380 Wisconsin Academy of Sciences, Arts, and Letters. 
tion, and to dimidiate-umbricate forms with short lateral stems 
or stemless in another direction. The pilei are smooth, tough, and 
leathery, with tan colors often with rosy or pink tints. The gills 
are serrate and ragged with sphaeroid spores 4-6/x in diameter. A 
number of forms have been named as separate species. 
1. Plate XXIII, Large caespitose plants with concrescent 
branching stems. This is the typical form of well developed plants. 
The clusters are found on stumps and logs in damp woods. Those 
photographed were collected at Neebish, Michigan. 
Pileus 1-3 inches in diameter, thin, tough, flaccid, irregular, 
centrally depressed or infundibuliform, brownish tan with rosy or 
flesh colored tints, paler when dry, margin even, often lobed. 
Flesh whitish. Lamellae broad, deeurrent between the grooves 
on the stem, edges lacerate-serrate, whitish or flesh colored. Stem 
central or eccentric, caespitose, branching and grown together in 
various ways, solid, glabrous, sulcate, concolorous with the pileus, 
often darker below. Spores subglobose, 4-6 /a. Single plants are 
shown by Liard (fig. 183). Clusters of branching forms with 
mam T small plants intermixed are shown in the European illustra¬ 
tions. Cf. Stevenson, volume 2, page 153. 
Note. Cantharellus multiplex Underwood (Bull. Ton*. Bot. Club 26: 
254) may be a form of this species with poorly developed lamellae. 
There is in Europe what is considered a large caespitose form of Len- 
tinus cochleatus, with entire gills. It is called var. occidentalis Bres. 
(see Britzelmayr’s fig. 547.18). Murrill makes it the same as Panus 
concavus Berk, from tropical America. The character of the lamellae 
should determine whether it is a Lentinus or a Panus. 
2. Plate XXIV. Dimidiate, often imbricated forms. The plants 
grow on the sides of logs and sticks and on stumps and standing 
trunks. They are single or imbricated, and are either stemless or 
with short lateral stems. Sometimes a crack in a stump will be 
filled with a dense mass of the tough tissue with numerous sessile 
pilei on the exposed edge as seen in Plate XXIV, B. These forms 
agree so exactly with Lentinus flab ellifor mis Fr. that I have re¬ 
ferred them to that species. The agreement is in shape, size, color, 
fimbriate margin of the pileus, nature of the gills, and especially 
in the size of the spores. Britzelmayr gives the spores of L. flabel- 
liformis as 3-4 x 5-6/a, and those of L. cochleatus as 4-5 x 5-6/a. 
They also agree with Britzelmayr ? s illustration (Lentinus 13). On 
the other hand, there is no doubt that our plants are forms of 
L. cochleatus owing their appearance largely to the place of growth. 
