Kraus, Dr. Carl, on the underground shoots of Triticum repens, 189; on
Cannabis sativa, 250, 307, 312; on the movements of leaves, 318
L.

Lactuca scariola, sleep of cotyledons, 305

Lagenaria vulgaris, circumnutation of seedlings, 42 —­, of cotyledons, 43 —­, cotyledons vertical at night, 304

Lathraea squamaria, mode of breaking through the ground, 85
—­, quantity of water secreted, 85, 86, n.

Lathyrus nissolia, circumnutation of stem of young seedling, 33 —­, ellipses described by, 107, 108

Leaves, circumnutation of, 226-262; dicotyledons, 226-252; monocotyledons, 252-257; nyctitropism of, 280; their temperature affected by their position at night, 294; nyctitropic or sleep movements, 315, 394; periodicity of their movements inherited, 407; embryology of, 414; so-called diurnal sleep, 445

Leguminosae, sleep of cotyledons, 308; sleeping species, 340

Le Maout and Decaisne, 67

Lepidium sativum, sleep of cotyledons, 302

Light, movements excited by 418, 563; influence on most vegetable tissues, 486; acts on plant as on the nervous system of animals, 487

Lilium auratum, circumnutation of stem, 212
—­, apogeotropic movement of stem, 498, 499

Linnaeus, ‘Somnus Plantarum’, 280; on plants sleeping, 320; on the leaves of Sida abutilon, 324; on Oenothera mollissima, 383

Linum Berendieri, nocturnal movement of cotyledons, 298
—­ usitatissimum, circumnutation of stem, 203

Lolium perenne, joints affected by apogeotropism, 502

Lonicera brachypoda, hooking of the tip, 272
—­, sensitiveness to light, 453

Loomis, Mr., on the movements in the fruiting fronds of Asplenium trichomanes, 257

Lotus aristata, effect of radiation on leaves, 292
—­ Creticus, leaves awake and asleep, 354
—­ Gebelii, nocturnal movement of cotyledons, 308
—­, leaflets provided with pulvini, 353
—­ Jacobaeus, movements of cotyledons, 35, 109
—­, pulvini of, 115
[page 583]

LOTUS—­MELILOTUS

Lotus Jacobaeus, movements at night, 116, 121, 124 —­, development of pulvini, 122 —­, sleep of cotyledons, 308, 313 —­, nyctitropic movement of leaves, 353 —­ major, sleep of leaves, 353 —­ perigrinus, movement of leaflets, 353

Lunularia vulgaris, circumnutation of fronds, 258

Lupinus, 340
—­ albifrons, sleep of leaves, 344
—­ Hartwegii, sleep of leaves, 341
—­ luteus, circumnutation of cotyledons, 38, 110
—­, effect of darkness, 124

Lupinus, position of leaves when asleep, 341 —­, different positions of leaves at night, 343 —­, varied movements of leaves and leaflets, 395 —­ Menziesii, sleep of leaves, 343 —­ mutabilis, sleep of leaves, 343 —­ nanus, sleep of leaves, 343 —­ pilosus, sleep of leaves, 340, 341 —­ polyphyllus, sleep of leaves, 343 —­ pubescens, sleep of leaves by day and night, 342 —­, position of petioles at night, 343 —­, movements of petioles, 401 —­ speciosus, circumnutation of leaves, 236