Boston Mycological Club. 
Bulletins No. 13 and 14. (Issued June 6, 1900.) 
Hollis Webster, Corr. Sec., P. O. Box 21, Cambridge, Mass. 
The species of woody fungi which fall into the genera Trametes, 
Daedalea, and Lenzites are very naturally associated. In habit of growth, 
superficial appearance, and texture their resemblance is so evident as to 
Su gg es t that they should be classed together. Owing, however, to the 
stress laid by systematists upon the form of the surface over which the 
layer of spore bearing cells, or hymenium, is spread, Lenzites, because of 
its lamellae, has generally been appended to the agarics, Trametes has 
been placed either with or closely following Polyporus, and Daedalea 
has been put near by. Such a separation is rendered inconvenient by 
the existence of many connecting forms, species of Lenzites frequently 
exhibiting more or less perfectly formed pores, while species of Trametes, 
and particularly of Daedalea, show more or less perfectly formed lamel¬ 
lae. Furthermore, the line between Trametes and Polyporus is by no 
means distinct. 
In Trametes, as the name implies, the trama, or framework of the 
hymenium is well developed, and is plainly continuous with the sub¬ 
stance of the pileus. This is generally evident to the eye, even without 
a hand lens, on examination of the face of a vertical section. Owing to 
the prominence of the trama, the pores are often small, and the partitions 
between the tubes are rather thick and obtuse. The tubes, too, are often 
rather long, and inserted at unequal depths, thus not forming a stratum 
well marked off from the substance of the pileus, as in Polyporus. 
Daedalea includes those species, otherwise like Trametes, in which the 
pores are elongated and sinuous; but unless this character is marked, 
the advantage of drawing a line between the two is not obvious. The 
lengthening of the pores is generally greatest in lines radiating from 
the point of attachment of the pileus. Hence it is clear that a sufficient 
lengthening will eventually give us lamellae, which may be connected 
here and there by cross partitions. When such forms occur, if the 
lamellae are straight, we have something that must be referred to Len¬ 
zites. 
Strictly defined, Lenzites would include only those forms in which the 
lamellae begin as radiating ridges, and would exclude forms which, 
starting with pores (Trametes) or with sinuses (Daedalea), eventually 
become lamelloid by the elongation vertically of the radiating partitions, 
and the disappearance of cross partitions, or anastomosing connections. 
In practice, however, these forms have been often referred to Lenzites. 
In Daedalea and Lenzites the partitions, or lamellae, are often very 
thin, so that the trama is only evident at the point of attachment with the 
pileus. These forms approach, in this regard, the condition in those spe¬ 
cies of Polyporus proper in which the partitions are generally thin. 
Another complication comes in with differences of habit and habitat. 
The same species of Daedalea or Trametes may be, as in Polyporus, at 
one time resupinate, at another effused with reflexed margin, or again 
dimidiate and sessile or stipitate. The effused portion of a Lenzites, 
or an imperfectly developed, tubercular form, is usually porous. 
These different tendencies in form of the hymenium appear sometimes 
in the same species, as for instance in Daedalea ambigua and D. C071- 
fragosa. If the differences happen to be accompanied, as they often 
are, by slight variation in color, marking, texture, and proportions, the 
temptation to multiply species is great. Thus some authors separate, 
others unite, such series of forms, while others, knowing only a single 
