INDEX 



669 



Hypocotyl, 70, 107 

 Hypodermis, 47 



I 



Inflorescence, 94 

 Integuments, 99, 107 

 Intercalary, 



growth, 71; meristem, ii 

 Intercellular substance, 6, 6, 7 



in abscission, 75; chemistry, 10; ligni- 

 fication, 10 

 Ipomoea hatatus (sweet potato), 485 



anatomy, 491; cotyledons, 48g, 504, 

 /o/, S06; embryo, 489; fleshy root, 486, 



487, 496, 498, 499, soo; flower, 487; fruit, 

 488; hypocotyl, 489, 490; lateral roots, 

 494; latex vessels, 35, 498, soo, 507; 

 leaf, 486, jof, 509, 511, jii; leaf ontog- 

 eny, 509, iio; morphology, 485, root, 

 486, 491, 491, 492, 495^ root ontogeny, 

 492.; scales, 505, 506, /07, 509; second- 

 ary thickening, 494, 496, 497; seed, 



488, 489J seedling, 490, 490J sprout, 

 486; stem, 485, 506, 507, joS; stomata, 

 16, 17, 505, 507, 511, ///; tertiary 

 thickening of root, 495, 498; varieties, 

 485; vascular transition, 500, joi 



Ipomoea leucantha, 503 

 Ipomoea versicolor, 



vascular transition, 501, 501 

 Iridaceae, 



fruit, 103, 104 



J 



Juglandaceae, 

 ovule, 100 



K 



Karyolymph, 3 



Lactiferous cells, 35 



hactuca s a git tat a, 



vascular transition, 640 



hactuca sativa (lettuce), 62.1, 6zi, 624 



anatomy, 631; cotyledons, 641, 64}; 

 embryogeny, 619, 6^0; endodermis, 2.0, 

 638; endosperm, 631; epicotyl, tf_j/, 

 636; fertilization, 619; floral ontogeny, 

 62.5, 626; flower, 62.5, 62}; fruit, 62f, 

 631, 6}2, 6}}; hairs, 648, 650; inflo- 

 rescence, 95, 615; lactiferous ducts, 35, 

 635, 6i7, 6)8, 640, 643, 645, 649; leaves, 

 6ii, 647, 648; medullary bundles, 646; 

 megasporogenesis, 62.7; microsporo- 

 genesis, Gtj; morphology, 6ii; oil 

 ducts, 650; ovule, 62.7, 627; plastids, 

 4; pollination, 6i8; root, 6zi, 636, 

 6}6, 6}8; secondary thickening, 639; 



seed, 631, 6}2, 6}}; seedling, 634, 634; 

 shoot, 62.2.; stem, 644, 645, 64s; stomata, 

 17, 644, 647; types, 62.1; vascular 

 transition, 640, 641 

 hactuca scariola (compass plant), 62.1 

 hactuca virosa, 



medullary strands, 647 

 Lamina, 73 

 marginal growth, 81; meristems, 82.; 

 ontogeny, 81; venation, 74 

 hampsana communis, 

 oil passages, 650 

 Lateral roots, 



origin of, 51; in Pastinaca, j2 

 Latex, 35 (see also Allium, Cannabis, Ipomoea, 



and hactuca') 

 hathyrus, 



floral development, 361, 363; vascular 

 anatomy of flower, 363 

 Leaf, 



anatomy, 75; characteristics, 73; duration, 

 74; foliage, 72.; foliar buttresses, 80; 

 histogens, 79; marginal growth, 83; 

 morphology, 71; ontogeny of com- 

 pound, 83; ontogeny of simple, 77; 

 ontogeny, steps in, 83; phyllotaxy, 71; 

 primordium, 80; types, 71; venation, 

 74 (see also under specific plant name) 

 Legume, 103, 104, 104 

 Leguminosae, 309, 339 



carpels, 98; embryogeny, 366; flowers, 

 91; fruit, 103, /o^; roots, 39, 47 

 hens esculenta, 



vascular transition, 348 

 Lenticels, 69 



in Betula and Prunus, 69 

 Leptome, 12. 

 Lettuce (see hactuca^ 

 hevisticum officinale, 

 leaf ontogeny, 84 

 Lignin, 10 

 Ligule, 73 

 Liliaceae, 179 

 important genera, 179; lactiferous cells, 



35 



hilium, 179 



hi Hum Harris it, 



root, 2 

 Linaceae, 371 



embryogeny, 379 

 Linin, 3 



hinum angustifolium, 371 

 hinum catharticum, 



embryogeny, 379, }8o 

 hinum usitatissimum (flax), 371 



adventitious buds, 401, 403, 404, 40s; ad- 

 ventitious roots, 405, 406, 408; anat- 



