ILLUSTRATIONS. 



Paga 

 Concealment of Honey in Flowers, - - - 181 

 Examples of Colour-contrasts in Flowers, - - 184 

 Two New Zealand Haastias or" Vegetable Sheep" 



[Haastia pulvinaris and Sinclairii), - - 188 

 Colour-contrast in the flowers of the Bean ( Vicia 



Faha), 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 florida), - - - 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 lycoptfolia protected by Ants 



from the attacks of a Beetle, - - - 242 



Contrivances for loading insects with pollen, - 246 

 Longitudinal section through a flower of the 



Evening Primrose {(Enothera 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 tridentatum, - , - - - 269 



Flower of Pedicxdaris recutita, .... 272 

 Sprinkling apparatus of various plants, - - 273 



Sprinkling apparatus, ..... 275 



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), 285 

 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 21st classes of 



the Linnean System, .... - 293 



Type of a monoecious plant: Common Oak 



(Quercus pedunculata), .... 298 



Tyi>e of a dioecious plant: Crack Willow (Salix 



fragilis), 



Heterostyled flowers : Primrose and others, 

 Change of Position of Anthers and Stigmas. 

 Flower of the Rue {Ruta graveolens), - 

 Completely dichogamous Flowers [Geranium. 



Parietaria), .... 



Dichogamy in Saxifraga rotundifolia, 

 Incompletely dichogamous Flowers {Epilobium, 



Eremurus), .... 



Geitonogamy with adherent pollen, - 

 Geitonogamy with dust-like pollen, . 

 Autogamy effected by the inclination of curved 



stamens, ....... 



Autogamy effected by inclination of curved 



stamens {Circaa, Agrimonia), 

 Autogamy brought about by elongation of the 



the pistil (Epimedium alpinum), - 

 Autogamy effected by means of an inflection o 



the style, ...... 



Autogamy in the flowers of the Willow-herb 



(Epilobium angustifolium), - 

 Autogamy by means of spiral twistings of stamens 



and style, ..... 

 Autogamy by means of a crossing or a bending 



back of the style-branches, - 

 1 Autogamy effected by means of an inflection o: 



the style-branches (Arnica, Senecio), - 

 Autogamy effected by tlie petals, 

 Autogamy effected by means of the corolla (Gen 



tiana asclepiadca), ..... 

 Autogamy effected by means of the corolla (Pedl 



cularis incarnata), ..... 

 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, 

 Autogamy caused by the combined inflections of 



pedicel and stamen-filaments: Pyrola unijora, 

 Autogamy through inflection of the pedicel and 



disarticulation of the corolla : Phygelius 



capensis, 



Autogamy resulting from an inflection of the 



pedicel accompanied by spiral torsion of the 



filaments: Cobcea scandens, .... 

 Autogamy resulting from inflection of the pedicel 



combined with inclination of the style to the 



place where the pollen has been deposited: 



Alliuvi Chamcemoly, ..... 

 Autogamy resulting from inflection of the pedicel 



combined with the folding up of the corolla : 



Gentiana Clusii, ...... 



Development of Pollen. tubes in Lilium Martagon 



and Averia elatior, ..... 

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



(ffelianthcinuin marifoliuin), 

 Chalazogamic fertilization in the Hornbeam (Car- 



pinus Betulus), ...... 



Page 



299 

 302 

 305 

 306 



307 

 308 



309 

 320 



342 



343 



349 



851 



354 



357 



360 



363 

 369 



372 



375 



388 

 409 

 411 

 412 



