568 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Mnium medium, on account of its synoicous inflorescence. In this con- 

 clusion he is confirmed by Dr. Hagen, who points out that the specimen 

 possesses all the more stable characters of the species — structure of stem 

 and nerve, form of leaf, and structure of leaf -teeth, which, near the 

 basal margin, consist sometimes of one, sometimes of two cells ; and 

 shows how the Ben Lawers specimen differs from other species — e.g. 

 31. affine and M. cuspiclatum. The species is an addition to the British 

 flora, and, curiously enough, Hypiium turgescens, another addition to 

 our flora, was gathered on the same day upon Ben Lawers. 



New Plagiochila from Ireland.* — F. Stephani describes and figures 

 two new species of Plagiochila from Killarney — P. Oivenii and P. Jcil- 

 larniensis. The latter was published and figured last year by W. H. 

 Pearson,t but Stephani has discovered further details which require 

 explanation. He also publishes new names for three exotic species of 

 Plagiochila described in his monograph of the genus in his Species 

 Hepaticarum. 



Worcestershire Mosses.J — J. B. Duncan enumerates seven mosses 

 which are additions to J. E. Bagnall's Worcestershire moss list published 

 in 1908. One of these is Amblystegium compaction, which in Britain 

 had previously been recorded only from damp calcareous stations in 

 Sutherlandshire and Derbyshire ; it has now been demonstrated to occur 

 on dry, slightly calcareous, triassic sandstone in Worcestershire. An- 

 other unexpected record is Andrecea Rothii on similar sandstone only 

 200 feet above sea-level. New stations for five previously recorded 

 species are added. 



Yorkshire Bryophyta.§ — W. Ingham gives a list of 44 hepatics grow- 

 ing around York within a circle of 20 miles radius. At a somewhat 

 greater distance are found Petalophyllum Ralfsii, Pallavicinia Flo- 

 towiana, Scapania subalpi/ia, S. rosacea, and Jubula Hutchinsioz. Of 

 the Sphagnaceas he gives lists with field-notes for Skipwith and 

 Strensall Commons, and other localities. For the mosses he describes 

 the habitats in which several species and varieties are found on 

 Skipwith Common and Jackdaw Crag Quarry, and adds a list of 112 of 

 the less common species occurring within 20 miles of York. 



North American Bryophyta.|| — C. C. Haynes gives a list of 48 

 hepatics collected near Little Moose Lake, in the Adirondacks ; and 

 A. M. Smith a list of 103 mosses from the same district. B. D. Gilberts 

 publishes notes on two anomalies : first, Leucooryum glaucum growing 

 in spheroidal cushions entirely unattached, as it often does in this 

 country ; and, secondly, a fine growth of Sphagnum acutifolium var. 

 quinquefarium on a steeply-inclined bare rock kept moist by a slight 

 trickle of water. A. J. Grout** issues Part III. of his "Mosses with 

 Hand-lens and Microscope," giving a richly illustrated and rather 



* Hedwigia, xlv. (1906) pp. 213-14. 



t Jouru. of Bot., xliii. (1905) p. 281. J Op. cit., xliv. (1906) pp. 243-4. 



§ Handbook to Brit. Assoc, York, 1906, pp. 300-14. 

 || Bryologist, ix. (1906) pp. 62-6. 1 Tom. cit., p. 72. 



-** Brooklyn, New York, pp. 167-246 (20 pis. and 55 figs.). 



