100 SALMON: SUPPLEMENTARY 
apex. The fungus at this stage somewhat resembles Erysiphe 
polygoni—a fact which very probably accounts for the record by 
Berkeley (Gard. Chron. 21: 22. 1884, of the occurrence of “ 27J- 
siphe communis’? on vine leaves, from Washington, U. S. A, 
growing with U. necator. 
Professor H. O. Juel has informed me that he found in Sept, 
1900, at Bonn, Germany, “one leaf of Vitis vinifera that was cov 
ered with Oidium, and had also some well-developed perithecia of 
Uncinula spiralis.” 
S| ae ET 
It still seems necessary to assume, however, that U. necator, 
although occasionally producing perithecia in Europe, as 4 rule 
survives the winter by means of persistent mycelium or hibernat- 
ing conidia. (See Wortmann, 88.) : 
Pierce (58*) in his monographic study of the “ California Vine 
Disease,”’ gives a full account of the manner in which U. necator 
attacks the vines of California. 
U. macrospora Peck. (Monograph, p. 107) 
Exsicc. add: Shear, New York Fungi, 143 (in herb. Jaczewski): 
U. Ciintontt Peck. (Monograph, p. 109) 
Syn. add ; U. Kusanot WH. &. P. Syd. Mém. Herb. Boiss. 4° 
4. 1900. U. Zelkowae P. Henn. Engler’s Bot. Jahrb. 29: 149 
1900. : 
Exsicc. add: *Rehm, Ascomycet. 1198; Shear, 
Fungi, 142 (in herb. Jaczewski). 
Distrib. add: Florida. 
Hosts. add: Celtis Sinensis. | 
As I have pointed out in the “ Erysiphaceae of Japan (68, . 
438) U. Clintonii is variable as regards the shape of its appen 
ages. These may show a much enlarged clavate ape®% ° | 
measuring 30 / across, or the apex is only slightly enla Ms 7 
measuring 20 p across. “U. Kusanoi H. & P. Syd.” ee Ce 7 
Sinensis from Japan, has appendages of the latter description, we 7 
exactly matches certain examples of U. Clintonii on Tila Am t 
cana from the United States. ene 7 
The record of U. Clintonii from Florida is based on a Spe" q 
sent to Kew from the Florida Agricultural College, Lake ©’ 
New York 
