84 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Culture of Uredineae.* — From the cultivation of Uredineae, Herr H. 
Klebahn has established the following points : — Coleosporium Sonchi 
belongs to Peridermium Fischeri sp. n. ; C. Euphrasise must he divided 
into two species, belonging to Peridermium Stahlii parasitic on Alectoro - 
lophus , and to P. Soraueri sp. n. on Melampyrum ; the aecidia on Gonvallaria 
majalis , Polygonatum multiflorum , and Maianthemum bifolium, are identi- 
cal ; the uredoform on Phalaris and Holcus mollis infects only Phamnus 
Frangula, that on H. lanatus only B. cafharticus. 
Rusts of Grain .f — Prof. J. Eriksson and Dr. E. Henning state that 
Puccinia graminis does not hibernate in Sweden in its uredo-stage. P. 
Phlei-pratensis sp. n., on the other hand, parasitic on that grass, possesses 
a hibernating mycele, and has no genetic connection with JEcidium 
Berberidis. The authors discard altogether the name P. rubigo-vera, 
breaking up this parasite into three species, of which P. ( Uredo ) 
glumarum is by far the most destructive to corn-crops. The other two 
species formed out of P. rubigo-vera are P. dispersa sp. n. and P. anomala 
( rubigo var. simplex). They agree with Klebahn in dividing P. coronata 
into two species, coronata and coronifera, the former of which has its 
aecidioform on Bhamnus Frangula, the latter on B . catharticus. 
Mycorhiza of the Fir 4 — Herr B. Frank concludes, from experi- 
ments on growing the spruce fir in sterilized and unsterilized soil, that 
the mycorhiza is of service to the young plant in enabling it to make 
use of the nitrogen compounds present in the humus. Parasitic fungi, 
like Agaricus melleus, do not form a mycorhiza. 
Organisms of the Mucus-flux of Trees.§ — In the “ mucus-flux ” or 
“ sap-flux ” of a lime and of an elm respectively, Dr. W. Kruger finds 
two organisms, which he makes types of a new genus of fungi, Proto - 
theca , the one found in the elm being named P. Zopjii, that in the lime 
P moriformis. Prototheca is characterized by the entire absence of a 
mycele. In the usually round, oval, or ellipsoidal sporange a number 
of spores are produced by successive divisions, and are freed by the 
bursting of the sporange or the absorption of its wall. These spores 
again directly form sporanges. In the author’s view this genus forms 
a new type of fungi, bearing a similar relation to the Protococcacese that 
the Schizomycetes bear to the Cyanophyceae, the Saprolegniaceae to the 
Siphoneae, and the Ascomycetes to the Florideae. 
In the same situations were found also two new green algae. The 
first of these occurs in the flux of poplars and elms, and was named 
Clilorella protothecoides. In its physiological relationships it agrees 
almost entirely with Prototheca Zopjii. The other has been found at 
present only in the flux of the poplar ( Populus alba), and has been 
made by the author the type of a new genus of algae, under the name 
Chlorothecium saccharophilum. Chlorothecium consists of ellipsoidal, 
* Zeitsch. f. Pflanzenkrankkeiten, iv. (1894) p. 194. See Hedwigia, xxxiii. (1894) 
Rep., p. 128. 
t Tom. cit. See Bot. Ztg., lii. (1894) 2 te Abtkeil., p. 310. Cf. this Journal, 
1894, p. 722. 
x Forstwissenscli. Centralbl., 1894, 5 pp. and 1 pi.. See Bot. Centralbl., lix. 
(1894) p. 145. 
§ Beitr. z. Pkys. u. Morph, niederer Organismen (Zopf), 4 tes Heft, 1894, pp. 69- 
116 (2 pis.) ; Hedwigia, xxxiii. (1894) pp. 241-60. Cf. this Journal, 1894, p. 604. 
