ILLUSTRATIONS. 



FROM ORIGINAL DRAWINGS BY E. HEYN, E. v. RANSONNET, J. SEELOS, F. TEUCHMANN, 

 0. WINKLER, AND OTHERS. 



Page 

 11 

 14 

 15 



Ferns and their spore-cases, &c., 

 Horse-tails (Equiseta), . - - - 

 Mosses and their fructiiication, - 

 Swarm-spores of Saprolegniacese and Chytri 



diacese, 



Moulds and their fructification, - 



Discomycetes (Morel and other Fungi), 



Basidiomycetes (various Fungi), 



Thallidia of Muscinese or Mosses, 



Formation of Thallidia in the cells of Hydro 



dictyon and in those of Pediastrum, - 

 Helwingia rusciflora, with flowers seated upon the 



foliage-leaves, . - - - - 

 Formation of Buds on the apices of the Fronds of 



Ferns: Asplenium Edgeworthii, • 

 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 Floridece, - 

 Fertilization, fruit-formation, and spore-formation 



in the Peronosporese, . - - - 

 Fruit- formation in Stoneworts (Characeis), 

 Structure of Phanerogamic Ovaries ; various ex 



amples in section and otherwise, - 

 Structure of Phanerogamic Ovaries : various ex 



amples in section and otherwise, - 

 Structure of Phanerogamic Ovaries: various ex 



amples in section and otherwise, - 

 Structure of Phanerogamic Ovaries: various 



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 Cy 



clanthera (after Baillon), - - - 

 idtamens, numerous examples, - 

 Pollen-grains, fourteen varieties, 

 Pollen-grains, nine varieties, 

 Pollen-grains and pollen-tetrads united by threads 



of viscin, ------- 101 



41 



50 



51 



73 



Protection of Pollen from Wet in Sea-buckthorn, 



&c., 



Protection of Pollen from Wet in Globe-flower 



Digitalis, &c., ----- 

 Protection of Pollen from Eain,- 

 Protection of Pollen in Crocus multifidus, - 

 Protection of Pollen in Carlina acavZis, 

 Protection of Pollen in Herb-Robert, Bell-flowe 



Scabious, ------ 



Protection of Pollen in various plants. 



Flowers of Vallisneria spiralis floating on the 



surface of water, . - . - 



The common Alder {Alnus glutinosa) and its 



flowers, ------ 



The Paper Mulberry-tree (Broussonctia papyri 



fera), ------- 



The Ash {Fraxinus excelsior) and its flowers. 

 Flowers of Avena elatior, - - - - 



The Elm (Ulvius campestris) with its flowers anc 



seed vessels, -.-.-• 



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

 Male Flowers of Yew (Taxus baccata), 

 Hazel (Oorylus Avellana) with flowers and fruits. 

 Curled Pondweed {Potaviogeton crispus) in the act 



of pollination, . - - - - 

 Flowers of Arrow-grass (Triglochin palustre), 

 The Nottingham Catchfly (Silene nutans) in tl: 



daytime, .-.--- 

 The Nottingham Catchfly (Silene nutans) by night 



a flower being visited by a moth. 

 Transport of Pollen by Egg-laying Insects, 

 Arum conocephaloides, with the front wall of th 



spathe removed, - - - - - 

 Flower of Birthwort (Aristolochia ringens), 

 Honeyless Flower of Argemone. Mexicana with 



abundant pollen, . . - - 



Flowers of the Snowflake (Leucojum vernwu). 

 Honey-secreting tissue in flowers, 

 Nectaries in several flowers, ... 

 Flower of the Snowdrop (Galanthus nivalis), 

 Flower of Narcissus (Narcissus Pseudonarcis 



sus), ------- 



Flower of the Wild Valerian ( Valeriana officinalis), 



cut through longitudinally, - 

 Concealment of Honey in Flowers, 



110 

 112 

 113 

 117 



121 

 125 



132 



135 



137 

 133 

 139 



143 



144 

 145 



147 



148 

 149 



155 

 157 



164 

 166 



168 

 170 

 173 

 174 

 176 



177 



178 

 180 



