COMMON GREEN MOULD. 



FIG. 1. Showing 



Dichotornously branched hypha (Gr. dichotomia, a division into two parts) subdivided by septa. 



Granular vaeuolated protoplasm in the cells. 



Aerial hypha, branching at its ends like a brush or pencil, hence the name Penicillium. 



The terminal branches, corresponding to the hairs of the brush, breaking up into stylo-conidiu 



(Gr. stulos, a stalk ; Jionis, dust). 

 FIG. 2. THE CONIDIA. Showing 



Size jig inch in diameter. 

 Form Spherical. 



I Wall. 

 Structure { Protoplasm. 



( Vacuole. 

 Germination 



a $ b. Eminence formed at one point of the conidium. 



c. Eminences formed at two points. 



d, e, fy f. Elongation and subdivision of the eminences by septa. 



Note. The ultimate result of the growth of the conidium ia to produce a Fenicillium like that in fig. 1. 



FIG. 3. Showing the SEXUAL PROCESS 



This has quite recently been made out, and occurs under peculiar conditions, as yet attained 

 only by artificial means. The male element or antheridium (Gr. antlios, a flower ; eidos, form) 

 is a short branch of a hypha, the female element or carpogonium (Gr. carpos, fruit ; gone, seed; 

 also a short branch coiled like a cork-screw. These two elements come together and exercise on 

 one another some reciprocal influence. A sexual process of this kind, where the conjugating 

 dements are different, is called Fertilization. As the result of fertilization a fruit or sporocarp 

 is produced, like a little pin-head. That fruit consists of an outer mass of sterile hypha! 

 enclosing a mass of fertile hyphse. These fertile hypha! are developed from the female element. 



FIG. 4. SECTION OF SPOEOCAEP (Gr. spora, a seed ; carpos, fruit) or FRUIT 

 Sterile tissue. 

 Fertile tissue in centre (red). 



FIG. 5. PORTION OF FERTILE TISSUE REMOVED FROM SPOROCARP. Showing 



a. Asci or cells containing spores (Gr. askos, a bag). 



b. An ascospore removed from an ascus. 

 FIG. 6. Showing GERMINATION OF ASCOSPORE. 



CLASSIFICATION OF PENICILLIUM. 



Kingdom Plante. 



Sub-Kingdom Thallophyta. 



Class Carposporero, because it possesses a sporocarp. 



Group Fungi. 



Order Ascomycetes, because of the asci. 



Genus Penicillium (L. penicillum, a painter's brush). 



Common Name Green Mould. 



