250 



INDEX. 



Page. 



Herbarium work, General remarks on 235 



Herb Bonnet 77 



Herbert, Mrs. U. H., Specimens of Anagallis 



arvensis received from 96 



Herbs, How to collect 212 



Hercules' Club 83 



Localities for 20 



Herd's-Grass 131 



Hei-pestis 101,175,222 



nigrescens 22 



Hcsperis 66, 151 



matronalis 20 



Heteranthera 124, 189 



Heuchera 79, 160 



villosa 12 



Hexagon Beech-Fern 138 



Hibiscus 70, 154 



Hickory 48,111,112 



Hieracium 93,170 



Gronovii 49 



venosum 49 



High Island 22 



Mallow 70 



Hill, Dr. G. W., Discovery by, of Cypripe- 



dium parviflorum 120 



Hi])puris vulgaris 12 



Hoarhound 106 



Hoary Pea 74 



Puccoon 99 



Hog Peanut 76 



Hog-weed 90 



Holcus 134, 198 



Holly 71 



Family 71 



Holmead Swamp 25 



Holmes Run 24 



Honewort 82 



Honey-Locust 76 



Thorns of, as dissecting nee- 

 dles 211 



Honeysuckle 84 



Family 83 



Hooked Crowfoot 62 



Hop 110 



Hop-Clover 74 



Hop-Hornbeam 112 



Hopkins, G. M., Atlas of 18 



Hop-Tree 71 



Hornbeam 112 



Homwort 117 



Family 117 



Hor.se-balm 104 



Horse-Gentian 84 



Horse-Mint 105 



Horse-Ncttlo 100 



Hor.se-Kadish 05 



Horse-Sorrel 109 



Horsetail 137 



Family 137 



Horse- weed 89 



Hough, M. B. "W., Discovery by, of Liparis 



LccscHi 120 



Hound's Tongue 99 



Houstonia 84, 163 



cserulea 28,32,49 



Page. 



Houstonia purpurea 32, 49 



var. angustifolia 32 



Huckleberry 94 



High bush 49 



Humboldt on the relative influence of the 

 vegetable kingdom in giving character to 



a landscape 47 



Humulus 111,182 



Hunting Creek 24 



Hybrid Oaks, Localities of 21 



Hydrangea 79, 160 



arborescens 33 



Enlarged outer petals of 33 



radiata 12 



Hydrocharidaceaj 119 



Hydrocotyle 82, 161 



Hydrophyllacese 99 



Hydrophyllum , ... 99, 174 



HypericacesB 51, 69 



Hypericinese 51 



Hypericum 51, 70, 153 



aureum 12 



galioides 12 



myrtifolium 12 



Hypnum 142,204 



Hypoxys 120,187 



Ice-gorges of the Potomac, Effects of, on 



the vegetation 22 



Identification of plants 210 



Ilex 71, 154 



Ilicineae 71 



lllecebraceas 52, 69 



Illinois, Flora of 42,45 



Ilysanthes 102,176 



Impatiens 71, 154 



fulva 49 



pallida 49 



Impostures under the name of patent port- 

 folios 213 



Index 2.39 



Indian Bean 103 



Cucirmber 122 



Currant 84 



Fig 81 



Grass 136 



Hemp 97 



Physic 77 



Pipe 96 



Plantain 92 



Rice 130 



Tobacco 94 



Turnip 50, 117 



India-rubber bands, Convenience of 214 



Indigo 73 



Individuals, Number of, rather than of spe- 

 cies determines the character and value of 



a flora..- 48 



Insane Asylum 24 



Insect pests of the -herbarium. Habits of 



the 224 



Introduced species 35 



Number of, from all 



sources 35 



