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RESEARCHES ON FUNGI 

 A 



B 



Fig. 39. — Armillaria mellea. Surface views of the hymenium showing the positions 

 of the spores ; A, drawn during the first day of the spore -discharge period ; 

 B, drawn during the second day. In A : at a two spores, and at b one spore, 

 have just been shot away ; at c, d, e, and/, etc., the spores are of full size and 

 will be discharged within a few minutes ; at g and h, the spores have just 

 attained full size ; at i and^, the spores are about half -grown ; at k, the spores 

 are very young ; and at I, the spores are only just beginning to show on the 

 ends of tlaeir sterigmata ; in each of the spaces m and n a basidium has just 

 shot away its four spores, and here other basidia will shortly begin to develop 

 spores. The wide separation of basidia bearing spores of about the same age — 

 a chief character of the Armillaria Sub-type — is to be noticed. In B, which 

 is similar to A : at a is a basidium which has just shot away a single spore 

 and at 6 a similar basidium which has just shot away two spores ; at c is an 

 abnormal basidium of twice the usual size which has six spores instead of four. 

 Magnification, 330. 



