242 BOTANICAL GAZETTE [SEPTEMBER 
connection the past work of Fraser’ on the fern rusts has been of special inter- 
est. s author now reports? a further series of cultures supplementing and 
chu former work which was not regarded by him as entirely conclusive. 
he work was done at Pictou, Nova Scotia. Successful infections on Abies 
balsamea (L.) Mill. were made with senate of Uredinopsis Bigwig 
agn. from 
Stérmer from Onoclea Struthiopteris (L. ., U. Osmundae 
Osmunda Claytoniana L., U. Phegopteridis remit feist Phegopteris Drove 
(L.) Fée, and U. mirabilis Magn. from Onoclea sensibilis L. -The aecidial 
form on Abies is Peridermium balsameum Peck. Successful itectaee with 
aecidiospores of this form were made on Onoclea Struthiopteris, O. sensibilis, 
and Aspidium Thelypteris Sw. The telial phase on the last is known as Ure- 
dinopsis Atkinsonii Magn. 
Cultures with three other species not belonging to the fern rusts are reported 
also in confirmation of former work. Teleutospores of Pucciniastrum Myrtilli 
(Schum.) Arthur from Vaccinium canadense Kalm produced a Peridermium 
of the type of P. Peckii Thiim. on Tsuga canadensis (L.) Carr. Teleutospores 
of Melampsora Medusae Thiim. from Populus grandidentata Michx. produced 
Caeoma A bietis-canadensis Farl. on Tsuga canadensis (L.) Carr. Teleutospores 
of Melampsora arctica Rostr. from Salix sp. produced aecidia (Caeoma sp.) on 
Abies balsamea (L.) Mill. 
Further work on the phos beret rusts is reported by MEINECKE, SPAUL- 
DING, and by HEpGcock and L 
MEINECKE” infected Castilleja miniata Dougl. with aecidiospores of 
Peridermium statactiforme Arthur and Kern from Pinus contorta Loud. The 
resulting telial stage is Cronartium coleosporioides (Dietel and Holway) Arthur. 
Hepccock and Lone" report the following results. Aecidiospores of 
Peridermium inconspicuum Long from Pinus.virginiana Mill. produced uredinia 
(Coleosporium inconspicuum (Long) H. and L.) on Coreopsis pecionerget L.; 
aecidiospores of P. delicatulum Arthur and Kern from Pinus rigida 
produced uredinia (Coleosporium delicatulum (Arthur and Kern) H. and L. ye on 
Solidago lanceolata L.; and aecidiospores of P. stalactiforme Arthur and Kern 
from Pinus contorta Loud. produced uredinia and telia on Castilleja linearis 
Rydb. The last result is regarded as confirming the work of MEINECKE 
mentioned above. For the synonomy of these forms see the work of ARTHUR 
zat KERN mentioned below. : 
n 1907 CLINTON showed that Peridermium pyriforme Peck (ex ARTHUR 
oi Kern) on Pinus silvestris L. is the aecidial form of Cronartium Comptoniae 
§ Rev. Bor. GAZ. 56: 234. 
9 Fraser, W. P., Further ae with heteroecious rusts. Mycologia 5: 233-239- 
aa 
© MEINECKE, E. P., Notes on areca, sgusipeliea Arthur and Cronarlium 
— = topathology 3:167-168. 1913 
Hepccoc and Lone an | He Notes on cultures of three species of 
Peidectan. Phy soesahes a: re 252, 20 
