15 1 34 Proceedings of the Royal Irish Academy. 



addition to the Irish flora ; but it is not unlikely that it has often been 

 collected as a variety of G. corneum, though no record of the fact has been 

 found. 



Phyllophora Brodiaei J. Ag. 



A boreal species. Not previously collected on the west coast, but known 

 from the north of Ireland, Scotland, and northern England. 



All the specimens labelled P. Brodiaei from the south of England in the 

 Kew and British Museum herbaria are misnamed, being forms either of 

 P. palmettoid.es or P. rubens, and there is little doubt that the same applies to 

 other south coast records (cf. Batters, '02, p. 65). 



Callymenia Larterae Holmes, Journ. Bot., '07, p. 86. 



Several plants washed ashore on Clare Island in October, 1910, have 

 been determined by Mr. Holmes as belonging to this species. The plant is 

 characterized by the tapering base of the frond and its repeated proliferous 

 branching. It has doubtless been overlooked in the past as a variety of 

 G. reniformis. 



Gracilaria confervoides var. procerrima (Turn.) Batt. 



Amongst the many forms assumed by this species, this variety is one of 

 the most distinct. It is doubtless the same as Harvey's variety longissima, of 

 which he remarks : " Var. /3 is often 6 feet long, and quite simple, or with a 

 few short lateral ramulae. Its peculiarities appear to result from its place of 

 growth (Charlestown Harbour, Bhode Island), and intermediate forms connect 

 it with the ordinary much-branched varieties." The Irish species confirm 

 Harvey's opinion. They were dredged in Clew Bay, though some fine 

 specimens 5 feet long were gathered by hand in the channels in Achill Sound. 

 The amount of branching varies considerably ; but the short subulate 

 ramulae are almost constant. Probably common in Ireland, but no record 

 found. 



Nitophyllum uncinatum J. Ag. 



This species is usually regarded as synonymous witli N. Imcratum var. 

 uncinatum — an error which is due to the citation of a false synonym in the 

 original description. The plant was described by J. Agardh in 1852. He 

 states that it is not uncommon in the Mediterranean, and was characterized 

 by the possession of acuminate fronds and of occasional uncinate branches ; 

 thesori were produced immediately behind the apex of special short branches. 

 Unfortunately, Agardh quoted N. laceration var. nucmatum, which is a 



