SYNCHYTRIA IN VICINITY OF STANFORD MC MURPHY 113 



SYNCHYTRIUM AMSINCKI^E n. sp. 



Spots light yellow when immature, reddish brown at maturity; galls 

 formed of swollen, externally projecting epidermal cells, which collapse 

 when mature ; resting spores one or two in a cell, elliptical or globose, 

 70-100 x 90-11 5/x, epispore brown, smooth; sorus yellow, elliptical or glo- 

 bose, in galls similar to those of the resting spores, 65-90 x 100-120/x,; zoo- 

 sporangia in a sorus, 7-20, angular from mutual pressure, or globose to 

 elliptical, 25-40 x 25-45/i in diameter. 



On leaves and stems of Amsinckia intermedia F. & M. Stanford Uni- 

 versity, California, in fields and waysides. 



This is closely related to the European species S. Myosotides Kuhn, but 

 that species, so far as I know, has never been known to produce sori, and 

 belongs to the sub-genus Pycnochytrium, while in this form sori are common 

 and the galls, which are often 200-26 5/u, in diameter before collapsing at 

 maturity, are brown rather than deep red, as in that species. 



The type was collected near Stanford University March 24, 1911, and 

 is deposited in the Dudley Herbarium. 



SYNCHYTRIUM INNOMINATUM Farlow. 



Synchytrium innominatum Farlow. Bot. Gaz. 10:240, 1885. 



"Spots dark red, resting spores globose or slightly elliptical, .07-. 10 mm. 

 in diameter, epispore thin and smooth, in oval host cells, which do not pro- 

 ject beyond the surface of the leaves. Sori yellow, about .12-. 15 mm. in 

 diameter, sunk in the leaves." 



"On leaves of Malacothrix. Santa Cruz, Cal." 



On leaves of Agoseris grandiflora Greene, Page Mill Road, altitude 

 about 1,000 feet. 



My specimens are referred to the above species, though the resting spores, 

 of which there are one or two in a cell, are more often elliptical than globose 

 and vary more in size, 40-80 x 60-90/A. The sori are also smaller, 

 70-117 x 78-117)Lt. As Dr. Farlow says, 1. c., "the species is certainly closely 

 related to S. Taraxici D. By. & Wor." But the sori in my material are 

 larger on the average and the discolorations on the leaves, when fresh, 

 were dark red rather than golden red or blood red. 



It is very desirable that cultures be made on the dandelion and related 

 plants, that the limits of the species may be determined. 



SYNCHYTRIUM ANDINUM Lagh. 



Synchytrium andinum Lagh. Bull. Boiss. 1895, p. 61. 

 Galls multicellular, reddish brown, often confluent; sori globose or 



