The Scottish Naturalist. 297 



(so far as I have seen) a deflexed terminal twig. The reaction 

 by K on the medullary fibres, and even on a section of the axis 

 itself, is peculiar, inasmuch as a purplish-red is produced without 

 any preceding yellow reaction. This would seem to indicate an 

 identity in composition of the substance giving rise to the colour 

 with that in many of the Placodia, and as such is singular in 

 members of the genus Usnca. The reaction is not seen through- 

 out, but only on sections which show a yellowish colour within. 

 In these circumstances I have considered it necessary to preface 

 the diagnosis of this species (if indeed it is such) by these ex- 

 planatory remarks. The plant seems in robust healthy life. 



Usnea fruticosa sp. nov. — Similis U. Thomsoni sed receptacula 

 apotheciorum apice rami plerumque appendiculata ; axis 

 gracilis pallidus, fibrillar medullares laxe arachnoideae I — , 

 K hinc hide rubro - purpurascentes ; annulus subcortical 

 crassus corneus ; sporae .012-. 017 X.008-.011 mm. 



Corticola in Himalaya (Sikkim), altit. 12,000 pedum (D r G. 

 Watt), No. 7076. 



Eutnitria formosa sp. nov. — Similis Eu. Baileyi sed annulus 

 subcorticalis flavescens nee rufescens ; fibrillar medullares 

 K — C flaventes. Thallus extus K — C flavens. 



In Montibus Australian "Peak Range" (Slatter). Ex hb. Baron 

 F. v. Miiller. 



( To be continued. ) 



THE GAELIC NAMES OF PLANTS, 



By JOHN CAMERON. 



{Continued from p. 278.) 



LyCOPODIACEjE. 



Lycopodium, from \vko%, a wolf, and ttovs, a foot, from a fan- 

 cied resemblance to a wolf's foot. 



L. Selago — Fir club-moss. Gaelic : garbhag an skibhe, the 

 rough one of the hill. " The Highlanders make use of this 

 plant instead of alum to fix the colours in dying. They also 

 take an infusion of it as an emetic and cathartic ; but it operates 

 violently, and, unless taken in a small dose, brings on giddiness 



