900 



INDEX 



Prickly 440-441, f. UO 

 Distribution 729 

 Seed 539, f. 5S9 



Rocky Mountain syn. Prickly Poppy 

 Populus grandidentata 703 



tremuloides 703 

 Porch er, P. P. 854 

 Porcupine Grass syn. Needle Grass 

 Pore-canal 869 

 Portulaca oleracea 136-138, 788, f. ISn, 



Chemical composition 138 

 Distribution 691, 696, 697, 701, 717, 



723, 729, 763-764, m. ISS 

 Seed 438, f. J^S 

 sp. 701 



PORTULACACEAB 3, 134-138 



Distribution 717, 724, 763-764 

 Seed 438 

 Potato 67, 277, 283 



Family syn. Nightshade Family 

 Scab 680 

 Sweet 241 

 Potentilla anserina 177-178, 663, 787, 

 f. m 

 Seed 448, f. m 

 canadensis. Seed 448-449, f. US 

 fruiticosa 632 

 monspeliensls 175-176, 596, 789, f.W 



Distribution 742, m. lie 

 monspeliensis v. norvegica 614 

 seed 449, f. J,i9 

 Poverty Grass 28-29, 790, f. 28 

 Distribution m. £9 

 Long-awned 29-30, f. SO 

 Poverty Weed syn. Marsh Elder 

 Prairie Clover, Hairy 550, 551, 552 

 Farmer 247, 382, 826 

 Iowa, Native Flora of 688-692 

 Larkspur 142, 439 

 Plantain 303-305 

 Rose, Wild 178-180, 449, 450 

 Sunflower 342-343, 487, 488 

 Thistle 376-377, 789, 790 

 Prenanthes alba 501, f. 501 



sp. 703 

 Prentiss, A. M. 845 

 Preston, B. H. 756 



Prickly Lettuce 396, 397, 398, 399, 500, 



501, 596, 645, 664, 721, 725, 729, 



747, 758, 789, 819, 826, 838, 840 



(integrata) 396-399, 500, 501, 721, 



747 

 Poppy 440, 441, 539, 729 

 Sida 218, 219, 569, 660, 718, 722, 723, 

 734, 789 

 Primrose. Evening 224-225, 592, 776, 

 788, 819, f. 22S 

 Distribution 718, 762, m. 225 

 Root system 645 

 Seed 460, 560, f. 560 

 Evening (O. grandiflora). Distribu- 

 tion 696 

 (O. sinuata). Distribution 737 

 Family 224-226 

 Distribution 724 

 Seed 460, 560 

 Primulaceab. Distribution 719, 724 

 Prince's Feather 74 

 Distribution 763 

 Seed 428, f. J,28 

 Prlster 583 

 Privet f. 59J, 

 Procambium 869 

 Propagation of weeds 650-661 

 Propertv tax for weed destruction 800, 



802 

 Prostrate Pigweed 117-118 

 Spurge 208-209 

 Vervain 267-268, 690 

 Protein 869 



Prunella vulgaris 270-271, 667, 777, f. 

 271 

 Distribution 142, m. Zri 

 Seed 470, f. 101, 6S8 

 Prunus emarginata, Distribution 694 

 pennsylvanica 703 

 serotlna f. 6Sn 

 Psedera quinquefolia 213 

 Pseudotsuga taxlfolia. Distribution fi 94 

 Prussian weeds 754 

 PTERIDOPHYTA 3, 5-6 

 Pteris, Distribution 693 

 aquilina 667, f. 69i 

 Distribution 693 

 caudata. Distribution 693 

 sp. 693 

 Puccinia coronata f. 629 

 graminis 678, 680, f. 679 

 hieracii 678 

 pringsheimiana 678 

 rubigo-vera 680, f. '678, Sr9 

 Puoooon, Narrow-leaved, Seed 467, f. 



i67 

 Puget Sound Weeds 727 

 Pulse Family 180-199, 450-455, 545-554, 

 592, 734 

 Distribution 724, 759-761 

 Purity of Seeds, Standard 812-813 

 Purple Cockle 814 

 Cone-flower f. 666 

 Loco-weed 194-195 

 Thorn Apple syn. Jimson Weed 

 Stramonium syn. Jimson Weed 

 Purslane 136-138, 788, f. 137, 76i 

 Chemical composition 138 

 Distribution 691, 696, 697, 701, 



717, 723, 729, 763-764, m^ ISB 

 Seed 438, 814 

 Family 134-138 



Distribution 724, 763-764 

 Milk syn. Creeping Spurge 

 Pusley syn. Purslane 

 Pyrethrum 307 

 Pyrola, sp. 702 



Quack Grass 8, 27. 53-58, 241, 273, 664, 

 665, 688, 773, 774, 781, 786, 794, 

 796, 810, 819, 822, 844, 847, 848, 

 850, 852 

 Chemical composition 57-58 

 Diseases 680, 736 

 Distribution 715, 736, m. 55 

 ergot 680 



Root system 648, 651, f. 6iS 

 Seed 421-423, 640, 674, 810, 814, f. 

 Ji22, 688 

 Quade, C. R. XII 

 Quaking Grass 667 

 Quassia Family, Distribution 725 

 Quebec weed legislation 793 



Weeds 768 

 Queensland Weeds 838 

 Quick Grass svn. Quack Crrass 

 Quince 175, 632 



Raceme 611, 869, f. 612 

 Rachllla 869 

 Rachis 869 

 Raddln 765, 766 

 Radial leaves 592 



Distribution 717, m. 269 

 Radicula armoracla 168-169, 788, f. 169 

 Distribution 717, m. 209 

 nasturtlum-aquaticum. Distribution 



717 

 palustris 167-168, f. 167 

 Distribution 742, m. 168 

 Seed 447, f. 1,1,7 

 Radish 142, 788 

 Cystopus on 678 



Seed 444, f. Ui 

 White 845 

 Wild syn. Jointed Charlock 



