8 LICHENOLOGICAL MEMORABILIA. 



iEcidium Parnassiae. Grav. " Parnassia Cluster Cups " 

 Hypophyllous. Spots pallid ; peridia in subrotund patches, irre- 

 gularly disposed, tawny yellow, between urceolate and concave, the 

 margin thick and nearly entire ; spores pallid. — Duby. Bot. Gall. ii. 

 p. 904. 



On leaves of Parnassia palustris. Near Glasgow {Dr. Greville). 

 The original specimen is in the Edinburgh Herbarium. 



LICHENOLOGICAL MEMORABILIA.— No. 1. 

 By the Rev. W. A. Leighton, B.A., F.L.S., F.B.S. Ed. 



Pilophoron fibula. TucTt. 

 This very interesting lichen, which until lately was supposed to be 

 confined to the White Mountains in North America, has been con- 

 stantly confounded with Stereocaulon condensatum, Ach. ; but is 

 readily distinguished by the differences in the spores, those of 

 the former being ellipsoid and simple, and those of the latter 

 fusiform, 3-7-septate. I have myself repeatedly gathered it 

 throughout the Snowdonian district, Nant Francon, the Glyders, 

 Avan Mowddy, and in other parts of North Wales, where it 

 occurs in some abundance ; but requires careful observation to de- 

 tect it, from its close growing habit and the minuteness of its 

 fructification. Dr. Nylander, in the appendix to his " Lichenes 

 Lapponica3 Orientalis," mentions it as found by M. Th. Simming at 

 Dianovagora, near Lake Onega. And in looking over some lichens 

 in the herbarium of Mr. Horatio Piggot, of Tunbridge Wells, I 

 detected a remarkably fine specimen with magnificently developed 

 fructification, under the name of St. cereolinum, which he had col- 

 lected near the Cuchullin Hills, near Sligachan, Isle of Skye, 

 Scotland. If carefully searched for it may be, no doubt, detected 

 in Alpine and sub-Alpine regions throughout the world. Most of 

 English and Scotch localities given for St. condensation and cereo- 

 linum will, on more careful research, prove referable to Pilophoron 

 fibula. See Leight. Lich. Fl., 2nd ed., pp. 469 and 470. 



Morocco Lichens. 



Dr. Hooker, of Kew, placed in my hands for examination and 

 determination the lichens which he collected in his expedition to 

 Morocco and the Atlas Mountains, in May, 1871. Though few in 

 number they are very interesting, especially from the locality from 

 whence gathered. 



They are as follows : — 



Cladonia endiviosfolia, Fr. Tangier and Tetuan, North Morocco. 



Alectoria cana, Ach. Beni Hosmar, Tangier, and Tetuan, North 

 Morocco. 



Ramalina calicaris, Fr. Tangier and Tetuan, and Ain-el-Hadjar, 

 North Morocco. 



