PREFACE. XXI 



tions, wliicli I drew up for my own guidance ; a simple 

 outline will suffice. 



Sections 1 and 2 hardly need any explanation ; Biography 

 consists entirely of works not given by Pritzel. Section 8, 

 Nomenclators, are practically lists of names, with indications 

 of the authors of them. Ante-Linnean Botany is divided into 

 three sections — Biblical, Classical, and what I have, for lack 

 of a better name, styled Early Modern. Section 13 consists 

 of Elementary Works, and here are most of the school-books, 

 continued in section 14, Lectures, and Wall Diagrams in the 

 following section. Physiological and Morphological Botany 

 is divided into many sections ; General Treatises being first re- 

 counted, we pass on to The Cell and its various contents, such 

 as Protoplasm, Chlorophyll, Starch, and similar compounds. 

 Next, what I have called Nutrition, and certain phenomena 

 of vitality, with the working of Heat, Light, Electricity on the 

 plant ; Growth, and the Motion of Fluids ; the Tissues and 

 Organs in General. JSText are ranged the Organs in Particular, 

 beginning at the Root and going on by the Axis, the Leaf with 

 its modifications, the Laticiferous vessels. Bud-formation, the 

 Bark with its appendages, the Stem and Inflorescence, this 

 last term being understood to include the flower itself, then 

 subdivided into the various parts of the flower, and its 

 chanees into the seed. Germination is treated of in section 

 31, and the carnivorous plants are included in section 32. 

 The phenomena of Reproduction are next considered, — 

 the Species question, Fertilization, with its attendant Hybri- 

 dization, and Accommodation to surrounding circumstances. 

 The development of Colour and special products are in 

 sections 37-8. Then follow Plant Diseases and monstrous 

 growths, which so greatly help our knowledge of the signifi- 



