208 
SUMMARY OP CURRENT RESEARCHES RELATING TO 
belonging to tlie Auteupuccinise, and intermediate between Puccinia and 
Diorchidium, the latter to the Hemipuccinise. 
Prof. L. II. Pammel * * * § describes the injury inflicted on the sunflower 
by Sclerotinia Libertiana ( Peziza sclerotioides'). An exhaustive biblio- 
graphy is appended of the root-diseases caused by fungi. 
The parasite of the beet previously described by M. L. Trabut under 
the name Entyloma leproideum is now made by him j the type of a new 
genus, which he calls CEdomyces. 
Herr H. 0. Juel describes J the following new species: — Ustilago 
seminum on seeds of Arabis petrsea ; Tilletia Seslerise on Sesleria coerulea ; 
Polystigma obscurum on living leaves of Astragalus alpinus ; Puccinia 
nemoralis, the aecidia on Melampyrum pratense, the teleutospores on 
Molinia coerulea. He also establishes a new genus of Phacidiacese, 
Pseudorhytisma, founded on Xyloma Bistortse HO. 
Herr R. Aderhold § identifies Fusicladium dendriticum as the conidial 
form of Venturia clilorospora f. Mali, which occurs on both the apple and 
pear. The relationship of these to F. pyrinum and to V. ditricha f. Pyri 
still remains doubtful. 
Association of Parasitic Fungi. || — The stem and leaves of Anemone 
ranunculoides are, according to M. P. Yuillemin, subject to the attacks 
of two different parasitic fungi, JEcidium punctatum and Plasmopara 
pygmsea. The former of these has but little, if any, injurious effect on 
the nutritive organs of the host ; it produces a hypertrophy of the 
tissues ; but it partially or entirely prevents the formation of the sexual 
organs.^!" The latter parasite causes partial or complete decay of all the 
aerial organs ; if flowers are formed, the number of perianth-segments is 
reduced, and a differentiation of calyx and corolla established; the 
fower approximates more closely in structure to that of other genera of 
Ranunculacese. When these two parasites simultaneously attack the 
same host-plant, the influence of one appears to neutralize that of the 
other, and normal fertile flowers are not unfrequently produced. 
Similar phenomena are presented in the effects of Puccinia Besvauxii 
and Tuberculina persicina on Thesium humifusum. 
Fungus-parasites of the Vine. — M. A. Prunet ** has found a new 
species of Chytridiaceae, to which he gives the name Cladochytrium viti- 
colum , very widely distributed in all parts of diseased vines, especially 
in the cells of the pith. This parasite he believes to be the cause of the 
most diverse diseases of cultivated vines, including the “ gommose 
bacilaire,” “ gelivine,” “ anthracnose ponctuee,” “ roncet,” “ brunissure,” 
and “ mal nero.” He proposes to abolish all these terms, and to unite 
the various diseases due to Cladochytrium viticolum under the common 
term chytridiosis. Its effects are very similar to those of the phylloxera. 
* Trans. Acad. Sci. St. Louis, vi. (1894) pp. 19-232 (2 pis.). 
f Rev. Gen. de Bot. (Bonnier), vi. (1894) pp. 409-10 (1 pi.). Cf. this Journal, 
1894, p. 601. 
X Ofvers. K. Vetensk.-Akad. Forhandl. Stockholm, liv. (1894) pp. 491-508 
(3 figs.) (German). 
§ Ber. Deutscli. Bot. Gesell., xii. (1894) pp. 338-42. 
|| Bull. Soc. Bot. France, xli. (1894) pp. 442-6. 
«([ Cf. this Journal, 1890, p. 744. 
** Comptes Rendus, cxix. (1894) pp. 221-5, 1233-6. 
