18 



FARLOW ON THE GYMNOSPORANGIA 



specimen which I have examined not being in condition to be determined with accuracy. 

 The only instance where I have myself seen the species growing was on the estate of Mrs. 

 Lerman at Catonville near Baltimore, where several imported Junipers were, in May 1879, 

 badly affected by a fungus which was without doubt G.fuscum. I have never collected 

 the present species on J. virginiana, but besides the specimens of Sprague already men- 

 tioned it was found by Tulasne on J. virginiana in France. I am indebted to my friend 

 Dr. Cornu for an opportunity of examining a portion of Tulasne's specimen and it 

 seems to me that the fungus in that case is the same as that collected by Sprague and 

 referred to G. fusciim. Dr. Cornu, 1 however, distinguishes between Podisoma Juniperi 

 Sabinae and P.fuscum, and it is to the first named form that he thinks the specimens 

 found by Tulasne on Juniperus virginiana should be referred. The P. fuscum on J. 

 Phoenicea figured by Gasperrini has been separated by Cooke as a new species under the 

 name of G. Phoeniceae. 



Gymno sporangium fuscum, var. globosum Farlow. 

 PI. 1, figs. 7-11. 



Podisoma fuscum Cooke, in Notes on Podisoma, p. 10, 1871; Peck, in 25th Report, 

 New York State Botanist, p. 89, 1873; Farlow, in Bull. Bussey Inst., Vol. n, p. 225. 



Sporiferous masses densely aggregated, dark brown when dry, yellowish orange when 

 swollen, a quarter to half an inch high, compressed conical or wedge-shaped ; spores ovate, 

 sub-acute, 38,0-45/i long, by 19,0-21^ broad; promycelia usually four. Mycelium perennial, 

 forming globose swellings in the branches. 



On the smaller branches of J. virginiana. 



From Massachusetts (Farlow) to South Carolina (Mellichamp). 



The present form probably passed for a variety of P. macropus with earlier writers pro- 

 vided it was observed by them at all. It was first noticed by Cooke from specimens col- 

 lected by Peck, in Notes on Podisoma, and was referred by him to P.fuscum Duby. In 

 Peck's Report for 1871, published in September, 1873, the species was also referred to P. 

 fuscum. It is very common in the Atlantic States on Juniperus virginiana, on which it 

 forms globose knots resembling those made by G. macropus in some respects, but smaller 

 and less striking. The mycelium is perennial and abounds in the stems and leaves. The 

 fungus, unlike G. macropus, does not break through the central part of the leaf, but bursts 

 through the stem at the point of attachment of the leaves, and the knots formed do not 

 assume the reniform outline so common even in the early stages of G. macro- 

 pus, but are more nearly globose and on the surface appear of a dark mahogany color, 

 rather than silvery gray as in G. macropus. The knots grow comparatively slowly and 

 last for several years, bearing several successive crops of spores. The sporiferous masses 

 rupture the surface irregularly and they are not surrounded by so distinct a ring at the 

 base as is the case in G. macropus. The gelatinous masses are broad and flattened at the 



1 Presence du Podisoma Juniperi Sabinae sur le Juniperus Vol. 25, p. 122. 1878. 

 virginiana et sur divers autres Genevriers : Bull. Soc. Bot., 



