INDEX 



Onopordon acanthium 667, 677 



Distribution 725, 736 

 Ontario weed legislation 793 



Weeds 747, 841, 842, 843, 858 

 Oospora scabies 680 

 Orach 109-110, 789, f. 110 



Distribution 716, 74 0, 74 6, m. 110 

 Seed 433, f. .',.;.; 

 Garden, Distribution 736 

 Silvery, Distribution 74 6 

 Orange Hawkweed 502, 712, 750, 814, 



842, 846, 849 

 Orchard Grass, Distribution 715 



Seed 417, 810, 811, 813, 828, 832, 



857, f. !,11 

 See also Marsh Muhlenberg 

 Oregon Flora 694 

 Weod legislation 794 

 Weeds 747, 750 

 Organs, Essential 605, f. 605 

 Origanum 693 



Ornamental plants become weeds 712 

 Orobanche ramosa, Distribution 735 

 Orobus 693 



Orpine Family, Distribution 724 

 Orr, Ellison 745, 766 

 Orton, W. A. 833, 849, 857 

 Osborn, B. F. 768 

 Osborne, O. M. 844 

 Oscinis frit 677 



Osmorrhiza longistylis, Seed 561, f. 561 

 Ostenfeld, H. C. 753, 766, 844 

 Osteosclerids 867 

 Oswald, E. I. 833 

 Oswald, W. L. 832, 844 

 Otter Moth 677 



Ovule 618, 619-621, 624, 867, f. 620 

 Ovary 617, 867, f. 616, 618, 619 



wall as disseminating mechanism 630 

 Oxalidaceab 4, 199, 201-203, 634 

 Distribution 71S, 764 

 Seed 456-457 

 Oxalis corniculata 202-203, 787, f. 202, 

 630 

 Distribution 696, 697, 734, 741 

 Family 199, 201-203, 634 

 Distribution 724, in. 203 

 Seed 456, f. 1,51 

 Purple-flowered 199 

 sp. 618, 631, 786 

 Stricta 201-202, f. 201 

 Distribution m. 202 

 violacea 689 

 yellow 199 



Root system 645 

 Ox-eye 338-339, f. 338 



Distribution 720, hi. 339 

 Seed 4 86, f. ffi 

 Daisy 362-364, 667, 793, 794 

 Chemical composition 364 

 Distribution 727, 755, m. 361 t 

 Root system 654 

 Seed 492, f. 1,92, 688 

 Rough syn. Ox-eye 

 Ox-tongue, Bristly, Seed 49 7, f. 1,98 

 Oxybaphus nvctagineus 119-120, 787, 

 /'. 120 

 Distribution 716, m. ISO 

 Seed 53 3. f. :,.V, 

 Oxytropis lamberti 194-195, f. 195 

 Distribution hi. 195 

 Seed 454, 552, /'. \Sk, 551 

 Oyster Plant, Distribution 729, 755 

 Seed 497, f. 498 

 Vegetable syn. Oyster Plant 

 Ozonium omnivora 680 



Pacific Coast weeds 725, 750 

 Packard. W. E. 839 

 Paczoski. J. S29, 844 

 Page, C. N. 75*3 



Paige, F. W. XI, 755, 757, 761, 762, 767 

 Paint Brush sun. Orange Hawkweed 

 Painted Cup 702 



Distribution 694 

 Pale Dock 716 

 Palea f. 609 

 Palet 867 



Palisade Cell see Cell, Palisade 

 Palmer, Edward 767 

 Palmer, S. H. 746 



Pammel, L. H. 274, 581, 582, 583, 584, 

 585, 645, 745, 746, 749, 750, 751, 

 753, 759, 760, 763, 765, 766, 768, 

 774, 801, 823, 824, 825, 826, 834, 

 835, 837, 844, 850, 851, 854, 858, 

 861 

 Pampas Flora 701 



Grass 8 

 Panic Grass, Scribner's 660, 689 

 Panicum capillare 12-14, 790, f. 13, 706 

 Distribution 690, 705, 714, 740, 844 

 Seed 410, f. 1,10 

 dichotomiflorum 14, f. 15 

 Distribution 714, m. 15 

 glabrum syn. Digitaria humifusa 

 miliaceum, Seed 411, f. ',11 

 proliferum, Seed 410, f. J/10 

 scribnerianum 688 

 sp. 511, 517 



Distrihuti'on 701 

 virgatum, Seed 410-411, f. 1,11 

 Pansy, Common, Distribution 727 



"Wild, Distribution 722 

 Panton, J. H. 836, S58 

 Papaver 539, 633 



rhoeas. Distribution 735 

 somniferum, Seed 440, 536-538, f. 

 440, 537, 538 

 Papaveraceae, Distribution 724 



Seed 440-441, 536-539 

 Papilla 617, 868 

 Pappaphorum, Distribution 701 

 Pappus 868, f. 64 

 Papua, Weeds of 733, 734 

 Papyrus 63 



Parachute as seed carrier 629, 633 

 Parenchyma 868 



Cells see Cell, Parenchyma 

 Parietal placenta f. 619 

 Parietaria pennsylvanica 72-74, 788, 



Distribution 738, m. 73 

 Paris quadrifolia, Distribution 693 

 Parish, E. O. 845 

 Parish, S. B. 725, 845 

 Porosrla dalea syn. Dalea alopecuroi- 

 des. f. 192 

 Pink 192, f. 192 



Distribution in. 193 

 Seed 550-551, f. 551 

 Parry, C. C. 74S, 751, 767 

 Parrish, C. U 831, 859 

 Parsley /'. 612 



Family sun. Carrot Family 

 Fool's 663 



Distribution 736 

 Parsley-piert 66 4 

 Parsnip 224, 788 

 Seed f. 688 

 Cow 234, f. 2Si 



Seed 562, f. 561 

 \\',i ter, l >istribution 734 

 Wild l"-'x- 2 .".(>. 794. 796, 807, 808, /'. 829 

 Distribution 688, 719, m. 280 

 Root system 648 

 Seed 461, f \62 

 Parsons, C. [* 831, 859 

 Partridge Pea, Distribution 718 

 Paspalum platvcaule, Distribution 722 



sp., Distribution 701 

 Passiflora foetida 847 



