136 Yorkshire Naturalists at Robin Hood's Bay. 
Fungi (F. A. Mason) -Owing to the advanced condition of the 
vegetation, many species of parasitic fungi were in evidence. Flowers 
of the Red Campion were found with anthers heavily infected by the 
smut, Ustilago violacea. Small plants of the Barren Strawberry consisting 
of only a few young leaves were seen covered almost entirely with the 
caeomata of Phragmidium Fragariastri. On Blackberry, Phv . violaceum 
occurred on last year’s leaves, while the aecidial stage of the same species 
was fairly common on the shoots and stems. Among other Uredines 
collected were 
Uromyces Ficariae and U. Poae, on R. Ficaria. 
U. Dactylidis on Ranunculus repens. 
Puccinia Leontodontis on L. autumnalis. 
P. vaviabilis on Taraxacum officinale. 
P. Menthae on M . aquatica. 
P. Primulae on P. vulgaris. 
P . Violae on V . Riviniana . 
P . obscura on Beilis perennis. 
P . oblongata on Luzula maxima. 
P. holcina on Holcus mollis. 
Melampsora Euphorbiae on Euphorbia sp. 
Several parasitic species belonging to the phycomycetous genus, 
Peronospora, were seen, including P. calotheca on Asperula odorata, 
P. Chrysosplenii on C. oppositifolium and P . Lamii on Lamium, and on 
Mentha. 
The powdery mildew of the Hawthorn, Podosphaera leucotricha 
was observed in its conidial stage, (Oidium farinosum) , already destroying 
the young shoots in the hedgerows. 
The Discomycetes collected were mostly common species and only 
two or three need be mentioned. Mollisia atrofusca occurred on dead 
herbaceous stems, and Sclerotinia tuber osa on the roots of the Anemone ; 
a fine gathering of Otidea coccinea was made by Mr. J. L. Illingworth, 
in the wood-bottom at Fylingdales. Among the more minute species, 
Coccommces dentatus Sacc., was found on fallen Oak leaves. 
The Bog Myrtle and the ground vegetation of the marshes at Foulsike 
provided abundant material for mycological study, and fine examples 
of the root -nodules of Myrica Gale were obtained. These nodules, 
sometimes listed as ‘ galls,’ are presumably caused by organisms which 
function as symbionts with the plants on which they occur. Although 
they have been the subject of much research by Frank, Bottomley, 
Shibata, R. Maire and others during the last forty years, nothing definite 
is known of the specific nature of the organism involved in the formation 
of the nodules, and it has been variously placed among the Hyphomycetes, 
the Actinomycetes and the Bacteriaceae respectively. It is known as 
Frankiella Brunchorsti (Moll.) Maire, and it is an addition to our 
Yorkshire list. 
Phyllosticta Oxycocci Henn., and Cytospora V accinii Died, were found 
on dead leaves of Cranberry. 
Phoma samar arum Desm. was fairly common on Ash fruits. 
The only noteworthy species among the larger fungi collected were 
the puff-balls, Lycoperdon pyriforme var. excipuliforme , and Bovista 
nigrescens . 
Ten species of Myxomycetes were gathered and among them Badhamia 
panicea and Stemonitis flavogenita ; Trichia varia occurred parasitised by 
Stilbella tomentosa. 
Mr. W. P. Winter afterwards forwarded a small gathering of specimens 
from Falling Foss among which, the following species may be noted : — 
Corticium Sambuci, Puccinia Adoxae Hedw.f., Bertia Moriformis de Not., 
Nectria ditissima Tul., Phoma Ruborum Westend., and the Myxomycete, 
Trichia persimilis Karst. 
The Naturalist 
