A SEED KEY TO COMMON WEEDS 393 



Melilotus alba 49 Prickly Lettuce 113 



Milfoil 96 Primrose, Evening 59 



Milkweed 62 Prunella vulgaris 71 



Moth Mullein 75 Purslane 35 



Motherwort 72 Pussley 35 



Mouse-ear 30 Ragweed, Common 87 



Mullein, Common 74 Ragweed, Giant 86 



Mullein, Moth 75 Ragweed, Great 86 



Mustard, Flack 40 Ragwort 102 



Mustard, Common Wild 42 Ramsted 76 



Mustard, Hedge 41 Ranunculus abortivus 36 



Narrow-leaved Dock 13 Ranunculus acris 37 



Nepeta Cataria 70 Rattlesnake Root 116 



Nettle, Wood 12 Red-root 67 



Night-flowering Catchfly 33 Red-top 7 



None-such 51 Rhus Toxicodendron 53 



Old Witch Grass 2 Rib Grass 79 



Orach, Spreading 23 Ripple Grass 79 



Ox-eye 99 Rock Grass 43 



Ox-eye, Sweet 90 Roman Wormwood 87 



Paint-brush 117 Rudbeckia hirta 91 



Panicum capillare 2 Rumex Acetosella 15 



Pepper Grass 38 Rumex crispus 13 



Pepperwort 38 Rumex obtusifolius 14 



Phleum pratense 6 Saint John's Wort 58 



Pigeon Grass 4 Salsify 108 



Pigeon Grass, Green 5 Sandwort, Thyme-leaved 28 



Pigweed, Common 22 Saponaria officinalis 34 



Pigweed, Rough 24 Scabious, Sweet 83 



Pigweed, Slender 25 Self Heal •• 71 



Plantago lanceolata 79 Senecio vulgaris 102 



Plantago major 77 Setaria glauca 4 



Plantago Rugelii 78 Setaria viridis 5 



Plantain, Broad-leaved 77 Sheep Sorrel 15 



Plantain, Common 77 Shepherd's Purse 39 



Plantain, English 79 Silene noctiflora 33 



Plantain, Narrow-leaved 79 Sisymbrium officinale 41 



Plantain, Ruga's 78 Snake Grass 8 



Poa compressa 9a Soapwort 34 



Poa pratensis 9 Sonchus asper 112 



Poison Ivy 53 Sonchus oleraceus Ill 



Polygonum aviculare 16 Sorrel 15 



Polygonum Convolvulus 19 Sow Thistle Ill 



Polygonum Persicaria 17 Sow Thistle, Spiny-leaved. .. .112 



Polygonum scandens 20 Spergula arvensis 27 



Polygonum virginianum 18 Spurry 27 



Portulacca oleracea 35 Squaw-weed 102 



Potentilla monspeliensis 44 Stellaria media 29 



Prenanthes alba 116 Stickweed 66 



