JNDEX 



258, 259; rarity of blue among, 252, 

 253 



Pomegranate, 264 



Pond weed, 36 



Ponlederia cordata, 90, 105 



Poplar-tree, 24 



Poppies, 194, 224; bee visitors of, 196; 

 colors of, 248; scarlet, 228 



Porlulaca, 238: grandiflora, 218 



Potato-bug, 189 



Potatoes, beetles on, 185 



Primrose, 132, 134, 234; evening, 150, 

 232, 247 



Primula acaulc, 134 



Prison-flowers, 164, 166 



Pronuba moth, 140; habits of, 143-145 



Prosopis, 121, 194 



Proteacese. 203 



Prunus riroiniana, 180 



Psychoda, 168 



Pulmonaria officinalis, 84, 174 



Pulse familv, 196, 199, 201 



Pumpkin, 272, 274; bee of field, 114 



Punctures in corolla-tubes, 96-102 



Purple flowers, 221-224, 254-256 



Purslane, water, 227 



Pussy-willow, change in manner of pol- 

 lination of, 23, 24; insects visiting, 

 110 



Pyrus, arbutifolia, 180; communis, 212 



Queen of the Night, 146 

 Quitch-grass, 36 



Ragweed, 36, 202, 223, 227 



Rainfall, effect of, on red clover, 72 



Raspberries, 116, 188; number of 

 varieties of, 263 



Red, effects of, 247 



Red clover, 70-72, 102 



Red flowers, 134, 136, 221-224, 245- 

 248; and blue, 252: coloration of, 

 245-248; distribution of, 247, 248; 

 more primitive than blue, 247 



Regular flowers, 86, 261, 262 



Retrogression in flowers, 227, 237, 242, 

 244, 254 



Rhododendron, 248; maximum, 203 



Rhodora, 9; canadensis, 84 



Rhyncophora, 190 



Ribes aurcum, 223, 237 



Riley, 140, 144 



Rock-maple, 227, 228, 232 



Rock-rose, 194 



Rodrique, 237 



Root, E. R., 116, 271, 275 



Rose, 60, 64, 227, 228, 232, 250; beetles 

 on, 182; insects visiting, 194; never 

 blue, 250, 252; pollen-flower, 194, 

 200; no nectar secreted by, 193, 194; 

 red, 247; yellow and white, 232 



Rose-chafers, 190 



Rove-beetles, 188 



Rubus, 278 



Rumex Acetosella, 104 



Rushes, 202, 223 



Sages, 56, 62, 84, 119 

 St.-John's-wort, 194; colors of, 234 



Salix, 23, 24, 110, 121; pollen and nec- 

 tar yield of, 119 

 Salvia, 48; pratensis, 84 

 Sand-pink, 151 

 Sandwort, 244 

 Saponaria, ocymoidcs, 128; officinalis, 



151 

 Sarcophaga, 161 



Sarcophagous beetles, 186, 188, 189 

 Saxifrages, dots on corolla of, 164; 



varieties of, 164 

 Scaraba?ids, 189, 190 

 Scarabaeus, 190 

 Scarlet runner, 84, 94; punctures in, 



100; white variety of, 244 

 Scopolia atropoides, 84 

 Scrophulariacese, 56, 64, 191 

 Scutellaria gahriculata, 98 

 "Secret of Nature in the Form and 



Fertilization of Flowers Discovered," 



9-12 

 Sedges, 202, 223, 262; wind-pollinated, 



30-36 

 Scdum, acre, 238; purpureum, 238 

 Self-pollination, 224, 262: of grasses 



and sedges, 30: prevention of, 26, 28 

 Senecio, 234: Douglasii, 112 

 Shad bush, 180 

 Sham-nectar producers, 102 

 Shoe-flower, 56 



Shrubs, blossoms of, 239; deciduous- 

 leaved, 223; red-flowered, 248; 



yellow-flowered, 232, 234; wind- 

 pollinated, 24 

 Silenc, 134; acaulis, 128; longiflora, 



151; noctiflora, 150; nutans, 151 

 Silver-winged butterfly, 96 

 Skullcap, 56, 253; punctures in, 98 

 Skunk-cabbage, 163, 164 

 Smilax, 227 

 Smith. 110 

 Snapdragon, 56, 62, 63, 232, 244, 254 : 



bumblebee-flower, 78; nectar-guides 



on, 65; regular form of, 86 

 Snout-beetles, 190 

 Soapwort, 128 

 Solan accee, 194 

 Solanum Dulcamara, 196 

 Soldier-beetle, 188, 189 

 Solidago. 110, 121. 234; tricolor, 94, 95: 



craminifolia,94; juncca, 112; rugosa, 



94 

 Sorrel, 36, 104, 223, 238 

 Spanish bavonet, 124; moth-pollinati'd, 



140, 143 

 Speedwells, 56, 172 

 Sphingidse, 126, 140 

 Spider-plant, 90 

 Spiders, crab, 102-104 

 Spinea, 92, 190, 194; salicifolia, 180 

 Sprengel, Christian Conrad, 9-12, 102, 



210 

 Spring-beauty, 110 

 Spruce-tree, 38, 40 

 Squash, 232, 272, 274; value of con- 



S>icuousness of, 214 

 Squash-bug, 189 

 Stachys erecta, 56, 65 

 Stahl, 230, 246 



285 



