INDEX 



Parsnip 7, 54, 115, 133 



Garden 11 



Water 4, 64, 72 



Wild 11, 26, 67, 72, 206-207 



Partridge Pea 26, 28, 31, 64, 72, 188 



Paspalum platycaule 68 



Pasque Flower 64 



Pastinaca saliva 72, 206-207 



Legislation 43 



Pastures 



Result of overstocking 51-52 



Spraying 101 



Weeds of 50-57 



Patience Dock 69, 163 



Pea 132, f. 133 



Partridge ... 26, 28, 31, 64, 72, 188 



Sweet 128 



Peach 64, 133 



Peach-leaved Dock 12, 163 



Pearl 



Grass, Blue 36 



Millet, Legislation 48 



Pea- vine Clover 47 



Pellitory Parietaria 72 



Pennisetum lyphoideum. Legisla- 

 tion 48 



Pennsylvania Smartweed 



13, 58, 166, f. 167 

 Pennycress ..57, 100, 179-180, f. 180 



Field, Germination 40 



Pepo 133 



Pepper 133 



Family 160 



Water 24, 166 



Pepper Grass 4, 15, 18, 24, 28, 31, 



36, 55, 56, 72, 115 



Eradication 100 



Large 180 



Small 180, f. 181 



Virginia 72 



Wild 33 



Germination 42 



Peppermint 12, 59, 220 



Pepper \Veed 72, 214 



Perennial 7. f. 8 



Ragweed 59 



Rye 78 



Sow Thistle 67, 73 



Perfect flower 125 



Pericarp 132 



Perigynous flower 127 



Perisperm . . . / 133 



Persia, Weeds of 81 



Persicaria 56 



Phalaris canariensis 145 



Philippine weeds 81 



Phleum pratense 28, 31, 33 



Legislation 48 



Phlox Family 128, 214 



Phylolacca decandra 59, 73, 172 



PHYTOLACCACEAE 172 



Pigeon Grass 



9, 16,28,31,32,58,62, 115, 142 



Eradication 98, 111 



Germination 42 



Page 

 Pigweed 



10,24,31,58,59,65,73,115 



Eradication 95, 98, 99, 100 



Germination . . . . 42 



Prostrate 171. f. 172 



Eradication 96 



Rough 13 



Spiny 58 



Stem of 117 



Thorny 73 



Winged f. 15, 167 



Pine 129, 133 



Pineapple weed 59 



Pink f. 124, 130 



Family 173-176 



Hardy 174 



PIPERACEAE 136, 160 



Pistil, compound 132 



Pitchfork, Seed of f. 21 



Placenta 130 



axile 130 



free 130 



parietal 130 



Plant community 1 



PLANTAGINACEAE 137, 225-227 

 Planlago 



aristata 28, 33, 72, 227, f. 228 



Germination 42 



Legislation 46 



lanceolata 28, 33, 46, 52 



Germination 42 



Legislation 43, 46 



major 72, 226-227 



Vitality 38 



media, germination 40 



Rugelii 31, 33, f. 226, 227 



Germination 42 



virginica 59 



Plantain 10, 11, 13, 125 



Bracted 28, 30, 32, 33, 55, 115, 



227, f. 228 



Germination 42 



Legislation 46 



Buckhorn, Legislation 46 



See also Buckhorn 



Hoary, germination 40 



Legislation 43 



Narrow 67 



' Rib or Ribbed 52, 67 



Rugel's 28, 31,33, f. 226, 227 



Germination 42 



Virginia 59 



Plum 133 



Plumule 134 



Poa 



annua 61 



compressa 68, 152 



Legislation 46, 47 



pratensis 28 



Legislation 46 



serotina 28 



Poison 



Darnel 153 



Hemlock 64, 205 



Ivy 26, 64, 73, 1 16, 198 



Poisonous Weeds. .4, 53, 54, 57, 63-6<" 



