INDEX 



Amaranthaceae 3, 113-119, 434-435 



Bibliography 582 



Distribution 716, 723 

 Amaranthus blitoides 117-118, 788, f. 



m 



Distribution 716, m. 117 

 Seed 434, f. ',■!', 

 graecizans 115-116, 788, f. 116 

 Distribution 690, 716, 738 

 Seed 434, f. .',31,, 631 

 hybridus 



Distribution 723 

 paniculatus 697 

 retroflexus 113-115, 790, f. 116 

 Chemical composition 115 

 Distribution 716, 723, 734, 737, 



m. Ho 

 Seed 434, f. -',35. 676 

 Trichomes, f. US 

 sp. Distribution 705, f. 595 

 spinosus 697 



Distribution 723 

 viridis 



I 'istribution 843 

 Ambrosia artemisiifolia 328-331, 778, 

 789, 849, f. 330, 331 

 Distribution 698, 704, 720, 730, 740, 



m. 331 

 Seed 4 82-4 83, f. 4S3, 577 

 bidentata 



Seed 4 83, f. .',83 

 psilostachya 331-332 

 Distribution 689, f. 332 

 Root 651 

 Seed 484, f. >,X3 

 trifida 326-327, 691, 789, f. 327, 672 

 Distribution 691, 720, m. 327 

 Seed 484, 574, f. )>••' 

 American 



Germander 272-273, 469, 470, 789 

 Gromwell, 467 

 Weeds 698 

 Amsinckia 



Distribution 725 

 intermedia 



Distribution 844 

 Anacardiaceae 4, 213, 214. 215 

 Anagallis arvensis 



Distribution 719, 740 

 Anaphalis margaritacea 



Distribution 740 

 Anatropous seed 862 

 Anderson, J. P. XI, 751 

 Anderson, L. 860 

 Andropogon furcatus 688 

 scoparius 688, f. 689 

 sorghum technicus 512, f. 513, 51',, 515 



Seed 512-515 

 sp. Distribution 701 

 virginicum 



Distribution 722 

 Anemia 



Distribution 693 

 Anemone cvlindrica 

 Seed 439, f. J&9 

 Long-fruited 



Seed 439, f. 1,39 

 ANGIOSPERMAE 3. 6-587 

 Angiosperms 6-587, 862 

 Angium 862 

 Angle-pod 787 

 Animals, Seed scattered by 629, f. 633, 



635 

 Annual 647. 650, 691, 862 

 Brome grass syn. Soft Chess 

 Meadow Grass 664 

 Morning Glory 244, 245, 563, 564, 696 

 Sow Thistle 391-393 

 Sunflower 730. 756 

 Winter 647-648, 660, 691, 786, 862 

 Antennaria margaritacea 

 Distribution 705 

 plantaginifolia 

 Distribution 705 



Anthemis arvensis 



Distribution 735-736 

 cotula 360-362, 778, 788, f. 361 



Distribution 696, 720, 736, m. 361 

 Seed 491, f. 1,91 

 Anther 615, 862, f. 615 

 Anthoxanthum odoratum 

 Distribution 693. 714 

 Altera spicaventi seed f. 639 

 Apetalous flowers 609, 862 



Peppergrass syn. Large Pepper grass 

 Apex 862 

 Aphis 



Bean 677 

 rumicis 677 

 Aplopappus sp. 846 

 Apocynaceae 4, 234-237, 701 



Distribution 719, 723 

 Apocynum androsaemifolium 235 

 Distribution 719, m. 235 

 androsaemifolium hypericifolium f. 



236 

 cannabinum 235-237, 788, f. 236 

 Distribution 719, m. 237 

 Root 651 

 Apple 175, 632 

 Leaf, f. 591 

 May 618 

 -of-Peru 



Distribution 737 

 Wild Balsam 573 

 Seed 574 

 Arable land, Weeds of 664, 665 

 Arbutus. Trailing 702 

 Arcangeli. G. 731, 737, 738, 740, 838 

 Arctium lappa 370, 371, 778, 789, 796, 

 799, f. 370, 371, 779 

 Distribution 721, 725, m. 371 

 Root system 644 

 Seed 493, 576-577, f. 1,91,, 577 

 sp. 577, 701 

 Argemone intermedia, 441, f. 1,1,0 

 Distribution 729 

 mexicana 



Distribution 696 

 platyceras syn. A. intermedia 

 Argentine. Weeds 757 

 Aristida dichotoma 28-29, 790, f. 28 

 Distribution, m. 29 

 sp. Distribution 701 

 tuberculosa 29-30, f. SO 

 Arizona seed investigations 834 

 Arkansas weeds 757 

 Armstrong 768 

 Arnica cordifolia 



Distribution 695 

 Arrhenatherum avenaceum 

 Seed 813 

 avenaceum v. bulbosum 851 

 Artemisia biennis 367-368, 790, f. 367 

 Distribution 705, 721, m. 368 

 Seed 492, f. 1,92 

 ludoviciana 366-367, 790, f. 366 

 Distribution m. 367 

 Arthur, J. C. 746, 751, 758, 766, 767, 



826, 838 

 Artichoke 307, 346-348, 790, f. 31,6, 31,7 

 Distribution 691, 740, m. 81,7 

 Trichomes f. 1,88 

 Arum 



Distribution 693 

 Asclepiadaceae 4, 237-241, 634 

 Bibliography 582 

 Distribution 719 

 Seed 462-463, 562-563 

 Asclepias cornuti syn. A. syriaca 

 incarnata 777 



Seed 462, f. 1,63 

 speciosa 237-238, 787, f. 238 



Distribution 719, m. 238 

 svriaca 239-241, 777. 788, f. 239-21,0 

 Distribution 691, 705, 719, 794, m. 



