OF THE UNITED STATES. 



13 



Podisoma Juniperi Cooke, Decades of Maine Fungi, 1 p. 183 ; Notes on Podisoma, 2 PI. 19, 

 fig. 1. 



Sporiferous masses numerous, scattered or aggregated, yellowish-brown when dry, 

 bright yellow when swollen, cylindrical or slightly compressed, acute or occasionally 

 forked at the apex, from a quarter to half an inch high, spores narrowly lanceolate, those 

 on the outside of gelatinous masses clavate, two-celled, 13jtt— 19f* broad, by SSjU-OOjU long; 

 promycelia usually one or two from each cell. Mycelium perennial, causing long fusiform 

 swellings of the branches. 



On Junipems communis. 



Portland (C. B. Fuller); Cape Elizabeth, Me. (E. C. Bolles); Maine, without locality, 

 in Herb. Curtis (M. B. Blake. No. 579). Northern and Central Europe. 



Apparently not a common species in the United States and known to me only as occur- 

 ring in Maine. It is said by Mr. C. B. Fuller to be common on the ground cedar in the 

 islands in Portland Harbor, and some of the specimens collected by him were distributed 

 by Ellis in North American Fungi. The species is not known to occur on leaves in the 

 United States, but is found on the larger branches, which swell for a considerable distance 

 to nearly twice their normal size, and become cracked on the surface. The sporiferous 

 masses are quite yellow when swollen, and are not dark colored when dry, as in the case 

 in G. fuscum. They are rather slender and pointed at the apex, and, although sometimes 

 a little flattened, are not decidedly compressed as in some other species. I have never in 

 American species seen the apex flattened and expanded, as is shown in the figure of Bul- 

 liard referred to the present species by DeCandolle. The Portland specimens collected by 

 Mr. Fuller bear the closest resemblance to No. 1088, of Rabenhorst's Fungi Europaei, 

 Series Nova. The spores, compared with those of our other two-celled species, are long 

 and narrow. Those borne on the outside of the gelatinous masses are clavate, or have 

 the upper cell broader than the lower, and obtuse at the apex, but the spores in the 

 interior are attenuated at both extremities as in G. macropus, but they are distinctly 

 longer and more slender than the latter. The promycelia are, as a rule, fewer in number 

 than in G. macropus, and one generally sees only one or two given off from each cell. 

 In Europe the species is said also to occur on the leaves of Juniperus communis, 

 and probably a close examination of plants affected will show that such is the case also in 

 this country. The specimen in Herb. Curtis collected by Mr. Blake, is not in sufficiently 

 good condition to show the shape of the sporiferous masses, but the spores suffice to show 

 that the specimen belongs to the present species rather than to G. fuscum. 



Gymnosporangium maceopus Lk. 

 Plate 2, figs. 1-6. 



Gymnosporangium Juniperi virginianae Schw., Syn. Fung. Carol., Sup., p. 74, No. 504. 

 1822. 



Gymnosporangium macropus Link, Species Plantarum, Vol. vi, part 2, p. 128. 1825. 



Exsicc. Ellis, North American Fungi, Fasc. 3, No. 270. 

 Podisoma Juniperi virginianae Fr., Syst. Myc, Vol. m, p. 57. 1832. 



^roc. Portland Soc. Nat. Hist. Vol. I, n, 1869. 



Journal of Quekett Microscopical Club, Nov. 1871. 



