ILLUSTRATIONS. 



IX 



Page 

 Concealment of Honey in Flowers, - - - 181 

 Examples of Colour-contrasta in Flowers, - - 184 

 Two New Zealand Haastias or " Vegetable Sheep " 



{Haastia pulvinaris and Sinclairii), - - 188 

 Colour-contrast in the flowers of the Bean ( Vicia 



Faba), 189 



Narcissus [Narcissus poeticus), showing colour- 

 contrast, .---... 190 

 Preparation of Flowers for Insect-visits in the 



Laburnum (Cytisus Laburnum), - ■ - 223 

 Arrangements for the reception of Insects at the 



entrance to the Flower, ... - 226 

 Arrangements for the reception of Insects at the 



entrance to the Flower, .... 227 

 Wood Anemone (Anemone nemorosa), - ■ 229 



American Dogwood [Cornus jiorida), - • - 231 

 Sticky glands as a protection to Flowers, - - 236 

 Sticky Bristles at the edge of the Calyx as a pro- 

 tection to Flowers, - . - . . 237 

 Tufts of Hair as a Protection to Flowers, - - 240 

 Capitula of Serratula lycopifoUa protected by Ants 



from the attacks of a Beetle, - - - 242 



Contrivances for loading insects with poUen, - 246 

 Longitudinal section through a flower of the 



Evening Primrose (CEnothera biennis), - 247 



Contrivances for ensuring the deposition of pollen 



on insect-visitors, - . - - . 249 



Withdrawal and deposition of pollinia in the 



flowers of an Orchid, . - - - - 255 

 Clip-mechanism for fastening the pollinia of As- 



clepias Cornuti to the feet of insects, - - 258 

 Apparatus for pumping pollen on to the bodies of 



insects, -..-.-- 261 

 Transference of pollen to the bodies of insects by 



means of mechanism of the percussive type, 262 

 Explosive apparatus for the transfer of pollen to 



the bodies of insects, ----- 265 

 Explosive apparatus in a papilionaceous flower, - 266 

 Transference of pollen to the bodies of insects by 



means of explosive apparatus, - - - 267 

 Expulsive apparatus in Orchid-flowers : flower of 



Catasetum tridentatwm, . - - - 269 



Flower of Pedicularis recutita, - - - - 272 

 Sprinkling apparatus of various plants, - - 273 

 Sprinkling apparatus, - . . . . 276 



Arrangements for the Retention of the deposited 



Pollen, - - 279 



Deposition of the Pollen in Mimulus luteus, ■ 280 

 Evening Primrose (CEnothera biennis), - - 282 

 Calabar or Ordeal Bean (Physostigma venenosum), 28;i 

 Types of the 1st to 10th classes of the Linnean 



System, 289 



Types of the 13th, 14th, 15th, 16th, 18th, and 20th 



classes of the Linnean System, - - - 292 

 Types of the 11th, 12th, 17th, and 2l3t classes of 



the Linnean System, 293 



Type of a monoecious plant; Common Oak 



{ Quercus pedunculata), - - ■ - 298 



Type of a dioecious plant: Crack Willow (Salix 



fragilis), 299 



Heterostyled flowers : Primrose and others, - 302 



Change of Position of Anthers and Stigmas, - 305 



Flower of the Rue (JRuta graveolens), - ■ - 306 



Completely dichogamous Flowers (Geranium, 



Parieiaria), ...... 307 



Dichogamy in Saxifraga rotundifolia, - - 308 



Incompletely dichogamous Flowers (Epilobium, 



Eremurus), ...... 309 



Geitonogamy with adherent pollen, ... 320 



Geitonogauiy with dust-like pollen, • - - 329 



Autogamy effected by the inclination of curved 



stamens, ------- 342 



Autogamy effected by inclination of curved 



stamens (Circcsa, Agrim^onia), - - - 343 



Autogamy brought about by elongation of the 



the pistil (Epimedium alpinum), - - - 349 



Autogamy effected by means of an inflection of 



the style, 351 



Autogamy in the flowers of the Willow-herb 



(Epilobium angusti folium), . . . . 354 



Autogamy by means of spiral twistings of stamens 



and style, --.-... 357 



Autogamy by means of a crossing or a bending 



back of the style-branches, - . . . 360 



Autogamy effected by means of an inflection of 



the style-branches (Arnica, Seneclo), ■ ■ 363 



Autogamy effected by the petals, - - - 369 



Autogamy effected by means of the corolla (Gen- 



tiana asclepiadea), - . . . . 372 



Autogamy efltected by means of the corolla (Pedi- 

 cularis incarnata), . . . . . 375 



Autogamy caused by inflection of the flower-stalk 

 and the adjustment of the under-lip to form 

 an inclined plane down which pollen slides 

 to the stigma: Calceolaria Pavonii, - - 380 



Autogamy caused by the combined inflections of 



pedicel and stamen-filaments: Pyrola unijiora, 383 



Autogamy through inflection of the pedicel and 

 disarticulation of the corolla : Phygelius 

 capensis, ....... 384 



Autogamy resulting from an inflection of the 

 pedicel accompanied by spiral torsion of the 

 filaments: Cohwa scandens, - - - - 385 



Autogamy resulting from inflection of the pedicel 

 combined with inclination of the style to the 

 piaoe where the pollen has been deposited: 

 Allium Chavieemoly, ----- 386 



Autogamy resulting from inflection of the pedicel 

 combined with the folding up of the corolla : 

 Gentiana Clusii, ------ 388 



Development of Pollen-tubes in Lilium Martagon 



and Avena elatior, . . . . . 409 



The course of the pollen-tubes in a Rock-rose 



(Helia.ntheTnum Tnarifolium), - - - 411 



Chalazogamio fertilization in the Hornbeam (Car- 



pinus Betulus), ------ 412 



