290 Transactions. — Botany. 



ficance of this sequence of development cannot be discussed 

 here. Those interested in the subject will find an explana- 

 tion in the Journal of the Quekett Microscopical Club (ser. 2, 

 vol. 7 ; April, 1898). 



The spores of all fungi are colourless when young, the 

 characteristic colour they eventually possess being developed 

 in the wall of the spore just before maturity. When the 

 colours of spores are spoken of, the colour of the mass of 

 spores as seen by the naked eye when deposited on paper is 

 intended. To ol3tain spores in this way, cut off the stalk of an 

 agaric close to the pileus, place the pilaus, gills downwards, on 

 paper, and after a few hours a copious deposit of spores will 

 take place. If the pale gills suggest white spores use black 

 paper, if dark spores use white paper. 



I. MELAN0SP0R.aB3. 



Spores black ; gills dark- coloured at maturity, speckled with 

 the black spores. No tinge of purple present. 



II. PORPHYROSPOR^. 



Spores purplish-black ; gills blackish or brown, with a purple 

 tinge at maturity. 



III. OCHROSPOR^. 



Spores ochraceous, brown, or bright rust -colour; gills at 

 maturity ochraceous, brownish, or rusty orange. No 

 tinge of purple present. 



IV. Ehodospor^. 



Spores salmon-colour or pinkish ; gills salmon-colour or rosy 

 at maturity. 



V. Leucospor^. 



Spores white ; gills in most species white at maturity. In 

 some species the gills are yellow or grey, but the per- 

 manently white spores determine the group. 



Melanospor^. 



Analysis of the Geneba. 

 * Gills deliquescing into a black fluid at maturity, 



1. COPBINUS. 



** Gills not deliquescing, pileus not striate. 



2. Anellaria. Stem with a ring. 



3. Pan^olus. Stem without a ring. 



*** Gills not deliquescing, pileus striate. 



4. PSATHYBELLA. 



