406 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Cultural Study of Sterigmatocystis.* — The fungus Sterigmatocystis 

 Sydowi sp. n. was found by G. Bainier and A. Sartoiy, and subjected to 

 various culture experiments. It grew best on banana and carrot, and it 

 is not pathogenic. Details are given as to its behaviour in various tem- 

 peratures, etc. A morphological peculiarity is the production of enor- 

 mous chlamydospores on the hyphae. While the capitulum measures 

 at most 15-18 fx in diameter, and the globose spores 2 /x or 3 /x, the 

 intercalary chlamydospores are up to 45 /x in diameter, and are full of 

 fat-globules and glycogen. 



Thermophilous Fungi. j — A. Sartory and H. Sydow describe a 

 mould, Aspergillus Sartory i sp. n. ; and A. Sartory alone gives an account 

 of PeniciUium gratioti, both of which were found covering parts of the 

 interior of the gold-mines in Johannesburg at a depth of 2000 feet, and 

 with a temperature of 113° Fahrenheit. The fungi grew on places that 

 had been watered by a sugar solution with a view to allay the dust, 

 which is a source of danger to the miners in causing lung troubles. 

 They describe the behaviour of these moulds on different substrata. 

 Neither of them are pathogenic. 



Two Species of Fusarium.J — There is a great deal of uncertainty 

 as to the limits of species in this and allied genera. Edmond Gain and 

 Brocq-Rousseu have taken two species, Fusarium Solani and F. roseum, 

 which they have studied from every point of view. In doing so they 

 have been able to assign to each certain physiological characteristics which 

 support those that are purely morphological. They suggest that similar 

 experiments with other species would assist in clearing up the different 

 views regarding these fungi. 



Fusarium nivale.§ — This Hyphomycete forms sporodochia on the 

 leaves of cereals, especially on rye, but also on clover and other herbage. 

 The perfect fruiting form has been determined by E. Schaffnit to be 

 Calonectria nivalis^ which grows on the same substratum. The fungus 

 is a facultative parasite and may cause considerable damage. 



Myrioconium Scirpi.|| — C. Ferdinandsen and 0. Winge have 

 studied this fungus previously described by them as Sphacelia scirpicola. 

 Sydow, who had again described it, placed it among the Melanconiaceae. 

 It forms small round spores at the tips of simple sporophores. 

 It is the conidial condition of a Sclerotinia species, but it is more nearly 

 allied to the Tuberculariaceag than to the Melanconiaceae. Sclerotia 

 were found on a specimen of Scirpus lacustris, the host of the fungus, 

 and from these the Peziza form was obtained. The groups of conidio- 

 phores are developed in the outer tissue layers of the Scirpus stalk ; the 

 sclerotia are formed in the interior. 



* Ann. Mycol. xi. (1913) pp. 24-9 (1 pi.). 



t Ann. Mycol., xi. (1913) pp. 156-65 (2 pis.). 



X Eev. Gen. Bot., xxv. (1918) pp. 177-94. 



§ Mycol. Centralb]., ii. (1913) pp. 253-8 (2 figs.). 



II Ann. Mycol., xi. (1913) pp. 21-4. 



