512 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
lophus and on Melampyrum pratense , and it appears to be connected 
genetically with Coleosporium Euplirasise. The latter is connected in 
the same way with Coleosporium Tussilaginis. 
It has been long known that, while the aBcidiospores of Peridermium 
Strobi and Cronartium ribicola germinate freely on almost all species of 
Bibes, B. Grossularia is exempt from their attacks. The author states 
that this immunity ceases if the gooseberry is grafted on Bibes aureum. 
The secidium of Euphorbia Esula belongs, like that of E. Cyparissias, 
to a uredo- and teleuto-spore form parasitic on Pisum sativum. 
Puccinia sylvatica , connected with JEcidium Taraxaci, was found on 
Car ex arenaria. P. Phragmitis is connected with an ascidium on Bumex 
crispus , and P. Magnusiana with one on Banunculus repens. Puccinia 
coronata , on Lolium perenne, is connected, not with 2Ecidium Grossularise , 
but with 2E. Bliamni. Under the name P. coronata two species appear 
to be confounded, both growing on various species of grass. The 
aecidiospores of JEcidium Convallarise give rise, on Phalaris arundinacea } 
to the uredo- and teleuto-spore forms of Puccinia Digraphidis. 
Herr P. Magnus * * * § gives further particulars respecting the occurrence 
and parasitism of the four European species of Gymnosporangium , viz. 
G . fuscum, juniperinum , clav arise for me , and confusum. 
In another communication f Herr Magnus contributes additional 
information on the species of Uromyces and JEcidium found on Euphor- 
bia , on the genetic relationship between the various species of Cseoma 
and Melampsora, and on Peronospora Cytisi. 
Development of the Spermogone of Cseoma.f — Mr. H. M. Richards 
describes in detail the structure and development of the spermogone of 
Cseoma nitens on Bubus villosus. It originates, in the first place, as an 
outgrowth between and not within the epidermal cells of the host-plant, 
but soon breaks through and absorbs the confining walls, and makes its 
way into the cavities of the surrounding cells. It is more superficial 
than the spermogone of most other Uredine®. 
Anthracnoses of the Solanacese.§ — Prof. B. D. Halsted states that 
on each of the three cultivated species of Solanacese, the tomato, the 
pepper ( Capsicum ), and the egg-plant, there is found a species of Gloeo- 
sporium and a species of Coleotrichum , to which different specific names 
have been given. By culture experiments he has determined that the 
three species of Gloeosporium have no structural differences, and that they 
are all identical with the bitter-rot of the apple Gloeosporium fructi - 
genum. It is also probable that all the three species of Coleotrichum are 
forms of C. Lindemuthi. 
Monilia fructigena.|| — Prof. J. E. Humphrey has investigated the 
life-history of this fungus, which causes mummifying of the fruits of 
Drupacese and Pomese, and states that the chains of so-called spores are 
not true conids, but chlamydospores or oi'diospores of the most primitive 
type. There are, however, true conids produced on sporophores. It is 
* Verkandl. Bot. Ver. Prov. Brandenburg, 1893, pp. xiv.-xvi. 
+ Ber. Deutsch. Bot. Gesell., xi. (1893) pp. 43-53 and 212 (1 pi.). 
X Proe. Amer. Acad. Arts and Sciences, 1893, pp. 31-6 (1 pi.). 
§ Bull. Torrey Bot. Club, xx. (1893) pp. 109-12. 
jl Bot. Gazette, xviii. (1893) pp. 85-93 (1 pi). 
