INDEX 



309 



Knot-grass (Polygonum) , 206, Fig. 

 49. 



Labiatae (Mint family), 214, 253. 



Labiatiflorae, 214, 215, 218, 219, Fig. 

 53. 



Laboulbeniaceae, 99. 



Lacunae (air-spaces), 140, 141, Fig. 

 36. 



Lady's-slipper (Cypripedium), 194, 

 Fig. 47. 



Lamina (of leaf), 201. 



Laminaria, 68. 



Lamium, 215, 253, 254, Fig. 53. 



Larcb (Larix) , 168. 



Larkspur (Delpbiuium), 207, 208, 

 247, Fig. 50. 



Laurel, 21, 230. 



Leaf, 10, 20, 21, 30, 69, 106, 107, 114, 

 115, 126, 129, 130, 131, 140, 145, 146, 

 149, 150, 160, 161, 162, 163, 167, 168, 

 183, 187, 193, 196, 201, 268, 290; 

 Cycads, 162, 163; Conifers, 167, 

 168; Equisetum, 140; Ferns, 130, 

 131 ; Isoetes, 150 ; Liverworts, 106, 

 107 ; Lycopods, 144, 145 ; Phaeophy- 

 ceae, 69; Sapropbytes, 196, 279; 

 Xerophytes, 271. 



Leaf-cutting ants, 261. 



Leaf-tendrils, 278. 



Leguminosae (Pea family), 204, 212, 

 231, 252, 280. 



Lejeunia, 106, Fig. 27. 



Lemna (see also " Duckweed "), 182, 

 185, 187, 270, Fig. 45. 



Lepidodendron, 147, 148, 155, 156, 

 172, 226. 



Leptosporangiatae, 133, 134, 135, 136, 

 137, 138, 146, 150, 154, 155, 156, 157, 

 224 ; distribution of, 136, 137, 138 ; 

 fossil, 138, 224; Sporangium, 134, 

 135, Fig. 35. 



Liana (see also "Creeper," " Climb- 

 ing plants"), 276. 



Lichens, 97, 98, 99, 100, 275, 276, 280. 



Life-history, as a clue to relation- 

 ships, 15. 



Light (influence on plant growth), 

 17, 23, 30, 262, 277, 282, 297. 



Lilac, 215. 



Liliaceae (see " Lily family "). 



Liliiflorae, 189, 192, Fig. 46. 



Lily, L. family, 189, 190, 191, 197, 

 198. 



Linaria, 215, Fig. 53. 



Liniu, 5. 



Linnrea, 230, 239. 



Lip (of Orchids), 194, 195, 254, 255. 



Liriodendron, 207, Fig. 50. 



Liverwort (see also " Hepaticae "), 

 29, 101, 102, 103, 106, 107, 108, 109, 

 111, 112, 113, 114, 115, 116, 119, 120, 

 121, 125, 126, 128, 129, 132, 137, 148, 

 153, 156, 157, 223, 273, 275, 276, 283, 

 289; embryo, 109, 129; fossil L., 

 223; leafy L., 106. 107, 114, 119; 

 thallose L., 106, 107, 112, 115, 119; 

 Figs. 26, 27, 31. 



Lizard, reproduction of lost parts, 

 25. 



Locomotion in plants, 282. 



Locust (Robinia), 24, 283. 



Loclicule, 185. 



Loranthus, 278. 



Lotus (Nelurnbo), 207, Fig. 50. 



Louisiana, 238. 



Lupine, 241, 280. 



Lycoperdon (see also "Puff-ball"), 

 95. 



Lycopod, Lycopodineae (see also 

 '"Club-moss"), 139, 143, 144, 145, 

 152, 155, 156, 157, 167, 175, 225, 292, 

 293; embryo of, 144, 145; fossil L., 

 147, 154, 155, 225, 226 ; gametophyte 

 of, 143, 144, 145; sporophyte, 146; 

 Figs. 37, 38. 



Lycopodiaceae, 143, 144. 



Lycopodium, 143, 144, 145, 146, 147. 

 *148, 152, 225; L. clavatum, 143; 

 L. dendroideum, 143, Fig. 37. 



Lygodium, 135, Fig. 35. 



M 



Macrocystis (see also " Giant Kelp "), 

 68. 



