SHORT NOTES. 479 may perhaps be a cross with R. tomentosa, though I did not see that near. — Edward S. Marshall. MiMULus Langsdorffii Donn in Berkshire. — The plant recorded as M. luteus by Kev. W. M. Kogers in this Journal for 1887, p. 342, from Hampstead Norris, in Berkshire, where it was, he says, " a well-established alien," belongs to the above species; as does the plant from Bognor Marsh, where it exists in very large quantity, and also the plant which I gathered with Imjjatietis hifiora by the Emborne Stream in 1891. In this locahty it occurs in both Berk- shire and Hampshire. Probably the Miviuhis luteus of most of our British localities belongs to M. Langsdorjfii, the North American plant. Prof. E. L. Greene, of the Catholic University, Washington, whose interesting paper on M. Langsdorjfii in this Journal for 1895, pp. 4-8, suggested to me the examination of our British forms, has confirmed the above name. — G. C. Druce. Nanomitrium tenerum Lindb. — On September 6th last I noticed a considerable quantity of this little moss on Ashdown Forest, near Crowborough, Sussex, where it was growing on the mud of a large shallow pond, which had been left bare by the drought. It was growing in rather dense tufts, and, as described by Philibert [Revue Bryologique, 1878, p. 26), it frequently affected the cracks in the mud. iV. tenerum [Ephemerum tenerum of Schimper's Synopsis) does not appear to have been recorded from Britain since its original discovery by Mr. Mitten in 1854. Its existence must be somewhat precarious, as on revisiting the locality a week later I found it almost entirely submerged, and there was considerable difficulty in procuring specimens. The absence of the protonema, at least when the plant is mature, gives it an appearance when growing very unlike that of any species of Ephemerum ; indeed, the protonema is only to be seen on looking for it very closely in the neighbourhood of quite immature plants. Its identity has been confirmed by Mr. H. N. Dixon and by M. Husnot, who kindly sent me French specimens for comparison. — W. E. Nicholson. Bartsia Odontites var. littoralis Reichb. in Britain. — Last July I sent Mr. Arthur Bennett fresh specimens of a Bartsia which he named as above. It is the Odoyitites littoralis Fries. It grows in some quantity, mostly on a shingly shore, on that part of the west coast of Argyllshire included in v.-c. 97. It is at once notice- able by its distinct habit, the stem being simple or with a few straight branches. From a list of twelve European references which Mr. Bennett kindly supplied me I find that it is given as a species in seven cases, a subspecies in two, and a variety in three. Nyman, in Consp. Ft. Eur. and in the Supp., makes it a subspecies of Odontites verna (P.) Reichb. It is found on the coasts of Denmark, Sweden, Norway, S.W. Finland, N. Germany, Holland, and in the saline districts of E. Germany, but has not been previously recorded for this country. — Symers M. Macvicar. West Perth Plants. — While we were staying at Callander last summer, my son, F. A. Rogers, brought me a fresh specimen of Lycopudium inimdatiim that we had gathered on Ben Ledi, a species
