Spore-sac Fungi—Ascomycetes 
underground, they must be hunted for by dogs and pigs trained 
for the purpose. A pig will scent a truffle at a distance of twenty 
feet, and will run quickly to the spot to dig it out with her snout. 
An attendant must follow the pig to secure the truffle before the 
pig eats it. Edible species have not been found growing in this 
country. 
ORDER HYPOCREALES 
The order Hypocreales contains certain fungi which are 
parasitic on other fungi, and also on insects. In the genus 
Cordyceps there is a club-like form about an inch long, and 
of a rich red colour, which lives as a parasite on the 
pupz of various moths buried beneath dead leaves. In 
New Zealand a similar fungus lives on caterpillars. The 
mycelium in time replaces the body, but maintains out- 
wardly the form and appearance of the caterpillar. These 
growths are much prized by the natives as food. The 
form which grows on the truffle-like Elaphomyces is shown 
in the species of Elaphomyces upon which the Cordy- 
ceps lives as a parasite grow two or three inches below 
the surface of the ground, and somewhat resembles a 
truffle in appearance. 
ORDER SPH/ERIALES 
(SEE PLate FacinG Pace 116) 
The Xylaria pictured is a woody fungus which is 
common, growing on logs or at the bases of trees or 
stumps. The collections of asci (perithecia) are fully im- 
bedded in the fleshy part of 
the fungus (stroma), which is 
formed almost wholly of 
hardened mycelium. 
Hy-pé-cré-a'-lés  Cér’-d¥-céps  E’-liph-d’-my-cés | Sphé-rf-d/-lés 9 Zy-la’-ri-4 
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