I K 



BRITISH FUNGI. 121 



On heathy ground. 



A very pretty species, varying from nearly white to orange or 

 blood-red, 1-2 lines. Sporidia (■001--002 -0005 in.) •025--03 

 X -012 m.m. 



Peziza (Dasyscypha) subtilissima. Cooke. 



Externally scarce distinguishable from P. ccdycina, Sch. Asci 

 subclavate ; sporidia cylindrical, curved, minute, hyaline. — Peziza 

 calycina, Fries. S. S. 360. 



On bark of firs. Scotland (A. Jerdon). 



Sporidia '009 m.m. long. 



This species has been confounded with Peziza calijcina, from 

 which it differs completely in fruit. The specimens published in 

 '* Fungi Britannici," " Rehm's Ascomyceten," and " Fuckel's 

 Fungi Rhenani," have sporidia that are oblong, •02--023 x "009- 

 •001 m.m., and this is generally recognised as P. calycina. Having 

 occasion to examine specimens received from the late A. Jerdon, it 

 was found that in these the fruit was quite different, as described 

 above, which led to the examination of other specimens ; amongst 

 these the specimens published by Fries in his Scleromycetes 

 SuecicEe, and specimens from Dr. Mougeot ; these all proved to be 

 the present species, which is evidently the species described as P. 

 calycina, Sch., by Karsten and Nylander ; the other form, which 

 is the P. calycina of other European mycologists, is wholly un- 

 noticed, and perhaps does not occur in Finland, or has been over- 

 looked, as this has been with us. The question at once ai'ises as to 

 which is the true P. calycina, Schum. The answer will be simply 

 this : that at the time Schumacher described his species, and when 

 Fries and Mougeot (1821) distributed specimens, the fruit was not 

 habitually submitted to examination, and as the two species are so 

 much alike that they cannot be distinguished from each other ex- 

 ternally, it is extremely probable that both were accepted indis- 

 criminately as P. calycina. 



Peziza (Dasyscypha) calycina var. Tirevelyani. 



Tliis is a singular form of P. calycina, which cannot claim to be 

 regarded as a distinct species on the faith of a single specimen, but 

 which may hereafter be proved to be distinct. It was found on 

 larch, and the fruit differs from the typical form in the large size of 

 the sporidia, which are very variable, and reach as much as '03- 

 •035 m.m. in length, or nearly double that of the typical form. 

 The endochrome is also often bipartite, so that the sporidia have 

 the appearance of being uniseptate. In the plates which accom- 

 pany this number, the sporidia are represented X about 400. 



Fig. 166. — Peziza calycina, Schum. 



Fig. 166b, — P. calycina var. Trevelyani. 



Fig. 167. — P. subtilissima, Cooke. 



The following species are also vere similar externally to P. 

 calycina, of which figures are given: — P. chrysophthalma, P. (fig. 



