2l6 



MORPHOLOGY. 



In the autumn and winter dead llies are often found stuck to window-panes^ 

 with a white rin^^ of thr eonidia around each lly. 



II, Class Ascomycetes. (The ascus series.) 



1. SUBCLASS HEMIASCOMYCETES. 



441. Order Hemiascales (Hemiascines").— Fungi with a wch developed, 



septate m)'celium, Init 

 \\-\\\\ a si)orangiuni-hke 

 ascus, i.e., a large and 

 indefmite number of 

 spores in the ascus. Kx- 

 a m ]) 1 e s : Protomvces 

 macrosporus in stems of 

 Umbelhfene, or P. poly- 

 sp<")rus in Ambrosia tri- 

 lida. These two are bv 

 some j.ilaced in the I'sti- 

 lagine;e. Dipod ascus 



albidus grows in the 

 exuding sa]) of Bromeli- 

 acea' in Brazil and the 

 sap of the beecli in 

 Sweden. The ascus is 

 developed as the result 

 of the fertilization of an 

 aseogoniuni with an an- 

 theridiuni (see fi^- -Si)- 



ascog ° ' ' 



2. SUBCLASS 

 PROTOASCOMYCETES. 

 442. The a sci are well 

 defined and usually with 

 a limited and diiinite 

 nuniher of spores (usu- 

 ally S, sonK'times i, 2, 

 4, i6, or more). Mvcelium often well developed and septate. Asei scat- 

 tered on the myceUum, not asscniated in defuiite iaelds or groups. 



443. Order Protoascales (Protoascineae). — The asri arc separate cells, 

 or are siaUrred irrcL^ularlv in loose wefts of niyceliuiu. Ko fruil body. 

 Cl'he \easl, Sac . lianiniM .'S, see |iara);raph ly^y; ami lertain UKclddikc 

 fun^i, siinie of wliiili ale parasili' on mushrooms, as ICndomyces, are 

 I'xaniples.) 



L)iii-.i|;jscus albiilus. .4, thread with sexual organs, 

 asritj^cniiini and antheridium; B, fertilized ascogoniutn 

 (lLVclo|i!n)f ascus; C, ascus witli spores; D, conidia. 

 (After Lagerheim.) 



