occidentalis, 782 



maritima, 782 



oblongifolia, 782 



rugosa, 782 



serrulata, 782 

 Alopecurus, 236 



aequalis, 236 



carolinianus, 238 



geniculatus, 238 



myosuroides, 236 



pratensis, 236 

 Alpine timothy, 240 

 Alsatian clover, 1053 

 Alsike clover, 1053 

 Alsine baicalensis, 894 

 Alternanthera, 11, 866, 

 1361 



philoxeroides, 4, 11, 866 

 Althaea. 1113 



officinalis, 1113 

 Altingiaceae, 1012 

 Amamastla, 801 

 Amaranth, 858 



Family, 857 



sandhills, 862 

 Amaranthaceae, 857 

 Amaranthus, 858, 1361, 

 1365 



albus, 861 



arenicola, 862 



austral is, 864 



californicus, 858, 861 



crassipes, 858 



graecizans, 861 



microphyllus, 861 



Palmeri, 862 



spinosus, 861 



tamariscinus, 866 



Warnockii, 858 

 Amarella strictiflora, 1323 

 Amaryllidaceae, 664 

 Amaryllis 



Belladonna, 664 



Family, 664 

 Ambrosia, 1365, 1369, 

 1586, 1642 



aptera, 1645 



Grayi. 1642 



Litidheimeriana, 1645 



psilostachya, 1645 



trifida, 1645 

 texana, 1645 

 American 



beautyberry, 1395 



brooklime, 1493 



cowslip, 1281 



featherfoil, 4, 1277 



frog-orchid, 711 



frog's-bit, 159 



germander, 1408 



holly, 1102 

 hornbeam, 778 

 manna-grass, 185 

 milfoil, 1205 

 pillwort, 57 

 potato bean, 1069 

 slough grass, 259 

 water-willow, 1531 

 winter cress, 981 

 Ammannia, 9, 1161 

 auriculata, 1162 

 arenaria, 1 1 62 

 coccinea, 1162 

 teres, 1162 

 Ammoselinum, 1220 



Butleri, 1223 

 Amorpha, 1055 

 californica, 1055 

 fruticosa, 1056 

 angustifolia, 1056 

 croceolanata, 1056 

 fruticosa, 1056 

 occidentalis, 1056 

 paniculata, 1055 

 texana, 1056 



glabrescens, 1056 

 Ampelopsis, 1112 

 arborea, 1112 

 cordata, 1112 

 Amsinckia, 734 

 Amsonia, 1333 

 glaberrima, 1333 

 illustris, 1333, 1334 

 tabernaemontana, 1333 

 Gattingeri, 1333 

 salicifolia, 1333 

 Anacardiaceae, 1091 

 Anacharis 



canadensis, 1 65 

 densa, 163 

 NuttaUii, 165 

 occidentalis, 165 

 Anagallis, 1291 

 arvensis, 1291 

 caerulea, 1291 

 Anchistea virginica, 67 

 Anchusa, 1384 

 Andropogon, 338 

 glomeratus, 338 

 virginicus 



abbreviatus, 338 

 Androsace, 1284 

 diffusa, 1287 

 glandulosa, 1287 

 occidentalis, 1284 

 arizonica, 1287 

 occidentalis, 1287 

 pinetorum, 1287 

 septentrionalis, 1287 

 glandulosa, 1287 



puberulenta, 1287 

 subulifera, 1287 

 Anemopsis, 737 

 californica, 737 

 subglabra, 111 

 Angelica, 1249 



pinnata, 1249 

 Angel's hair, 1360 

 Angiospermae, 82 

 Anise-root, 1223 

 Annual hairgrass, 222 

 Anoda, 1125 

 cristata, 1125 

 hastata, 1125 

 lavaterioides, 1125 

 Antenoron virginianum, 



810 

 Anthaenantia, 280 

 rufa, 283 

 villosa, 283 

 Anthemis, 1686 

 Cotula, 1686 

 nobilis, 1686 

 Anthopogon 



barbellatus, 1322 

 elegans, 1323 

 Aparejo muhly, 248 

 Apios, 1069 



americana, 1069 

 turrigera, 1069 

 Apium, 1230 

 ammi, 1230 

 graveolens, 1233 

 leptophyllum, 1230 

 Apocynaceae, 1331 

 Apocynum, 1334 

 angustifolium, 1337 

 cannabinum, 1337 

 glaberrimum, 1337 

 pubescens, 1337 

 hyperici folium , 1337 

 sibiricum, 1337 

 cordigerum, 1337 

 salignum, 1337 

 Suksdorfii, 1 337 

 angustifolium, 1337 

 Apple haw, 1020 

 Applemint, 1443 

 Apteria, 689 

 aphylla, 5, 689 

 set ace a, 689 

 Aquifoliaceae, 1097 

 Aquilegia, 917 

 chrysantha, 918 

 coerulea, 917 

 Hinckleyana, 917 

 longissima, 918 

 Arabis, 964 



divaricarpa, 965 



1740 



