Page 



Orange 19 



Orchid 16 



Oryza 11 



Oxytropis 14 



Palm 16 



Panicum 11 



Papyrus 10 



Pear 18 



Pecan 13 



Peppergrass 10 



Persea 13 



Phoenix 16 



Phoradendron 14 



Picea 17 



Pigweed 6 



Pine 17 



Pinus 17 



Pinyon 17 



Pipturus 21 



Pistacia 6 



Pistia 7 



Pitcher plant 19 



Poa 12 



Podophyllum 7 



Poison Ivy 6 



Pontederia 1*8 



Poplar 19 



Poppy 16 



Populus 19 



Potamogeton 18 



Page 



Potato 20 



Primrose 18 



Primrose, evening. .16 



Primulus 18 



Pseudotsuga 17 



Pyrus 18 



Quercus 11 



Ragweed 8 



Ragwort 9 



Ranunculus 18 



Rape 10 



Raspberry 18, 19 



Redbud 13 



Rhododendron . .10, 11 



Rhus 6 



Rice 11 



Rohinia 14 



Rosa 18 



Rose 18 



Rosemallow 15 



Rubus 18, 19 



Ryegrass 12 



Saccharum 12 



Salix 19 



Sarracenia 19 



Sauromatum 7 



Scrophularia 19 



Sea-buckthorn 10 



Page 



Seagrape 17 



Secale 12 



Senecio 9 



Sequoia 17 



Sequoiadendron .... 17 



Silversword 8 



Skunk Cabbage 7 



Solanum 20 



Solidago 9 



Sorghum 12 



Soybean 13 



Spanish-Moss 7 



Spartina 12 



Spire a 18 



Spruce 17 



Strawberry 18 



Sudan Grass 12 



Sugarcane 12 



Sumac 6 



Sunflower .9 



Sweetpotato 10 



Symplocarpus 7 



Tamarack 17 



Taraxacum 9 



Teosinte 12 



Thistle 9 



Tilia 20 



Tillandsia 7 



Toadflax 19 



Page 



Tobacco 20 



Trefoil 14 



Trifolium 14 



Trillium 14 



Triticum 12 



Tulip 14 



Tussock 11 



Typha 20 



Vlmus 20 



Uniola 12 



V accinium 11 



Verbascum 19 



Vemonia 9 



Vigna 14 



Viola 21 



Violet 21 



Vis cum 14 



Vitis 21 



Waterlily 16 



Wattle tree 13 



Walnut 13 



Wheat 12 



Willow 19 



Yucca 14 



Zea 12 



33 



