OF THE UNITED STATES. 



31 



attack the fruit more frequently than R. lacerata. The Aecidium pyratum of Schweinitz, 

 Syn. Fung. Am. Bor., is probably the same as R. penicillata. 1 am indebted to the 

 officers of the Academy of Natural Sciences of Philadelphia for the privilege of examining 

 tBe original specimen in their collection and I have also specimens from li;ivenel and 

 Curtis which do not differ from the type. Although it is unusual to find R. penicillata on 

 Crataegus in this country, what seems undoubtedly that species was collected by Prof. W. 

 R. Dudley on C. crus-galli at Ithaca, New York. 



ROESTELIA IIYALINA Cooke. 



Roestelia hyalina Cooke, in Bull. Bot. Soc, 1877, pp. 314, 315; Hedwigia, Vol. xvn, p. 

 38 ; Crevillea, Vol. vi, p. 137. Exsicc. Ravenel, Fungi Americani, No. 37. 



Aecidia hypophyllous, borne few together in subpyriform tubercules ; peridia pointed, 

 cylindrical, delicate, splitting longitudinally ; peridial cells rhombic-ovate, about 35/x broad 

 by 55,u long, cell-walls thin, nearly smooth ; spores globose, 19u-22u in diameter. Spermo- 

 gonia few, in yellowish spots on the upper surface of the leaves. 



On leaves of Crataegus. 



Aiken, S. C. (Ravenel). 



This species is only known to me by the single small specimen in the Fungi Ameri- 

 cani Exsiccati, from which the description above given was taken. The specimen bears a 

 close resemblance to some forms of R. lacerata, but the cells of the peridium are thin 

 walled and destitute of the markings generally seen in the other species. The spores in 

 my specimen are distinctly brownish and not orange colored as given in the description in 

 Hedwigia, loc. cit. As it may be that there was an error in distribution, I quote the origi- 

 nal description. " Epiphylla, vel amphigena. Maculis rufis. Soris convexis brunneis. 

 Pseudoperidis cylindrico-acuminatis, longitudinaliter et unilateraliter dehiscentibus. Spo- 

 ris globosis, aurantiacis, .02-.022 mm. " 



Roestelia aurantiaca Peck. 



?/ 



Roestelia aurantiaca Peck, in 25th Report, p. 54, PI. i, figs. 10-12 ; Bull. Buffalo Soc. 



Nat. Sci., Vol. i, p. 68 ; Tuckerman's Plants of Amherst ; Farlow, Bull. Bussey Inst., 



Vol. ii, p. 225. Exsicc. Ravenel's Fungi Americani, No. 2K"^/ 

 Roestelia lacerata Herb. Curtis in part. 



Aecidia densely aggregated on the young fruit and swollen stems ; perima erecu or 

 slightly recurved, an eighth to a quarter of an inch in length, cylindrical, tubular, shining 

 white, coarsely toothed at the apex, teeth seldom extending more than a quarter of the 

 length of the peridium; cells of peridium squarish-ovate, closely united, about 55// long 

 by 36u. broad, cell wall very thick and striate. Spores bright orange, spherical or slightly 

 angular, 27^ to 47,u in diameter, average 30a-40a, cell wall thick, punctate, pores distinct. 

 Spermogonia in discolored spots on the leaves. 



