INDEX. 



25T 



Page. 



Population in 1830 and 1880 of Virginia 15 



Popiilua - 116, 1.^'4 



alba 20,28 



grandidentata 29 



heterophylla 13 



monilifera 30 



tremuloides 13 



Portfolio, how it sliould be made 213 



Pretended improvements in the . . 213 



Kind of paper best for the 214, 217 



Devices for holding plants firmly 



in the 214 



Directions for filling the 216, 217 



Portulaca 69,153,222 



Portiilacaceae 51, 69 



Postal laws, Unnecessary stringency of, in 

 forbidding the transmission of partially 



written labels with specimens 234 



Post-Oak 112 



Potamogeton 118, 185 



Claytonii 24 



diversifolium 13 



fluitans 13 



hybridus 23 



pauciflorus - . 23 



Potentilla 78,159 



Canadensis 30, 49 



Poterium 78, 159 



Canadense 25 



Sanguisorba 10 



Potomac-Side Naturalists' Club, Catalogue 



published by the 16 



Pottia 141,202 



Poverty-Grass '. 131 



Prairie Willow 116 



Prenanthes 53, 93 



Preservation of Plants 218 



should not be begiin 



too soon 210 



Press, how made 219 



Pressing plants, Directions for 219 



Pressure, Degree of, best for plants 220 



how applied 220 



how long it should be continued. . 221 

 Plants that will not bear much. . . 222 



Prickly Ash 71 



Pear 81 



Primrose Family 96 



Primrose-leaved Violet C7 



Primulaceas 96 



Prince's Feather . . . : 108 



Pine 95 



Proceedings of the American Academy of 

 Arts and Sciences, Kevlsions, &c., pub- 

 lished in the 52 



Prodromus Florie Columbiana;, 



Plants in the, how designated in the 



catalogue 11,59 



plants enumerated in the, but not now 



found. List of 12 



Classification of the 14, 15 



Plants enumerated in the, but not iden- 

 tified 13 



Probable errors of the 15, 16 



Number of synonyms in the 16 



Page, 

 Prodromus Florte Colnmbianae, 



Number of plants now found but not 



enumerated in the 17" 



Proserpinaca 80, 161 



Prunus 76, 158 



Ptelea 71,154 



Pteris 138,200' 



aquilina 50' 



Pterocaulon py cnostachy um 12 ' 



Ptilidium 144, 266^ 



Public Schools, Study of botany in the 57 



Puccoon 99 



Pulse Family 73 



Purple Azalea 49, 95 



Gerardia 102- 



Meado w-Rue 6V 



Milkweed 97- 



Thorn- Apple 101 



Willow 11& 



Purplish Cudweed S* 



Purslane 6» 



Family 69" 



Speedwell 102- 



" Pussley " GS' 



Putty-root 120^ 



Pycnanthemum 104, 178 ■ 



aristatum 13 - 



incanum :. 49^' 



lanceolatum 24 



linifolium : 49 ' 



Torreyi 21,23: 



Pylaisffia 142,204 



Pyrola 95, 17I'. 



elliptica 21 



secunda 21 ' 



Pyrus 51'. 



Quamoclit lOO' 



Quercitron 113- 



Quercua 112, 183 



alba 4S- 



coccinea 48 



falc.ata 48 



ilicifolia 238 ■ 



macrocarpa 24 



palustris ,- 48: 



Systematic position of. . . 525: 



prinoides 25" 



Prinus 4S; 



Quick-Grass 134! 



Quitch-Grass 13* 



Eabbit-foot Clover 74' 



Kacomitrium 141, 203 



Kadish 66 



Radula 143,206- 



Ragged Fringed Orchis 119' 



Ragweed 90» 



Ragwort 92 



Ramsted ../ 101 



Range of the local flora 10 



RanunculacesB 61 



Ranunculus 62, 148; 



abortivus 29 



var. micranthus 29, 32 



ambigens 26 



