384 Glossary 



LENTICEL. A special loose corky structure in plants 

 intended for the exchange of gases of the air and the 

 interior of the plant. 



LESIONS. A definite diseased area. 



M 



MACROCONIDIA. Large conidia. 

 MICROCONIDIA. Very small conidia. 

 MIDDLE LAMELLA. The connecting or cementing mem- 

 brane between any two cells of a plant. 

 MYCELIUM. Vegetative threads or hyphse of a fungus. 

 MYCOLOGY. The study of fungi. 



O 



OMNIVOROUS. Attacking a large variety of plants. 

 OOGONIUM. Female sexual organ of fungi, containing 



one or more oospheres. 

 OOSPHERE. Naked mass of protoplasm developing into 



oospores after fertilization. 

 OOSPORE. Fertilized oosphere. 



PAPILLATE. Having wing-like structures. 



PARAPHYSES. Sterile filaments found in some fruiting 



forms of fungi. 

 PARASITE. An organism living at the expense of another 



(the host). 



PATHOGENE. A disease-producing organism. 

 PEDICILLATE. Borne on a stalk. 



