ILLUSTRATIONS. 



FROM ORIGINAL DRAWINGS BY E. HEYN, B. V. RANSONNET, J. SEELOS, F. TBUCHMANN, 



0. WINKLER, AND OTHERS. 



Ferns and their spore-cases, &a, 



Horse-tails (Equiseta), . - - . - 



Mosses and their fructification, - 



Swarm-spores of Saprolegniaceffi and Chytri- 



diaceas, ------- 



Moulds and their fructification, . - - - 



Discomycetes (Morel and other Fungi), 



Basidiomycetes (various Fungi), 



Thallidia of Muscinete or Mosses, 



Formation of Thallidia in the cells of Hydro- 



dictyon and in those of Pediastruvi^ 

 Hdwingia ruscifiora, with flowers seated upon the 



foliage-leaves, ------ 



Formation of Buds on the apices of the Fronds of 



Ferns: Asplenium Fdgetcorthii, - 

 Formation of Buds on Fronds and Foliage-leaves, 

 Fertilization and fruit-formation in Ulothrix 



zonata (partly after Dodel-Port), 

 Fucus vesiculosus (Bladder-wrack), various sec- 

 tions, ------- 



Fucus vesiculosus, do. do.. 



Fertilization and fruit- formation in Mucorini, 



SiphonacecE, and Florideos, - - - - 



Fertilization, fruit-formation, and spore-formation 



in the Peronosporete, - - - - - 

 Fruit-formation in Stoneworts (Characese), 

 Structure of Phanerogamic Ovaries : various ex- 

 amples in section and otherwise, - 

 Structure of Phanerogamic Ovaries 



amples in section and otherwise, 

 Structure of Phanerogamic Ovaries 



amples in section and otherwise, 

 Structure of Phanerogamic Ovaries 



amples in section and otherwise, - 

 Antholysis and Structure of the Ovary, 

 Ovules and Foliaceous Carpels, - - - - 

 Stamens of double and monstrous flowers, - 

 Stamens, numerous examples, . - - - 



Curved anthers in the flower of Phyllanthus Oy- 



clanthera (after Baillon), - - - - 



iitamens, numerous examples, - . - . 



Pollen-grains, fourteen varieties, 

 Pollen-grains, nine varieties, . . . - 

 PoUen-grains and pollen-tetrads united by threads 



of viscin, ------- 



various ex- 



various ex- 



various ex- 



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Page 

 Protection of Pollen from Wet in Sea-buckthorn, 



&c., 109 



Protection of Pollen from Wet in Globe-flower, 



Digitalis, &c., 110 



Protection of Pollen from Rain, - ■ - - 112 



Protection of Pollen in Crocus multifidus, - - 113 



Protection of Pollen in Carlina acavZis, • - 117 

 Protection of Pollen in Herb-Robert, Bell-flower, 



Scabious, ------- 121 



Protection of Pollen in various plants, - - 125 

 Flowers of Vallisneria spiralis floating on the 



surface of water, ----- 132 

 The common Alder {Alnus glutinosa) and its 



flowers, 135 



The Paper Mulberry-tree [Broussonctia papyri- 



fera), - - 137 



The Ash (Fraxinus excelsior) and its flowers, - 138 



Flowers of Avena elatior, - - - - - 139 

 The Elm (Ulmus campestris) with its flowers and 



seed vessels, ---.,. 143 



Flowers, &c., of Mountain Pine (Pinus Pumilio), 144 



Male Flowers of Yew {Taxus baccata), - - 145 



Hazel (Corylus Avellana) with flowers and fruits, 147 

 Curled Pondweed (Potamogeton crispus) in the act 



of pollination, ...-.- 143 



Flowers oi Airo\v-gia,ss {Triglochin palustre), • 149 

 The Nottingham Oatchfly {Silene nutans) in the 



daytime, - - - - ■ - - - 154 

 The Nottingham Oatchfly {Silene nutans) by night; 



a flower being visited by a moth, - - 155 



Transport of Pollen by Egg-laying Insects, - 157 

 Arum conocephaloides, with the front wall of the 



spathe removed, ------ 154 



Flower of Birthwort (Aristolochia ringens), - 166 

 Honeyless Flower of Argemone Mexicana with 



abundant pollen, - - - - - 168 



Flowers of the Snowflake (Leucojum vernum), - 170 



Honey-secreting tissue in flowers, - - - 173 



Nectaries in several flowers, - - - - 174 



Flower of the Snowdrop (Galanthus nivalis), - 176 

 Flower of Narcissus (Narcissus Pseudonarcis- 



s«s). - - 177 



Flowerof the Wild Valerian ( Valeriana officinalis), 



cut through longitudinally, - - - - 173 



Concealment of Honey in Flowers, - - - 180 



