Half-Hardij Plants in Arrav. 395 



Strabane, Brodick. The Broad-leaf Acacia (J . |)?/cwa7i!!/ia) 

 grows at Craigyard. 



Miscellaneous Plants. — The broad-leaved Chinese Fir 

 (Cunninghamia sinensis) , the New Zealand Bramble [Buhus 

 australis), Pittosporum undulatum, whose flower is so 

 fragrant, and the oak or Beef Wood (Casuarina equiseti- 

 folia), all grow in the Castle Garden, Brodick, (yaraellias. 

 Myrtles, and Desfontainea spinosa (7 feet 8 inches high), 

 all bloom freely at Cromla, Corrie. Agalina tomentosa 

 has just been planted at Craigyard, Lamlash. I have also 

 plants of the Bottle Tree of Australia {Brachychiton diver- 

 sifolium), the Grass Tree of Australia {Xantliorrlioia arhorea) 

 of Libertia grandiflora, and of a Dasylirion from Mexico, 

 which I hope ere long to transfer to Arran. 



The Marine Algce of Jojjpa, in the County of Mid-Lothian. 

 By George Wm. Traill. 



(Read 8th April 1886.) 



I have prepared the following paper, in the hope that it 

 may be useful to those of our members who are com- 

 mencing the study of marine algae ; and also that others 

 may be induced to turn their attention to this branch of 

 botany when they learn how many rare and beautiful 

 species await them at a locality so easy of access as the 

 rocks of Joppa. 



Before giving the list in detail, it may be interesting to 

 refer to several species which, on account of their rarity 

 and luxuriance, may be viewed as specialties of this 

 locality. 



Of these, Sphacelaria plumigcra holds a prominent place. 

 This occurs in muddy pools near low water, almost 

 immediately below the salt works. The species is 

 perennial, and unilocular sporangia are found in winter. 

 Agardh, in writing to me, states that he never saw any 

 specimens so perfect as those I sent him from Joppa. 



Owing to the rigidity and dryness of the plant, — features 

 which it possesses in common with the other members 

 of the genus, — it does not readily adhere to paper ; but 



