INDEX 



309 



Knot-grass (Polygonum), 206, Fig 

 49. 



Labiataj (Mint family), 214, 253. 



Labiatiflorse, 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. 



Larch (Larix), 168. 



Larkspur (Delpliinium) , 207, 208, 

 247, Fig. 50. 



Laurel, 21, 230. 



Leal, 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 ; Phseophy- 

 ceae, 69; Saprophytes, 196, 279; 

 Xerophytes, 271. 



Leaf-cutting ants, 261. 



Leaf-tendrils, 278. 



LegumiuosEe (Pea family) , 204, 212, 

 231,' 252, 280. 



Lejeonia, 106, Fig. 27. 



Lemna (see also " Duckweed ") , 182, 

 185, 187, 270, Fig. 45. 



Lepidodendron, 147, 148, 155, 156, 

 172, 226. 



Leptosporangiatie, 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. 



Liliacese (see " Lily family "). 



Liliiflorse, 189, 192, Fig. 46. 



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

 198. 



Linaria, 215, Fig. 53. 



Linin, 5. 



Linnsea, 230, 239. 



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



Liriodendro'n, 2ii7, Fig. 50. 



Liverwort (see also " Hepaticse"), 

 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. 



Lodicule, 185. 



Lorauthus, 278. 



Lotus (Nelumbo), 207, Fig. 60. 



Louisiana, 2.38. 



Lupine, 241, 280. 



Lycoperdon (see also "Puff-ball"), 

 95. 



Lycopod, LycopodincEe (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, 140 ; sporophyte, 146 ; 

 Figs. 37, 3S. 



Lycopodiaceai, 143, 144. 



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

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

 L. dendroiiieum, 143, Fig. 37. 



Lygodium, 135, Fig. 35. 



M 

 Macrocystis (see also ' ' Giant Kelp "), 



