INDEX 



897 



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, 740, 746, m. 110 

 Seed 433, f. iSS 

 Garden, Distribution 736 

 Silvery, Distribution 746 

 Orange Hawkweed 502, 712, 750, 814, 



842, 846, 849 

 Orchard Grass, Distribution 715 



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



857, f. Ult 

 See also Marsh Muhlenberg 

 Oregon Flora 694 

 Weed legislation 794 

 Weeds 747, 750 

 Organs, Essential 605, f. 60S 

 Origanum 693 



Omanaental 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.sei 

 Ostenfeld, H. C. 753, 766, 844 

 Osteosclerlds 867 

 Oswald, E. I. 833 

 Oswald, W. D. 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 

 OXALIDACEAE 4, 199, 201-203, 634 

 Distribution 718, 764 

 Seed 456-457 

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

 6S0 

 Distribution 696, 697, 734, 741 

 Family 199, 201-203, 634 

 Distribution 724, m. BOS 

 Seed 456, f. i57 

 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. SS8 



Distribution 720, m. 3S9 

 Seed 486, f. 486 

 Daisy 362-364, 667, 793, 794 

 Chemical composition 364 

 Distribution 727, 755, m. 36J, 

 Root system 654 

 Seefl 492, f. 492, eS8 

 Rough syn. Ox-eye 

 Ox-tongue, Bristly, Seed 497, f. 498 

 Oxybaphus nyctagineus 119-120, 787, 

 f. im 

 Distribution 716, m. i:o 

 Seed 533, f. SSI, 

 Oxytropis lamberti 194-195, f. 19S 

 Distribution m. 19S 

 Seed 454, 552, f. 4SJ,, SSI 

 Oyster Plant, Distribution 729, 755 

 Seed 497, f. 498 

 Vegetable svn. Oyster Plant 

 Ozonium omnivora 680 



Pacific Coast weeds 725, 750 

 Packard, W. E. 839 

 Paczoski, X 829, 844 

 Page, C. N. 757 



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

 Paint Brush svn. 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, 106 

 Distribution 690, 705, 714, 740, 844 

 Seed 410, f. 410 

 dichotomiflorum 14, f. IS 

 Distribution 714, m. 15 

 glahrum syn. Digitaria humdfusa 

 miliaceum, Seed 411, f. 411 

 proliferum. Seed 410, f. 410 

 scribnerianum 688 

 sp. 611, 517 



Distribution 701 

 virgatum, Seed 410-411, f. 411 

 Pansy, Common, Distribution 727 



Wild, Distribution 722 

 Panton, J. H. 836, 858 

 Papaver 539, 633 



rhoeas. Distribution 735 

 somniferum, Seed 440, 536-538, f. 

 440, SSrt, 538 

 Papavbraceab, Distribution 724 



Seed 440-441, 536-539 

 Papilla 617, 868 

 Pappaphorum, Distribution 701 

 Pappus 868, f. 64 

 Papua, Weeds of 733, 734 

 Papyrus 6 3 



Parachute as seed carrier 629, 633 

 Parenchyma 868 



Cells see Cell, Parenchyma 

 Parietal placenta f. 619 

 Farietaria pennsylvanica 72-74, 788, 

 f. 7,?. r.! 

 Distribution 738, m. IS 

 Paris quadrifolia. Distribution 693 

 Parish, B. O. 845 

 Parish, S. B. 725, 845 

 Parosela dalea syn. Dalea aJopecuroi- 

 des. f. 192 

 Pink 192, f. 192 



Distribution m. 193 

 Seed 650-551, f. Sol 

 Parry, C. C. 748, 751, 767 

 Parrish, C. L. 831, 859 

 Parsley f. 612 



Family siin. Carrot Family 

 Fool's 663 



Distribution 736. 

 Parsley-piert 664 

 Parsnip 224, 788 

 Seed f. SSS 

 Cow 234, f. 234 



Seed 562, f. 561 

 Water, Distribution 734 

 Wild 228-230, 794. 796, 807, SOS, f. 229 

 Distribution 688. 719, m. 230 

 Root svstem 64 8 

 Seed 461, f. 462 

 Parsons, C. L. 831, 859 

 Partridge Pea, Distribution 718 

 Paspalum platvcaule. Distribution 722 



sp.. Distribution 701 

 Passiflora foetida 847 



