874 



INDEX 



Amaranthaoeae 3, 113-119, 434-435 



Bibliography 582 



Distribution 716, 723 

 Amaranthus blltoldes 117-118, 788, t- 



m 



Distribution 716, m. Ill 



Seed 434, f. m 

 graecizans 115-116, 788, f. 116 



Distribution 690, 716, 738 



Seed 434, f. m, 6S1 

 hybridus 



Distribution 723 

 panlculatus 697 

 retroflexus 113-115, 790, f. 116 



Chemical composition 115 



Distribution 716, 723, 734, 737, 

 m. 115 



Seed 434, f. J,S5, 676 



Trichomes, f. lis 

 sp. Distribution 705, f. 595 

 spinosus 697 



Distribution 723 

 viridis 



Distribution 843 

 Ambrosia artemisiifolia 328-331, 778, 

 789, 849, f. SSO, SSI 



Distribution 698, 704, 720, 730, 740, 

 m. SSI 



Seed 482-483, f. IfiS, ST/ 

 bidentata 



Seed 483, f. iSS 

 psilostachya 331-332 



Distribution 689, f. SSB 



Root 651 



Seed 484, f. m 

 trifida 326-327, 691, 789, f. S21, 672 



Distribution 691, 720, m. S27 



Seed 484, 574, f. JfiS 



Germander 272-273. 469, 470, 789 

 Gromwell, 467 

 Weeds 698 

 Amsinckia 



Distribution 725 

 intermedia 



Distribution 844 

 Anacaediaceae 4, 213, 214. 215 

 Anagallls arvensis 



Distribution 719, 740 

 Anaphalis margaritacea 



Distribution 740 

 Anatropous seed 862 

 Anderson, J. P. XI, 751 

 Anderson, D. 860 

 Andropogon furcatus 688 

 scoparlus 688, f. 689 

 sorghum technicus 512, f. SIS, Slli, 515 



Seed 512-515 

 sp. Distribution 701 

 virginicum 



Distribution 722 

 Anemia 



Distribution 693 

 Anemone cvlindrica 

 Seed 439, f. 489 

 Long-fruited 



Seed 439, f. JiS9 

 ANGIOSPBRMAB 3. 6-587 

 Angiosperms 6-587, 862 

 Angium 862 

 Angle-pod 787 

 Animals. Seed scattered by 629, f. 63S, 



6SS 

 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. SCI 

 Seed 491, f. m 

 Anther 615, 862, f. 615 

 Anthoxanthum odoratum 

 Distribution 693, 714 

 Apera svicaventi seed f. 6S9 

 Apetalous flowers 609, 862 



Pepvergrass syn. Large Peppergrass 

 Apex 862 

 Aphis 



Bean 677 

 rumlcis 677 

 Aplopappus sp. 846 

 Apoctnacbab 4, 234-237, 701 



Distribution 719. 723 

 Apocynum androsaemifolium 235 

 Distribution 719, m. 2S.5 

 androsaemifolium hypericifolium f. 



Z36 

 cannabinum 235-237, 788, f. 236 

 Distribution 719, m. 237 

 Root 651 

 Apple 175, 632 

 Leaf, f. 591 

 May 618 

 -of-Feru 



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, 37 1, 779 

 Distribution 721, 725, m. S71 

 Root system 644 

 Seed 493, 576-577, f. m. 577 

 sp. 577, 701 

 Argemone intermedia, 441, f. W) 

 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 cordlfolia 



Distribution 695 

 Arrhenatherum avenaceum 

 Seed 813 

 avenaceum v. bulbosum 851 

 Artemisia biennis 367-368, 790, f. 367 

 Distribution 705. 721, m. S68 ■ 

 Seed 492, f. m 

 ludovlciana 366-367, 790, f. S66 

 Distribution m. SSI 

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



826, 838 

 Artichoke 307, 346-348, 790, f. 3!^, Si7 

 Distribution 691, 740, m. 31,7 

 Trichomes f. 488 

 Arum 



Distribution 693 

 ASCLBPIADACBAE 4, 237-241. 634 

 Bibliography 582 

 Distribution 719 

 Seed 462-463, 562-563 

 Asclepias cornuti syn. A. syriaca 

 incarnata 777 



Seed 462, f. ^63 

 speclosa 237-238, 787, f. 238 



Distribution 719. m. 238 

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

 Distribution 691, 705, 719, 794, m. 



