1912] CURRENT LITERATURE 81 
existence of true hemi-forms is thus definitely demonstrated. Aecidium 
Ligulariae Thiim. on Ligularia Sibirica Cass. was connected with Puccinia 
Eriophori Thiim. on Eriophorum angustifolium Roth. Senecio paluster DC. was 
also shown to be an aecidial host for this form. Puccinia litoralis Rostr. was 
shown to have aecidia on Sonchus oleraceus L., S. asper Vill., and S. arvensis L. 
Puccinia Dietrichiana, described as new, on Agropyrum caninum P.B., was con- 
nected with Aecidium Trolli Blytt on Trollius europaeus L. Two forms on 
species of Carex were connected with aecidia on species of Centaurea. These 
are Puccinia Jacea-leporinae on Carex leporina L. and Centaurea Jacea L.; 
and Puccinia Jacea-capillaris on Carex capillaris L., Centaurea Jacea L., and 
C. nigra L. A third form on Carex gynobasis Vill. was found among aecidia- 
bearing plants of Centaurea orientalis L. These and other known forms, 
whose alternate hosts are species of Carex and Centaurea, the author proposes 
to unite under the collective name Puccinia Centaureae-Caricis. The different 
forms are closely restricted to their respective host species. Lepidium Draba L. 
and Cleome spinosa Jacq. were added to the known aecidial hosts of Puccinia 
Isiacae (Thiim.) Winter. Successful sowings of that species were also made on 
Nasturtium — Thlaspi arvense, Stellaria media, Galeopsis Tetrahit, and 
Raphanus sativus L. Puccinia Caricis (Schum.) Rebout on Carex pallescens 
L. produced aoe, on Urtica dioica L. The same species on Carex vaginata 
Tausch. produced aecidia on Urtica dioica L. and U. magellanica Juss. Carex 
pallescens, C. vaginata, and Urtica magellanica are new hosts for Puccinia 
caricis. Puccinia Maydis Bering produced aecidia on Oxalis stricta L. and 
O. cormiculata L. Pucincia Poarum Nielson on Poa nemoralis L. var. firmula 
Gaud. produced aecidia on Tussilago Farfara L., but not on Petasites officinalis 
Moench. The aecidium on Petasites officinalis, therefore, which has been 
associated by several authors with Puccinia Poarum, does not belong to that 
rust. New cultures with Uromyces Rumicis Winter on Rumex obtusifolius 
again showed that this rust has its aecidium on Ficaria, which is also the 
aecidial host for other species of Uromyces. A form of Uromyces Dactylidis 
Wallr., and P. oblongata (Link) Winter gave negative results. 
In Japan, Orisumo?® has shown that Peridermium Pini-densiflorae P. 
Henn., common there on the leaves of Pinus densiflora, belongs to the species 
of Coleosporium on Aster scaber Thunb. Six other species of Aster on which 
species of Coleosporium occur were not infected by aecidiospores of this Perider- 
mium. The form is separated as Coleosporium Pini-Asteris. 
For students of the Uredinales, attention should be called to FIscHEr’s 
ier of work done on the biology of rusts in 1909.—H. HassELBRING. 
9 ORI RISHIMO, Y., On the site pomaties~ ge Coleosporium on wed scaber 
and — Pini-densiflorae P. Henn. Bot. . Tokyo 24: 1-5. 
R, Ep., Die Publication iiber die Ma der Uredineen im oss 1909. 
oie cae 2: 2332-337. 910. 
