INDEX 



535, 536, 555, 556, 55-?, 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, 59$, 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, 593, 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, 777. 



Leaflet, 579, 640, 652, 783. 



Leaner, 654. 



Ledum, leaves, 578. 



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, 651, 652, 653, 654, 655, 656; con- 

 ductive tissue, 689; mechanical tissue, 

 703 ; roots, 512, 513. 



Libriform, 697. 



Lichens, absorption, 610, 611, 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, 541, 542, 

 543, 544, 546, 547, 54$, 549, 55O, 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, 671. 



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, 875. 



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, 533, 631, 632. 



Maple, fruit, 921; gall, 782; habit, 584; 

 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, 581, 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, 

 530, 53i, 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, 551. 



Mimosa, leaves, 579. 



Mint, mountain, stem section, 702. 



Mistletoe, 777. 



Mixophyte, 754. 



Mobility, 927. 



Moisture and stomatal movement, 563. 



Mold, habit, 755; sporangium, Sil. 



Monocarpic plants, 886. 



Monocliny, 825, 826, 827, 828, 835, 838. 



Monocotyls, chlorenchyma, 530, 537; seed- 

 lings, 935; stomata, 560 (see also Seed 

 plants). 



Monoecious plants, 818, 827, 834. 



