INDEX 



258. 259; rarity of blue among, 252, 

 253 



Pomegranate, 264 



Pond weed, 36 



Pontederia cordata, 90, 105 



Poplar-tree, 24 



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

 colors of, 248; scarlet, 228 



Portulaca, 238; grandiflora, 218 



Potato-bug, 189 



Potatoes, beetles on, 185 



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

 232, 247 



Primula acaule, 134 



Prison-flowers, 164, 166 



Pronuba moth, 140; habits of , 143-145 



Prosopis, 121, 194 



Proleacese, 203 



Prmius virpiniana, 180 



Psijchoda, 168 



Pulmonaria officinalis, 84, 174 



Pulse family, 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 avreum, 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, ocymoides, 128; officinalis, 



151 

 Sarcophaga, 161 



Sarcophagous beetles, 186, 188, 189 

 Saxifrages, dots on coroUa of, 164; 



varieties of. 164 

 Scarabseids, 189, 190 

 Scarabaeus, 190 

 Scarlet runner, 84, 94; punctures in, 



100; white variety of, 244 

 Scopolia atropoides, 84 

 Scrophulariaceas, 56, 64, 194 

 Scutellaria galericulata, 98 

 "Secret of Nature in the Form and 



Fertilization of Flowers Discovered," 



9-12 

 Sedges. 202, 223, 262; wind-poUinated, 



30-36 

 Sedum, acre, 238; purpureum, 238 

 Self-pollination, 224, 262; of grasses 



and sedges, 30 ; prevention of, 26, 28 

 Senecio, 234; Douglasii, 112 

 Shadbush, 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 

 Silene, 134; acaulis, 128; longi flora, 



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 

 Solanacese, 194 

 Solanum Dulcamara, 196 

 Soldier-beetle. 188. 189 

 Solidago, 110. 121, 234; bicolor, 94, 95; 



graminifolia, 94; juncea, 112; rugosa, 



94 

 Sorrel, 36, 104, 223, 238 

 Spanish bayonet, 124; moth-pollinated, 



140, 143 

 SpeedweUs, 56, 172 

 Sphingidae, 126, 140 

 Spider-plant, 90 

 Spiders, crab, 102-104 

 Spiraea, 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- 



spicuousness of, 214 

 Squash-bug, 189 

 Stachys erecta, 56, 65 

 Stahl, 230, 246 



285 



