EEPOKr OF THE STATE BOTANIST 



215 



when they are soft, short and collected in little floes or tufts ; 

 tomentose when crisped and interwoven so as to form a woolly 

 surface; squamose ov scaly when coarse and collected in tufts, 

 also when the cuticle breaks or cracks into small flakes or spot- 

 like patches. These same terms are also applicable under the 

 same conditions to the surface of the stem. The cap is also said 

 to be ujnbonate when it has a small projection or boss on its 

 center ; unibilicate if it has a small central cavity or umbilicus, 

 and hygrophanous when it has a soaked or watery appearance, 

 the loss of which by drying is accompanied by some change in 

 color. The margin of the cap is striate when marked by nearly 

 parallel radiating lines. If these lines are very slight or are 

 visible only in the moist or hygrophanous state the fact is indi- 

 cated by the term stiiatulate. 



The stem is equal or cylindrical when it is of uniform diameter 

 in all its length ; hulhouf^, when more or less abruptly enlarged at 

 its base ; stuffed^ when its interior or central part is of a softer or 

 looser texture than the exterior. In some mushrooms a thin 

 membrane, in others a mass of webby filaments, stretches from the 

 stem to the margin of the cap and conceals the gills in the young 

 plant, but as the cap expands, this membrane, called the veil^ 

 usually separates from the margin of the cap and adheres to the 

 stem, forming around it a ring or collar, botanically known as an 

 anjiulus. 



In a few species the young plant is wholly enveloped in a 

 membranous or somewhat tomentose volva or wrapper, but this 

 is soon ruptured by the growing plant and its remains are in 

 some cases entirely left at the base of the stem, in others they 

 partly adhere to the upper surface of the cap in the form of loarts, 

 or more rarely and exceptionally in a few small irregular patches. 

 The dangerously po sonous species occur in a geuus in which 

 the volva is a prominent character. 



The spores are the seeds or reproductive bodies of mushrooms. 

 They are as fine as dust and are invisible to the naked eye except 

 when collected, together in great numbers or in masses. The 

 Jtymeniutn is the surface i>r part of the plant immediately con- 

 cerned in the production of the spores, and the /ty/mnojdiore or 

 hyni'nophorum is the part that supports the hymenium. In the 

 Common mushroom and many others as well, the sports develop 



