Alnas incana Willd. in Co. TyroneAuthor(s): Thomas GreerSource: The Irish Naturalists' Journal, Vol. 6, No. 8 (Mar., 1937), p. 195Published by: Irish Naturalists' Journal Ltd.Stable URL: http://www.jstor.org/stable/25532687 .

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March, 1937.] The Irish Naturalists' Journal. 195

Another small area of salt-marsh is recorded near the cause

way which joins Mahee Island and Reagh Island. Here there was typical Glycerietum with hummocks of Glyccria maritima, and the other halophytes noted were Limonium humih (L.H.), Aster Tripolium (A.T.), Salicornia herbacea (SAL) and Suacda maritima (D.M.); the last two spread to the muddy shingle beyond the Pelvetia zone. Gelatinous clumps of the Blue-green alga,

Rivularia atra (Biv), were abundant on the surface of the marsh.

The algal vegetation of Mahee Island was not examined in detail, but at various points where records were made the zonation was similar to that of Skettrick Island which was mapped in detail.

REFERENCES.

(1) Lynn, M. J.? I.X.J., vol. VI, no. 5, 1936.

(2) Clapham, M.?I.NJ., vol. Ill, no. 3, 1930.

(3) Lynn, M. J.?7.A\/.. vol. V, no. 11, 1935.

(4) Batters, E. A. L.~" A Catalogue of British Marine Algae." Journal

of Botany, vol. 40, 1902.

(5) Lynn, M. J.?I.N.J., vol. V, no. 8, 1935.

Department of Botany, Queen's University, Belfast. Feb., 1936.

BOTANICAL NOTES.

ALNAS INCANA WILLD. IN CO. TYRONE.

With reference to the note by Mr. A. W. Stelfox in I.N.J., vol. V, p. 308, I have observed this Alder for a number of years in this district

<E. Tyrone). It grows generally on cut-away, damp bogs among Sallow, Birch and the ordinary Alder. In one bog the damper portions are dotted over with the seedlings, varying from a few inches to

good sized bushes. It appears to be thoroughly naturalised in such situations.

Sandholes, Dungannon. 10-10-36. THOMAS GREER.

! GERANIUM PUSILLVM L. IN CO. KERRY.

I Wish to record the linding of a few specimens of this plant at

Waterville, on the side of the lane leading from the front, past Breen's

Hotel, to the Lake. Though looked for elsewhere in the neighbour hood it was not seen. A specimen was lodged in the National Museum, Dublin.

Universitv College, Dublin. Jan., 1937. JOSEPH DOYLE.

I UNCUS ACUTUS LINN. IN CO. DUBLIN.

I am glad to be able to record an extension of the range of Juncus

acutus, not previously found north of Wicklow Head. Mr. H. J. Hudson

has shown me two fine clumps on the North Bull, about 300 yards north-east of The Farm, in a swampy patch in the centre of the Royal Dublin Golf Links.

The North Bull has, unfortunately, been the scene of so many deliberate introductions that all new discoveries in that area are

naturally suspect. All I can claim is that if J. acutus were to extend

its range naturally, the Bull is the first possible ground closely

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