232 LIVING PLANTS 



Olpidiopsis 225 



Onion 108 



Ostrya (ironwood) 182 



Oxalidae 4.7 



Oxalis • 55 



* ' Acetosella 189 



" floribtinda 138 



" vespertilionis 138 



Ox-eye daisy (Levcanthernum) 4.1 



PEAS 100, 107, 108, 109,111,113,118,119 



Peach yellows 103 



Phalaris 24 



Philotria Canadensis 96, 181 



Phoenix dactylifera (date) 136, 138 



Pigweed (Amaranthus retro fJexiis) 4.0 



Pine 94. 



Pinus humilis 94- 



Piper porphyraceum 187 



Platanns (Sycamore) : 181 



Poison oak (Rhus toxicodendron) 162 



Pondweed (Elodea) 96, 181 



Poplar 157 



Popttlus 182 



Potato 201 



Prickly lettuce 31, 33, 43 



Pulmonaria 177 



Pumpkin (Cacurhita Pepo) 74 



Purslane (Portiilaca oleracea) 40, 196 



RADISH 100 



Ragweed (Ambrosia artemisisefolia) 40 



Ranunculus ficarioides 186, 187 



Redbud iCercis) 15, 81 



Red m aple 185 



Red se a- weed 185 



Reesia 225 



Rhododendron 94 



Robinia Pseudacacia 62 



Rosin weed (Silphium laciniatum) 43 



Rots 200 



Rozella 225 



Rumex (dock) 182 



Rusts 200 



Rve 108 



