
Phytolacca 
Picea 
Pickerel-weed 
Pigeon Berry 
ans 
Pigwee 
vee 
Pilea 
Pimpernel, False 
Pine 
Pipewort 
Pipsissewa 
Pitcher-plant 
Plantago 
Plantain 
Rattlesnake 
Robin’s 
Water 
Plantanus 
Plectonema 
Plowrightia 
Plum 
Poa 
Pogonatum 
Pogonia 
Poison Ivy 
Poke, Common 
Indian 
Pokeweed 
Polygala 
Polygonatum 
Polygonum 
Polypodium 
Polypody 
Polyporus 
Polytrichum 
Pond-lily, Yellow 
Pondweed 
Pontederia 
Poplar 
Populus 
Portulaca 
Potamogeton 
Potentilla 
Pottia 
Prenanthes 
Prickly Ash 
Primrose, Evening 
Prince’s Pine 
Privet 
Proserpinaca 
Prunus 
Pteris 
Puccinia 
Purslane 
Water 
Pusley 
Pycnanthemum 
Pylaisia 
Pyrola 
One-flowered 
Pyrus 
Quaker Ladies 
INDEX. 
Quercus 
Quillwort 
Quince 
Racomitrium 
Radish 
Ragweed 
Ragwort, Golden 
Ranunculus 
Raphanus 
Raspberry 
Rattlesnake-root 
Rattlesnake-weed 
Red Top 
False 
Reseda 
Rhamnus 
Rhexia 
Rhododendron 
Rhodora 
Rhus 
Rhynchospora 
Rhytisma 
Ribes 
Ribgrass 
Rice, Mountain 
Richweed 
Rinodina 
Robinia 
Rocket, Yellow 
Rock-Rose 
Restelia 
Roman Wormwood 
Rosa 
Rose 
Rose Bay 
Rubus 
Rudbeckia 
Rue-Anemone 
Rue, Goat’s 
Meadow 
Rumex 
Rush 
Beak 
Club 
Scouring 
Spike 
Wood 
Rye, Wild 
Sagittaria 
Salix 
Sambucus 
Sand-Spurrey 
Sandwort 
Sanguinaria 
Sanicula 
Saponaria 
Sarracenia 
Sarsaparilla, Wild 
Sassafras 
Savin 
Saxifraga 
Saxitrage 
Golden 
Schizophyllum 
| Schizothrix 
Scirpus 
Scleranthus 
Scutellaria 
Sedge 
Sedum 
Selaginella 
Self-heal 
Senecio 
Sericocarpus 
Service Berry 
Setaria 
Shadbush 
Sheep’s Fescue 
Shepherd’s Purse 
Shinleaf 
Sickie-pod 
Side-saddle Flower 
Silene 
Sisymbrium 
Sisyrinchium 
Sium 
Skullcap 
Skunk Cabbage 
Smartweed, Common 
Smilacina 
Smilax 
Snake-head 
Snakeroot, Black 
White 
Sneezewort 
Soapwort 
Solanum 
Solidago 
Solomon’s Seal 
Dwart 
False 
Sonchus 
Sorrel 
Field 
Wood 
Sour-gum Tree 
Spanish Bayonet 
Sparganium 
Spatter Dock 
Specularia 
Speedwell 
Sphagnum 
Spice Bush 
Spikenard 
False 
Spirza 
Spiranthes 
Spirodela 
Spirogyra 
Spleenwort 
Sporobolus 
Spruce 
Spurge 
Squaw-root 
Stachys 
Staff-tree 
Star-flower 
Star-of-Bethlehem 
Starwort 
Water 
Steeple Bush 
Steironema 
Stellaria 
Stereocaulon 
Sticta 
Stigeoclonium 
Stigonema 
Stipa 
