CARPOASC1. 123 



conidiophores. These branch at their summits and bear flask- 

 shaped cells from which the conidia are abstricted. The ascocarps 

 which, both in size and colour, resemble grains of sand, have only 



FIG. 111. Penicillium crustaceum : a conidia (x 300) ; b germination of conidia; c small 

 portion of mycelium, produced from a conidium at *, with five conidiophores; d young 

 conidiophore ( x 630), a flask-shaped cell is abstricting a conidium; e the same conidio- 

 phore after 9-10 hours. 



FIG. 112. Penicillium crustaceum : a two spirally-coiled byphae arise from the my- 

 celium, from one of which (archicarp) the asci are produced; b a further step in the 

 development of the ascocarp ; the branching archicarp is surrounded by sterile hyphae ; 

 c section of young ascocarp ; the larger hyphoe in the centre are the ascogenous 

 hyphas ; these are enclosed by a pseudo-parenchyma of sterile hyphas ( x 300) ; d series 

 of ripe asci with spores ; e four ascopores seen laterally ; / germinating ascospores 

 (x 800). 



