808; rhizoids, 517. 



Lupine ; Lupinus, pod, 920. 



Lycopodium, tuber, 746. 



Lysimachia, leaf section, 642 ; leaves, 641. 



Maize, roots, 494, 499, 514. 



Man, 946. 



Mangrove, roots, 575; vivipary, 930, 931. 



Mantle, water, 553, 631, 632. 



Maple, fruit, 921; gall, 782; habit, 5<?4; 

 leaves, 542; scale hairs, 572 ; twigs, 646. 



Marchantia, gemmae, 808; rhizoids, 517; 

 thallus section, 557. 



Margo, 681. 



Maritime associations, 942. 



Marshes, salt, 942. 



Marsilea, reproductive variation, 885. 



Maturity, period of, 690. 



Maxillary laminae, 841. 



Meadow fescue, flowers, 835. 



Mechanical tissues, 573, 5<?7, 639, 696, 697, 

 698, 699, 700, 707, 702, 703, 705. 



Medullary ray, 684, 685. 



Megaspore, 815, 826. 



Melilotus, root tubercles, 788. 



Memory, 849. 



Mermaid weed, leaf sections, 534; leaf 

 variation, 592, 593, 595. 



Mesophyll, 521, 642, 688. 



Mesophytes, 486, 939, 945 ; chlorenchyma, 

 53, S3 1 , 534! congenital, 951 ; faculta- 

 tive, 951; forest, 656; leaf sections, 

 530, 598; obligate, 951; reaction, 951. 



Mestome, 682, 683. 



Meteorological factors, 887. 



Micellae, 697. 



Micropyle, 832, 905. 



Microspore, 815, 825, 826, 830. 



Midrib. 638. 



Migration, 927; linear, 669, 670, 671; 

 radial, 669, 672. 



Milfoil, water, stem section, 557. 



Mimosa, leaves, 579. 



Mint, mountain, stem section, 702. 



Mistletoe, 777. 



Mixophyte, 754. 



Mobility, 927. 



Moisture and stomatal movement, 563. 



Mold, habit, 755; sporangium, Si I. 



Monocarpic plants, 886. 



Monocliny, #25, 826, 827, 828, 835, 838. 



Monocotyls, chlorenchyma, 530, 537 ; seed- 

 lings, 935; stomata, 560 (see also Seed 

 plants). 



Monoecious plants, 818, 827, 834. 



