234 .\RTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



name JEcidium (Ccroma) osmnndatum on page 309 of the same 

 work. 



The structure of this fungus is not evident, although there is an 

 abundance of globoid, brown spores present. The spores are 13-16 /a 

 in diameter, and echinulate or verruculose. They resemble smut 

 spores, but Clinton in his monograph of the Ustilaginales in the 

 North American Flora (7:24. 1906), where it is mentioned as 

 Ustilago Osmundce Peck, excludes the species from that order and 

 suggests that it may be a Hyphomycete. The latest name is Myco- 

 syrinx Osmundce Peck (TV". Y. State Mus. Rep., 191 1, page 43). 



*2%g6. 86. C. A. Pj-ratum, L.v.S., rather rare on leaves of Pjtus coronaria, 

 Bethlehem. By no means identical with C. Roestelites. 

 C. spots on upper surface, orbicular, red, on the border ochraceous, 

 center blackish. On the lower side there appear pseudoperidia 

 very densely crowded, subconcentric, only a little elevated, 

 margin beautifully multifid-fimbriate; the parts straight, not at 

 all revolute, divergent, pale. Spores fuscous. 



Represented by one oblong leaf, 3.5 cm. long and 1.5 cm. broad, 

 broken across the middle, and mounted loose in packet, bearing nu- 

 merous ascia on a somewhat hypertrophied spot, and by an empty 

 packet labelled on the inside " Cseoma (Rcestelia) coronariatum LvS 

 Salem in Pyr. coronar," with " ^cid " later substituted for Rcestelia, 

 and on the outside "^cidium Coronariatum LvS in Pyro conar. 

 Salem." 



The leaf is clearly that of Mains coronaria (L.) Mill. (Pyrus 

 coronaria L., P. angustifoUa Ait.), the rust being secia of Gymno- 

 sporangium Jimiperi-virginiana: Schw. To the mounted specimen is 

 attached another packet containing a little larger, more lanceolate 

 leaf, W'ith numerous secia of the same sort, bearing an inscription 

 by Dr. W. G. Farlow, saying it is from the Herb. Curtis, on Pyrus 

 angustifoUa, Society Hill, N. C. no. 1226, and corresponds with 

 Schweinitz's type of A. pyratum. The name A^cidium (Cceonia) 

 pyratum is given on page 309 of the same work. 



*28gy. 87. C. A. sambuciatum, L.v.S., Syn. Car. 441, frequent on petioles 

 and leaves of Sambucus canadensis, also Bethlehem. A further 

 diagnosis follows. 

 C. spots intumescent, often very large (i. e. 2 inches) on petioles, 



