682 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Saprophytic development of parasitic Fungi.* — Herr B. Meyer 

 finds that the following fungi, which are normally parasitic on living 

 plants, can be induced to develope as saprophytes, though they do not 

 then always develope their organs of propagation : — Polystigma ruhrum, 

 Bamularia asxjerifolia, Claviceps purpurea, and Protomyces macrosporus, 

 the last only imperfectly and with difficulty. 



Haplobasidion, a new genus of Dematieae. — In the fifth fascicle 

 of his ' Fungi parasitic! Scandinavici exsiccati ' Herr J. Eriksson gives 

 the following diagnosis of this new genus : — Hyphee fertiles e mycelio 

 endophyllo assurgentes, breves, simplices, basidioideas, apicem versus 

 incrassatse, ibique (3-) 4 ramis conidiigeris coronate, demum replica tae, 

 deciduisque conidiis cicatricosae. Conidia globosa, fuliginea, levia. It 

 is most nearly allied to Stachyhotrys, Periconia, and CephalotricTium. 

 H. Thalictri grows on TliaUctrum flavum. 



Lactarius piperatus.f — MM. E. Chodat and P. Chuit describe the 

 anatomical structure and chemical properties of Lactarius piperatus 

 Scop. It is of a dull whitish yellow colour, the lamellae being slightly 

 deeper. The fungus is compact and hard, and the fracture irregular but 

 not fibrous. The authors succeeded in obtaining from the fungus a 

 substance with a very biting taste, to which they have given the name 

 of piperone. It is soluble in alcohol, ether, and chloroform, and becomes 

 fluid at 100°. L. piperatus ought not then to be eaten without being 

 prepared in a manner that will cause it to lose its acridity. 



Mycetozoa. 



Myxomycetes of Denmark.:]: — Herr C. Eaunkia3r proposes the 

 following classification of the Myxomycetes : — 



A. Without capillitium. 



I. HOMODBRME^. 



Liceacese (^Tuhulina, Lindbladia). 

 II. Heterodeeme^. 



ClathroptychacefB [Enteridium, Clatliroptychium). 

 Cribrariaceae (Cribraria, Dictydium). 



B. With capillitium. 



III. COSLONEME^. 



Arcyriaceae (PericJisena, Lachndbolus, Arcyria, Gornuvia, 



Lycogala). 

 Trichiaceae (JSemiarcyria, Trichia^. 



IV. SlEREONEMEiE. 



Physarace^ (Badhamia, Physarum, Tilmadoche, Fuligo, 



Le'ocarpus, Crateriuin). 

 Didymiaceae (JJhondrioderma, Lepidoderma, Didymium, 



Spumaria). 

 Stemonitacea; {Lamproderma, Enerthenema, Anr.yrophorus, 



Comatricha, Stemonitis, Brefeldia, Beticularia). 



The Danish species, 96 in number, are described in detail, and a 



* Landwirthsch. Jahrb., 1888, 35 pp. and 4 pis. See Bot. Centralbl., xxxviii. 

 (1889) p. 827. 



t Arch. Sci. Phys. et Nat., xxi. (1889) pp. 385-403 (1 p].). 



X Bot. Tidskr., xvii. (1888) 88 pp. and 4 pis. See Bot. Centralbl,, xxxyiii. 

 (1889) p. 676. 



