1919] 
Hybanthus concolor, 87. 
Hydrangea, 103; arborescens, 102, 
103 
Hydrocotyle umbellata, 73. 
Hydrophila, 10. 
Hydrophyllum americanum, 200. 
Hypericum gentianoides, 19; punc- 
tatum, 200. 
Hypnea nigrescens, 207. 
Hystrix patula, 201. 
Ibidium, 10. 
Identity of Angelica lucida, 144. 
Tlex, 125; decidua, 189; glabra, 125; 
laevigata, 119, 126, forma Herveyi, 
126; monticola, 130; opaca, 126; 
verticillata, 126, forma chryso- 
carpa, 126, var. padifolia, 126, var. 
tenuifolia, 126. 
Ilysanthes dubia, 191. 
Impatiens, 99, 128; biflora, 99, 100, 
128, forma albiflora, 99, 128, forma 
citrina, 99; Further Notes on, 98, 
forma Peasei, 98, 99, forma platy- 
meris, 99, 100. 
Imperatoria lucida, 146. 
Indiana, Deam's Trees of, 188. 
Ioxylon, 190. 
Iris, 180; The History of the popular 
Name “Flower de luce" or 
‘© Pleur de s^ of the, 180; 
Pseudacorus, 180. 
Isoptera regularis, 204, 206. 
Isotachis, 156. 
Itea virginica, 119. 
Jack-pine, 46, 52. 
Jamesoniella, 152. 
Jasione, 106; montana, 105-107, a 
conspicuous Weed near Lakewood, 
New Jersey, 105. 
Juglans cinerea, 44; nigra, 87. 
Juncus, 75; brachycephalus, 56; 
' militaris, 75; pelocarpus, 73; se- 
. eundus, 19; stygius, 65. 
Jungermannia, 149, 152, 163; am- 
ee: 163; biformis, 149; 
cordifolia, 162 165; flaccida, 162, 
168; hyalina, 149, 150; obovata, 
162; Schmideliana, 149; sphaero- 
carpa, 163, 167, 168. 
Juniperus, 68; communis, 68; vir- 
^ giniana, 202 
Kalmia angustifolia, 119; 
189, 199. 
Kennedy, George Golding [Life of], 
25. 
latifolia, 
Index 227 
Knowlton, C. H., An Excursion to 
Mt. Washington, Massachusetts, 
and Bash-Bish Falls, 198; Field 
Trips of the New.England Botan- 
ical Club, 1919, 143; Plans for 
1919 Spring Field Trip of the New 
England Botanical Club, 86 Re- 
ports on the Flora of the Boston 
District,— XXX, 78, XXXI, 125. 
Koeleria, 216. 
Krigia virginica, 19. 
Labiatae, 170. 
Lady Fern, 175. 
Lakewood, New Jersey, Jasione mon- 
tana a conspicuous Weed near, 105. 
Laminaria saccharina, 207. 
Lamium amplexicaule, 170. 
Laportea canadensis, 200. 
Larix, 43; laricina, 191. 
Laurel Magnolia, 49. 
Laurencia botryoides, 204; obtusa, 
203, 204, 206; thuyoides, 204. 
Leathesia difformis, 205. 
Lechea major, 36. 
Leguminosae, 29, 170, 190. 
Lemnaceae, 87. 
Leontodon, 211; hispidus, 211. 
Lepidium virginicum, 170. 
Leptophyllum, 10, 11. 
Lespedeza, 8; frutescens, 202; pro- 
cumbens, 8. 
Leveillea bidentata, 206. 
Levisticum officinale, 199. 
Ligusticum actaeifolium, 145, 146. 
Lilies, Cow, 183. 184; Nympho- 
zanthus the correct Name for the 
Cow, 183; Water, 183. 
Lilium, 180. 
Lily, 180; Fairy, 75. 
Limodorum tuberosum, 119. 
Linaceae, 78. 
Linnaea, 31. s 
Linum, 78; medium, 78; striatum, 
78; suleatum, 78; usitatissimum, 
78; virginianum, 78. 
Liquidambar, 50, 190; styraciflua, 49. 
Liriodendron, 190; Tulipifera, 189. 
Listera convallarioides, 192. 
Lithological Factors limiting the 
Ranges of Pinus Banksiana and 
Thuja occidentalis, 41 
Littorella uniflora, 191. 
Lobelia cardinalis, 217, forma alba, 
218, var. alba, 218, 8 alba, 218. 
y candida, 218, forma rosea, 217, 
Two color Forms of, 217; inflata, 
170. 
