INDEX 



Indian pipe, mycorhiza, 702. 



India rubber tree, roots, 502; stoma, 558. 



Indusium, 815. 



Infection thread, 787, 788. 



Inflorescence, 628, 825, 827, 829, 833, 834, 



835, 837, 846, 865, 871. 872, 874, 875. 

 Infolded leaves, 581. 

 Inherent factors, 486; rhythm, 737. 

 Inheritance of acquired characters, 947. 

 Insect galls, 782, 783, 784; pollination, 



838, 839, 840, 841, 842, 847, 850, 857. 

 Insectivorous plants, 616, 617, 618, 619. 

 Instinct, 849. 

 Integument, 905. 

 Interfascicular cambium, 684. 

 Internal factors, 486. 

 Internal glands, 623, 624, 723, 724. 

 Internode, 489. 

 Intine, 831. 

 Introrse anthers, 851. 

 Intumescence, 633. 

 Inula; inulin, 914. 

 Involucre, 642, 827, 846, 872, 921. 

 Involute leaves, 581; vernation, 937. 

 Ipomoea, roots, 500. 

 Isoetes, chloroplasts, 524. 

 Isogamy, 816, 817. 

 Ivy, Japan, leaf variation, 605; leaves, 



544; tendrils, 652. 



Juncus, diaphragms, 552; mechanical 

 cylinder, 699; rhizome, 670, 674; rhi- 

 zome section, 703. 



Juniper; Juniperus, habit, 672; shoot, 

 582. 



Jussiaea, aerenchyma, 553; cork, 705; 

 roots, 508. 



Juvenile stages, 596, 601, 725. 



Key fruit, 921. 



Knees, cypress, 507, 508, 509. 

 Knot, black, 784. 

 Krummholz, 731, 732. 



Labiate flowers, 829, 846, 853, 875. 



Labrador tea, leaves, 578. 



Lactuca, achene, 921; conductive vessels, 



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



leaves, 547; root hairs, 493, 

 Lacunae; lacunar tissue, 530, 534, 552, 



553, 56i. 



Lagenaria, sieve plates, 68 i. 

 Laminae, maxillary, 841. 

 Lamium, palisade cells, 538. 

 Land plants, leaf absorption, 610; leaf 



variation, 598, 599, 600, 601, 602, 603, 



604, 605, 606, 607, 608. 

 Laportea, stinging hairs, 577. 

 Larrea, roots, 506. 



Larval chamber, 782. 



Lateral branches, 647; buds, 646, 736. 



Latex, 720, 722; sac, 720; tubes, 727. 



Lathyrus, stipules, 641; tendrils, 640. 



Laticiferous vessel, 721. 



Layer, separation, 709. 



Leaf, 488, 489, 521; absorption, 608, 609, 

 613, 616; absorptive hairs, 613, 615, 617; 

 air, 590, 592, 593, 595: air spaces, 534, 

 55i, 552, 553, 554, 557, 561, 688; al- 

 bescence, 523, 524, 536; anisophylly, 

 608; anthocyan, 528, 529; asymmetry, 

 607; carnivorous, 617, 618, 619; chloren- 

 chyma, 530, 531, 532, 533, 534, 535, 536, 

 538, 567, 581, 629, 630, 631, 632, 688, 

 724; chlorophyll, 521, 523 ; chloroplasts, 

 521, 524, 531, 533, 534, 538, 688; com- 

 pound, 546, 550, 652, 676, 783; conduc- 

 tive tissues, 530, 531, 533, 534, 536, 630, 

 638, 639; correlation, 509; crystals, 625 ; 

 cuticle, 532, 535, 558, 567, 568, 569, 570, 

 639; epidermis, 530, 531, 532, 533, 534, 



535, 536, 567, 568, 570, 571, 632, 688, 

 724; evergreen, 585; excretion, 620, 

 622; -fall, 582, 583, 585, 586; food ab- 

 sorption, 616; food accumulation, 627; 

 food manufacture, 521, 525, 528; galls, 

 781; gas exchanges, 551; glandular 

 hairs, 617, 622, 623, 625 ; hairs, 536, 572, 

 573, 574, 575, 57$, 577, 578; hori- 

 zontal, 539, 540; hydathodes, 620, 621, 

 622; internal glands, 623, 624; intumes- 

 cences, 633; involute, 581 , lacunae, 552, 

 561 ; light, 501, 539, 540, 541, 542, 543, 

 544, 546, 547, 548, 549, 55O, 603, 607, 647; 

 mechanical tissue, 639; mosaic, 543, 544, 

 607; motile, 579, 580, 582; orientation, 

 540, 541, 542, 543, 544, 547, 548; pali- 

 sade cells, 530, 532, 533, 534, 535, 536, 

 538, 561, 567, 574, 630, 639, 642; petiole, 

 507, 540, 541, 542, 640, 641; phototro- 

 pism, 539, 540, 542, 544, 546, 547,' 

 phyllotaxy, 510, 542, 543, 549, 641, 647; 

 pigments, 522, 528; plasticity, 596; 

 position, 549; protection, 565, 588; pro- 

 tective hairs, 536, 572, 573, 574, 575, 576, 



577, 578; regeneration, 636, 637; repro- 

 duction, 636, 637; roots, 504, 637; run- 

 off, 636; scale, 641, 642, 643, 644, 669, 

 670, 675, 733, 736, 768, 834; scar. 583, - 

 644, 657, 660, 708, 736; sclerophyll, 570, 



578, 588; secretion, 620, 622, 858; sec- 

 tion, 521, 530, 531, 532, 533, 534, 535, 



536, 561, 567, 574, 581, 612, 629, 630, 

 631, 632, 639, 642, 688, 724; sinus, 637, 

 639; small, 550; spines, 604; sponge 

 tissue, 530, 533, 534, 535, 536; stem 

 display, 542, 543, 546, 548, 645, 646, 650 ; 

 stipules 640, 641; stomata, 530, 531, 534, 



