INDEX 



147 



Hypericum, septate tiber-traeheids 



of, 77 

 HyiDocotyl, study of primary 



xylein of, 87, 88 



ICE-PLANT, water vesicles of, 54 

 Idioblasts, illustration of, 36 

 in parenchyma tissues, 38 

 Inclusions (see Ergastie sub- 

 stances), 4 

 Intercalary growth, of leaf, 123 



meristems, 18 

 Intercellular layer, structure and 

 origin of, 9 

 spaces, in collenchyma of celery, 

 64 

 in mesophyll of Stjringa, 125 

 in photosynthetic pai'en- 

 chyma of Begonia, 60 

 Interfascicular cambium, origin 

 of, 105 

 use of term, 106 

 Intussusception, method of wall- 

 thickening, 9 

 Iodine, test for starch in Pellionia, 



4 

 Iris, study of epidermis of, 49 

 Isotropic, use of term, 9 



JUGLANS. astrosclereides of, 

 70-71 



LATERAL meristems (see also 

 vascular and cork cam- 

 bium), 18 

 roots, origin and development 

 of, 132-133 

 study of origin of, 130 

 Leaf, apical growth in, 123 

 evolution of, 123 

 from anatomical standpoint, 



123 

 intercalary growth in, 123 

 origin of in grasses, 24 

 study of in Ginkgo, 128 



Leaf, study of in I'iiius, 128 

 study of in Syringa, 124-127 

 study of in Zea, 127-128 

 Leaf anatomy, material for studv 

 of, 124-128 

 gaps, nature of, 102 

 traces, origin and development 

 of, 105-106 

 relation to leaf gaps, 102 

 use of term, 102 

 Leaves, variations and tvpes of, 



123 

 Leiiina, raphides in, 5 

 Lentieels, function of, 108, 112 

 structure and development of, 

 108 

 Leucoplasts, function of, 4 

 Libriform fibers, of oak, 78 

 Lignin, in secondary wall, 10, 75- 



76 

 Lilac, guard cells of leaf, 49 



study of leaf of, 124-127 

 Linden, bast fibers of, 77-78, 113 



study of stem of, 111-117 

 Linum, multinucleate fibers of, 76- 



77 

 Liriodendron, study of vessel-ele- 

 ments of, 89 

 Lithocyst, use of term, 51 

 Lumen, occlusion of, 9 

 occlusion in fibers, 75 

 in libriform fibers, 78 

 in macrosclereides, 71 



MACERATED tissue, of bean 



cotyledon, 59 

 of bean hyiiocotyl, 88 

 of Betula, 89 

 of Cucurbita, 90 

 of fruit of Vary a and Juglans, 



70-71 

 of Liriodendron, 89 

 of Pinus, 13, 88-89 

 of Platanns, 15 

 of Quercus, 78, 89 

 of rhizome of Pteriditim, 88 



