THE LARCH CANKER 77 
but since no spore measurements were given, it is impossible 
to decide which species he was describing. 
5. Fries (1822), p. 91 (and 1828) described threc forms of 
Peziza calycina, viz.: 
a. Pini sylvestris = P. calyciformis of Willd., Batsch, 
and Hedwig. 
B. Abietis. 
y. Laricis—‘ albido-testacea ’. ‘In ramis pini Laricis, 
Chaillet. P. balsameae. Weinmann. (v.s.)’ 
It is a convention among mycologists! to acccpt Fries’s 
names for Ascomycetes where these are sufficiently dis- 
tinctive ; but where a specics is omitted, or insufficiently 
described by Fries, to take the name given by the first 
investigator after him who gave a description on which 
a species can be based. What may be called the Continental 
contention is that y Laricis is the equivalent of the canker- 
producing fungus, and, if this is going to be raised to specific 
rank, a newname[P. (Dasyscypha) Willkommii, Hart.] must 
be adopted for it, since ‘ P. calycina’ is retained for a Pini 
silvestris. 
It must be objected, however, that since each of the 
species of Dasyscypha under consideration grows on a variety 
of trees, and since D. calycina, D. subtilissima, and D. 
resinaria, as described on p. 76, can each grow on the 
larch, it is very doubtful to which of these species y Laricis 
of Fries belongs, and it is also doubtful which form he 
intended by a Pini sylvestris. Certainly ‘ albido-testacea ’ 
is not peculiarly applicable to the canker-producing fungus. 
Fries introduced ‘ Dasyscyphae’ (Sacvs, hairy ; oxvdos, 
a cup) as tribe vi of series ii (Lachnea) of the large genus 
Peziza. 
Passing over Corda (1837), v. 78, and Hornemann (1839), 
plate 1917, 1, whose species given under the name of Peziza 
calycina are both doubtful, we come to 
6. Fuckel (1869), who is the first to give spore measure- 
ments. Raising Fries’s name Dasyscyphae to generic rank, he 
1 International Rules of Botanical Nomenclature, Brussels, art. 19, f. 
