INDEX. 



255 



Pago. 



Orchis FamDy 119 



Order-covers 225 



Orders, Arrangement of 51 



of which the names given them by 

 European and American authors 



differ 51 



Eank, number of genera, and spe- 

 cies and varieties of the sixteen 



largest . 35 



Ornithogalum 123, 188 



Orobanchaceio 103 



Orobancho 103, 170 



Orontium 117, 185 



Orpine 79 



Family 79 



Orthotrichum 141,202 



Osage-Orange Ill 



Osmorrhiza 82, 162 



Osmunda 139,201 



cinnamomea 50 



Clay toniana 50 



regalis 50 



Ostrya 112,183 



Virginica 29 



Outlet-Lock 21 



Over-cup Oak 112 



Oxalis 71,154 



comiculata, var. stricta 30 



Ox-eye 90 



Daisy 92 



Packages for exchange. How to make up. .233, 234 

 "When to send by mail and when by 



express 234 



Importance of doing up securely . . 234 



Pjepalanthusflavidus 13 



Pale Dock 108 



Indian Plantain 92 



Touch-me-not 71 



Yiolet 67 



Palma-Christi 110 



Palmer, 'William, Discovery by — 



of Nymphffia odorata 64 



of Quercus ilicifolia . 113 



of Asplenium angnstifolium 138 



Panic-Grass 135 



Panicled Hawkweed 93 



Panicum 135, 198 



depauperatum 50 



dichotomum 50 



discolor 13 



latifolium 5 



virgatum 50 



Pansy 67 



Papaver 64, 149 



Papaveracea) 52, 64 



Papaw 63 



Paper for exchange-packages 233 



Thin white, used in pressing plants. . 219 

 Importance of never removing the 



plants from the, till drj' 221 



Proper size for the 221 



Pardanthus 121,187 



Parietaria Ill, 182 



Pcnnsylvanica 24 



Page. 



Paronychia 69, 153 



dichotoma 22 



ParonychieiB 51 



Parsley Family 82 



Parsnip 82 



Partitions of the herbarium, Size of 225 



Partridge-berry 84 



Paspalum 134, 198 



distichum 13 



Passi flora 81, 161 



Passitloraceas 51, 81 



Passion-Flo wer 81 



Family 81 



Pastin.ica 51, 82, 162 



Patterson, Harry N 43 



Peach 76 



Pcarlwort 69 



Pedicularis 102, 176 



Canadensis 29 



Pellaea 138,199 



Pellia 143,206 



Pellitory Ill 



Peltandra 117, 185 



Pencil- Flower 74 



Pennycress 66 



Pennyroyal 105 



Pennywort 82, 98 



Penthorum 80, 160 



Pentstemon 101, 175 



Peppergrass 66 



Pepperidge 83 



Peppermint 104 



Percentages, Table of, in comparison of the 



local flora with seven other floras 44 



Perilla 104,177 



ocimoides, var. crispa 20 



Periwinkle 97 



Persea Carolinensis 13 



Persicaria 108 



Persimmon 96 



Peucedanum 51 



Phacelia 99,174 



Purshii 23 



Phasnogamia 61 



Phalaris 134,198 



arundinacea 13 



Phascum ^ 140,201 



Phaseolus 76,158 



Phegopteris 138,200 



hexagonoptera 50 



Philadelphus 79, 160 



Philosophical Society of Washington, Out- 

 line of the work presented to the 5 



Phleum 131,194 



Phlox 98,173 



divaricata 30, 32, 49 



maculata 25 



paniculata 49 



subulata 31 



Phoradendron HO, 181 



Phryma 103,177 



Phyllanthus 110,181 



Physalis 100,175 



lanceolata 13 



Physcomitrium 142, 203 



