INDEX. 



581 



HABEULANUT. 



H. 



flaberlandt, Dr., on the protube- 

 rance on the hypocotylof Allium, 

 59 ; tlie importance of tlie arch 

 to seedling plants, 87 ; sub- 

 aerial and subterranean cotyle- 

 dons. 110, n. ; the arched hypo- 

 cotyl, 554 



Hxmati.xylon Campecliianum. noc- 

 turnal movement of leaves, 368. 

 389 



Hedt-ra helix, circuinnutation of 

 stem, 207 



Hedysarum coron<irinm, nocturnal 

 movements of leaves, 356 



Helianthemum prostratum, geotro- 

 pic movement of flower-heads, 

 518 



Helianthus annuus, circuinnutation 

 of hypocotyl, 45 



, arching of hypocotyl, 90 



, nocturnal movement of coty- 

 ledons, 305 



Heliotropism, 5 ; uses of, 449 ; a 

 modified form of circumiiut.ition, 

 490 



Hellebores niger, mode of breaking 

 through the ground, 86 



Hensen, Prof., on roots in worm- 

 burro \vs, 72 



Henslow, Rev. G., on the coty- 

 ledons of / halaris Cduariensis, 

 62 



Hofmeister, on the curious move- 

 ment of Spirogyra, 3, 259, n. ; of 

 the leaves of Pi*tia tfrntiotes, 

 255 ; of cotyledons at night, 297 ; 

 of petals, 414 



and B'italin on the movements 

 of the cabbage, 229 



J looker, Sir J., on the effect of light 

 on the pitchers of Sarracenia, 

 450 



Hypocotyl, 5; manner of break- 

 "ing through the ground, 77 ; 

 emerges under the form of an 

 arch, 553 



Hypocotyls and Kpicotyls, circuui- 



nutation and other movements 

 when arched.98; power of straight- 

 ening themselves, 100; rupture 

 of the seed-coats, 102-106 ; illus- 

 tration of, 106 ; circiimnutatio:i 

 when erect, 107; when in dark 

 108 

 Hyponasty, 6, 267 



I. 



Iberisumbellata, movement of stem 



202. 

 Illumination, effect of, 0:1 the sleep 



of leaves, 398 

 Imatophyllum vel Clivia (sp. ?), 



movement of leaves, 255 

 Indigo/era tincloria, leaflets de- 

 pressed at night, 35i 

 Inheritance in plants, 407, 491 

 Insectivorous and climbing plants 



not heliotiopic, 450 ; influence of 



light on, 488 

 Ipoiwea ionu nox, arching of hvpo- 



cotyl, 90 

 , nocturnal position of coty. 



ledons, 306,312 



ccerulea vcl J'harbilis nil, 



circumuutation of seedlings, 

 47 



, movement of cotyledons, 47- 



49, 109 



, nocturnal movements of coty- 

 ledons, 305 



, sleep of leaves, 386 ' 



, sensitiveness to light, 451 



, the hypocotyledonous stems 



heliotropic, 458 



, coccinea, position of coty- 

 ledons at night, 306, 312 



leptophylla, mode of breaking 



through tl.e ground, 83, 84 



, arching of the petioles of the 



cotyledons, 90 

 , difference in sensitiveness to 



gravitation in different parts, 



509 

 , extraordinary manner of gor 



ruination, 557 



