WHITE-PINE BLISTEK RUST. 15 
where extensive collections of the different species of Ribes were 
located, and hence more species have been subjected to attack. 
In Europe the following species have become infected naturally: 
Ribes aciculare Smith, R. affine H. B. K., R. alpinum L., R. ameri- 
canum Mill., R. aureum Pursh, R. biebersteinii hybrid, R. bracteosum 
Douglas, R. cynosbati L., R. divaricatum Douglas, R. glandulosum 
Grauer, R. gordonianum hybrid, R. Mrtellum Michx., R. irriguum 
Douglas, R. menziesii Pursh, R. missouriense Nuttall, R. multijlorum 
Kit., R. nigrum L., R. niveum Lindl., R. odoratum Wendl., R. oxya- 
canihoides L., R. petraeum Wulf., R. reclinatum L., R. rotundifolium 
Michx., R. rubrum L., R. sanguineum Pursh, R. setosum Lindl., R. 
triste Pallas, R. vulgare Lam. 
The names of species of Ribes of North America are based on the 
treatment of the North American species by Coville and Britton in 
" North American Flora" (22) and of species of the other continents 
on that of Janczewski in "Monographie des Groseilliers, Ribes L." 
(60) . For the sake of convenience the currants and gooseberries are 
kept in the single genus Ribes. 
As recently as 1914 (136) the fungus had not been found in North 
America attacking any wild species of Ribes. Since then it has 
been found attacking an increasing number of wild Ribes, as addi- 
tional species are subjected to infection by the spreading and multi- 
plication of the known outbreak areas and as new ones are dis- 
covered. To date it is known to have been found attacking naturally 
the following species of Ribes in the States and Provinces named: 
Ribes americanum (floridum). — Maine, New Hampshire, Vermont, Massachusetts, 
Rhode Island, New York, Wisconsin, Minnesota, and Ontario. 
cynosbati. — Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, 
Connecticut, New York, New Jersey, Wisconsin, Minnesota, and Ontario. 
glandulosum (prostratum). — Maine, New Hampshire, Vermont, Massachusetts, 
Connecticut, New York, Wisconsin, Minnesota, and Ontario. 
Mrtellum. — Maine, New Hampshire, Massachusetts, New York, Wisconsin, and 
Minnesota. 
irriguum. — New York. 
lacustre. — Maine, New Hampshire, New York, and Wisconsin. 
missouriense. — New York, Minnesota, and Wisconsin. 
nigrum. — Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, 
Connecticut, New York, New Jersey, Wisconsin, Minnesota, Ontario, and 
Quebec. 
odoratum. — Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, 
Connecticut, New York, Minnesota, and Ontario. 
reclinatum (grossularia). — Maine, Vermont, Massachusetts, New York, Wiscon- 
sin, Minnesota, and Ontario. 
rotundifolium. — New York. 
triste. — Maine, New Hampshire, Massachusetts, Wisconsin, Minnesota, and 
Ontario. 
vulgare (rubrum).— -Maine, New Hampshire, Vermont, Massachusetts, Rhode 
Island, Connecticut, New York, Wisconsin, Minnesota, and Ontario. 
