Harper-—Species of Lentirms in Great Lakes Region. 367 
reports nine species, of which lepideus, tigrinus, suavissimus, coch- 
leatus, and ursinus are the type forms. He describes two minor 
forms which he thinks sufficiently distinct to merit names: spretus, 
a form of lepideus ,, which he says European mycologists have prob¬ 
ably overlooked, and umbilicatus, which he recognizes as closely 
related to cochleatus, but which he considers not quite the same as 
omphalodes of Europe. Peck also reports Inaematopus, the red¬ 
stemmed form of suavissimus, and L. sulcatus the same as L. ful- 
vidus of Bresadola, a rare species found only once in the state. 
Peck found no form of the L. adhaerens group. 
No one of the seven or more species of Lentinus described by 
Peck from material sent him by correspondents from different parts 
of the country has group value. Murrill, in the North American 
Flora, does not admit any of them as valid species. They should 
not, however, be dumped in as synonyms. They represent forms 
worth noting and which future collectors must reckon with. Their 
peculiarities should be noted in their proper groups. 
As has already appeared, the Lentinus floras of the Northeastern 
United States and of Central Europe are very nearly alike. The 
details of the variations are given more fully in the description of 
the species, but a few general facts are noted here. 
1. The species of the Lentinus tigrinus group are so universally 
parasitized in this country that the plants appear to have been 
stunted. Large, luxuriant forms like those illustrated in Cooke, 
lUust., 1138, and Rolland, Atlas, 45, are not reported. The para¬ 
site has not been found in Europe. 
2. The sticky, pulverulent, and resinous species of the Lentinus 
adhaerens group are poorly represented in this region, but are com¬ 
mon in Europe, where leontopodius, pulverulentus, resinaceus, ad¬ 
haerens, and adhaesus are distinguished. 
3. On the other hand, the Lentinus suavissimus group appears 
better represented here than in Europe. The plants are quite com¬ 
mon in Northern Michigan, and besides the lateral stemmed forms 
which appear typical of the group we have the larger central 
stemmed plants represented by L. odorus or L. jugis. We have 
also the red-stemmed form L. haematopus, which is much more 
marked than the European L. anisatus. 
4. The variation in the Lentinus cochleatus group appears very 
similar in both countries. The small central-stemmed forms are 
referred to L. omphalodes there and to L. umbilicatus here. The 
