INDEX. 



581 



HABEELAKUT. 



flaberlandt, Dr., oq the protube- 

 rance on the hypocotyl of Allium, 

 59 ; the importauoe of the arch 

 to Beedliug plants, 87 ; sub- 

 aerial and subterranean cotyle- 

 dons, 110, re.; the arched hypo- 

 cotyl, 554 



M^inat'Xylon Campecliianum, noc- 

 turnal movement of leaves, 368, 

 369 



Hed'ra helix, circumnutatioji of 

 stem, 207 



Hedysarum coronarium, nocturnal 

 movements of leaves, 356 



Hetiaidhemum proslratum, geotro- 

 pic movement of fluwer-heads, 

 618 



Uelianlhus annuus, circumnutation 

 of hypocotyl, 45 



, arching of hypocotyl, 90 



, nocturnal movement of coty- 

 ledons, 305 



Heliotropism, 5 ; uses of, 449 ; a 

 modified form of circumnutation, 

 490 



BeUebortis niger, mode of breaking 

 thrpugh the ground, 86 



Hensen, Prof, on roots in worm- 

 burrows, 72 ,, 



Henslow, Eev. G., on the coty- 

 ledons of ihalarii Canariensis, 

 62 



Hofmeister, on the curious move- 

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

 the leaves of Putia etratiutes, 

 255 ; of cotyledons at night, 297 ; 

 of petals, 414 



— — and Batalin on the movements 

 of the cabbage, 229 



Hooker, 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 Epicotyls, circum- 



nutation and other ^movements 

 when arched.98; power of straight- 

 ening themselves, 100; rupture 

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

 tratiou of, 106 ; circumnutation 

 when erect, 107; when in dark 

 108 

 Hyponasty, 6, 267 



I. 



Iberis unibellata, movement of stem, 

 202. 



Illumination, effect of, on the sleep 

 of leaves, 398 



Imatophyllum vel Clivia (sp. ?), 

 movement of leaves, 255 



Indigo/era tincioria, leaflets do- 

 pressed at niglit, 354 



Inheritance in plants, 407, 491 



Insectivorous and climbing plants 

 not heliotropic, 450 ; influence of 

 light on, 488 



Jpomcea bona nox, aroliing of hypo- 

 cotyl, 90 



, niicturnal position of coty- 



ledons, 306, 312 



ecerulea vcl Pharbitis nit, 



circumnutation of seedlings, 

 47 



, movement of cotyledons, 47- 



49, 109 

 , nocturnal movements of coty- 

 ledons, 305 



, sleep of leaves, 386 



, sensitiveness to light, 451 



, the hypoootyledonous stems 



heliotropic, 453 

 , cocdnea, position of coty- 

 ledons at night, 306, 312 



leptophylla, mode of breaking 



through tie ground, 83, 84 



, arching of the petioles of the 



cotyledons, 90 

 , difference in sensitiveness to 



gravitation in ditferent parts, 



509 

 , extraordinary manner of ger 



mination, 557 



