86 



E. B. GREEN ON ROOTS AND SOME GROWTHS UPON THEM. 



The second division consists of gelatinous growths which in 

 many respects resemble fungi ; they grow from the root or hair, 

 do not confine their attacks to the part from which they spring, 

 bat stretch from hair to hair, or from hair to root, and completely 

 destroy the hair and greatly injure the root ; some kinds traverse 

 the root-hairs, tilling them with delicate threads, which emerge at 

 intervals from it, and others nearly fill the cavity with a single 

 thread, and on emerging from the hair become branched. 



In some cases they radiate in straight threads from a central 

 point, and in others form a dense network. The spores are very 

 minute and appear to be formed upon the threads, or in bunches of 

 six or more upon short stalks. 



Spores are produced abundantly, and are greatly varied in shape 

 and colour. They are round, oval, disk-shaped, and sometimes 

 almond-like, black, white, green, brown, red or yellow in colour, 

 occasionally quoit-shaped, showing complementary colours (red and 

 green) in the outer and inner rings ; in some cases they appear to 

 be enveloped in a gelatinous mass, with slight indications of a 

 stalky attachment ; in others, smaller bunches upon short pedicels 

 attached to, or enclosed in, filmy branches quite distinct in sub- 

 stance and form from the stem, and divided from it by a well- 

 marked wall ; they are also seen in considerable groups upon the 

 stem, or closely ranged in single file upon it, or at considerable and 

 irregular intervals. 



I have found crystals of three types upon the parasites of buck- 

 wheat, lunaria, and parsnip, each differing from the others. 



The following is a list of some of the plants which I have 

 examined, with the number of different growths upon them as 

 shown in the drawings : — 



1 

 2 

 1 

 1 

 1 

 I 

 2 

 2 

 1 

 2 

 2 



