INDEX 



901 



Rafinesque, C. S. 774, 854 

 Ragweed, Greater 326-327, 789, f. 327, 

 671, 691 

 Distribution 691, 720, m. 327 

 Root system 645 

 Seed 484, 574, 674, 814, f. 483 

 Lance-leaved, Seed 483, f. J,S3 

 Large syn. Greater Ragweed 

 Perennial 331-332, f. 332 

 Distribution 689 

 Root system 651 

 Seed 4 84, f. .',sj 

 Pollen 681 



Smaller 328-331, 657, 658, 659, 660, 

 778, 789, f. 329, 330 

 Distribution 698, 705, 720, 730, 740, 



m. 330 

 Root system 645 

 Seed 482-483. f. 483, 557 

 sp. 625, 793, 807, 822 

 Western si/n. Perennial Ragweed 

 Ragwort 665, 667, 678, 743, 750 

 Ranunculaceae 4, 139-142 

 Bibliography 586 

 Distribution 717, 724 

 Seed 43S-440, 536 

 Ranunculus abortivus 139-140, 787, /. 

 139 

 Distribution 717, m. 11,0 

 Seed 440, 536, f. .',',0, 536 

 acris, Distribution 717 



Seed 440, f. 1,1,0 

 arvensis 663 



Distribution 736 

 bulbous, Distribution 717 

 cymbalaria, Distribution 742 

 flammula, Distribution 736 

 multifidus, Embryo f. 021 

 pennsylvanicus, Distribution 742 

 repens, Distribution 742 

 septentrionalis 140-141, 787, f. HI 

 Distribution 717, 736, in. 11,1 

 Rape 142 



Seed 445, 810, 811, 813, f. i',J 

 Broom 665, 735, 827 

 Raphanus raphanistrum 153-155, 665, 



f. m 



Chemical composition 674 

 Distribution 696, 699, 717, 735, 736, 

 in. 155 

 sativus 788 



Distribution 725 

 Seed 444, f. Wi 

 Raphe 869 

 Raspberrv 175, 703 



Black 632 

 Rat-tail Plantain 638 

 Rattle. Yellow 667 



Distribution 742 

 Rattle-box {Astragalus) 193-194, f. 19.', 

 Rattle-box (Crotalaria) 182-183, 788, 

 f. 182 

 Distribution 718, m. 183 

 Seed 450, 545-546, f. .',50, 51,6 

 Rattlesnake Root, Seed 501, f. 501 



Weed 703 

 Ratzeburg, J. T. C. 754, 767, 826, 845 

 Rawson, W. B. 851 

 Raymond, L. H. 74 9 

 Receptacle 869 



as seed disseminator 631 

 Red Bud 180 



Campion 605, 716 

 Cedar 6 

 Cherry 694 



Clover 78, 130. 1 4 r », 175, 360, 451, 

 674, 692, 698. 705, 712, V^I, S10, 

 SU, 812, 828, 830, 831, 832, 833. 

 835, 836, 855, 856, 857, 858, 859, 

 860 

 Mammoth 811, 812 

 Medium 811, 830 



Small 812 



Top 415, 680, 715, 805, 806, 810 

 Red River Valley- Weeds 751 

 Redroot 113-115, f. 116 



Chemical composition 115 

 Distribution m. 115 

 Red-seeded Dandelion 390-391, 498, 



631, 721 

 Red-shank syn. Lady's Thumb 

 Red-veined Dock syn. Bitter Dock 

 Reed Grass, Distribution 733, 736 

 Reed Bent Grass 693, 736 

 Reed-mace Fungus 677 

 Rees, Bertha 829 

 Register and Leader 803 

 Rehnstron, B. 750 

 Reinbott, C. 746 

 Reppert, P. 745, 749, 760, 763 

 Reseda lutea, Distribution 717 

 ResedaceaEj Distribution 717, 724 

 Respiration 600, 869 

 Rest-harrow 607 

 Reum, J. A. 845 

 Reynold, A. P. 749 

 Rhamnaceae. Distribution 724 

 Rhinanthus crista-ealli major, Distri- 

 bution 736, 742 



crista-galli minor, Distribution 736 

 Rhizoctinia violacea 677 

 Rhizome 649, 650, 651, 869, f. 6.',3, 651, 



052 



Rhode Island Weeds 766 

 Rhodin, S. 851 

 Rhomb-leaf Sida 723 

 Rhus glabra 841 



toxicodendron 213, 214, 787, f. 21). 215 

 Root system 652 

 Rib 869 



Rib Grass syn. Buckhom 

 Ribbon Grass 8 

 Ribwort 665 

 Rice Cut Grass f. 739 

 Distribution 740 

 Rice weeds 840, 847 



Wild, Seed 856 

 Richardia scabra. Distribution 723 

 Richman, Mrs. 766 

 Ricinus communis, Distribution 696, 



697, f. 697 

 Ridley, H. N. 859 



Road funds, How applied in Iowa S00 

 Roberts, B. D. 762 

 Roberts, H. F. 831, S59 

 Robinia nseudo-acacia, Distribution 



718 

 Rocket 159, 160, f. 159 

 Distribution in. 160 



Yellow 787 

 Robinson. B. L. 731, 754, 767, 768 

 Rocky Mountain Bee-plant 173-175, 448 



Sand bur 794 



Weeds 729 

 Rolfs. P. H. 557, 586, 745, 748, 751, 



755, 756, 859 

 Rollins, J. 766 

 Romer, F. 845 

 Rommatin 852 

 Root 869 



Aerial 645 



Annual 647, 649 

 Winter r,4 7. 657 



Biennial 64s, 649, 650 



Central 644 



Classification 647, 649 



Fibrous 645, 650, f. 6)9 



Fleshy 64x. R50 



Forms 6-14-650 



Functions 644, 64 5 



Lateral 644 



Parasitic 645 



Perennial 648-649, 650 



Primary 644. 650 

 Multiple 644 



