602 MurRILL: POLYPORACEAE OF NorTH AMERICA 
ment of the question at least until I can study our American form 
in the field. 
Sesia Adans. Fam. 2: 10. 1763 
Serda Adans. Fam. 2: 11. 1763. 
Glocophyllum Karst. Hattsv. 2: 79. 1882. 
Lenzitina Karst. Finlands Basidsv. 337. 1889. 
The genus Sesta was founded upon Vaillant’s figures of S. /ur- 
suta (Schaeff.) drawn from specimens collected on the timbers of 
a boat at St. Cloud, Paris. The genus Serda is based upon a re- 
supinate form of the same species collected at the same time and 
place and figured inthe same work. In establishing the genus 
Gloeophyllum, Karsten overlooked Adanson’s genera already 
founded and later even overlooks or purposely changes his own 
generic name to Lenzitina. All four names above mentioned are 
strictly synonymous, being founded on the same type species. 
Karsten listed three other European species, ZL. adietina (Bull.), 
L. cinnamomea (Fr.) and L. septentrionalis Karst., as congeners of 
the type. 
The species of this genus have white spores, brown substance 
and normally daedaleoid or lamelloid tubes. Abnormal poroid 
forms quite frequently occur. All the species are found on decay- 
ing wood, and, as is often the case, some grow only on the wood 
of conifers, while others are confined to deciduous wood. 5. hir- 
suta is abundant in the northern hemisphere on coniferous wood 
of all kinds, S. Berkeleyi is rare on coniferous wood in tropical 
America; S. pallidofulva is abundant in North America on wood 
of deciduous trees, while its place is taken in tropical America by 
S. striata. The species are all of medium size, easily distin- 
guished by striking characters. 
Synopsis of the North American species 
1. Context ferruginous to chestnut. 
Context avellaneous to umber. 3 
2. Surface hirsute. gs hirsuta. 
Surface finely tomentose or glabrous. 2. S. Berkeley 
3. Furrows broad, a millimeter or more in width, pileus very thin, : 
multizonate. 3. 5. ae 
Furrows narrow, only a half of a millimeter in width, pileus 
rather thick, usually devoid of zones. 4. 5. P altedef s [ 
