Extension Wokk in Hoeticultuee. 189 



3. Office of the jpoU €71. — The pollen-grain germinates by sending 



out a minute tube, which grows down through the pistil, 

 finally entering the ovary to fertilize the egg-cell. How 

 fecundation takes place. 



4. Close-fertilization and cross fertilization. — The most healthy 



and hardy seed is borne by the plant whose flowers have 

 been fertilized by pollen from a different plant. 



5. Some devices of plants to insure cross fertilization. — The 



stamens and pistils may be borne in different plants, e. g. 

 Maples and Willows. The stamens may mature before the 

 pistils on the same plant, e. g. Sunflower, Pollen may be 

 impotent when applied to the pistil of the same plant, or of 

 the same variety, as in some varieties of fruits. The case of 

 Pears. Special devices to insure fertilization. 



6. The agency of insects in cross fertilization. — Why flowers are 



colored. The office of nectar (honey). Importance of bees 

 in orchards. Some flowers fertilized by special insects, e. g. 

 clover. Some adaptations of insects for carrying pollen. 



Fitngi and Fungous Diseases. 



(Given at the Jamestown School.) 



(By E. G. Lodeman.) 

 I. Bacteria. 



What are they ? 

 Some of their characters. 

 Effects upon plants. Pear-blight. 

 Methods of treatment. 



Methods of study in the laboratory. Illustrated by speci- 

 mens and photographs. 



II. Fungi Proper. 



The principal groups, respecting their habit of life : 



1. Feeding upon living tissues (Parasites). 



2. Feeding upon injured or dying tissue. 



3. Feeding upon dead tissue (Saphrophytes). 

 Consideration of the first group (Parasites). 



How they injure plants; 1, by growing on the surface of 

 host plant ; 2, by growing within the tissue of the host. 



