Dec. 1893.] BOTANICAL SOCIETY OF EDINBURGH. 57 



Acacia faknesiana, Willd. 



Au exceedingly common shrub, amongst the brush by 

 the river bank. The flower balls, which are of a deep 

 yellow, last only a very few days. In flower 15th-25th 

 July. The Argentines of our expedition called this plant 

 Espinillo, a name common, however, to almost all shrubby 

 acacias. This was the first of the acacias to flower. The 

 flowers are most beautifully perfumed. 



Acacia teaecox, Griseb. 



A low tree 10-15 feet in height, frequent in the monte- 

 citos around Fortin Page. 



A well-marked variety of this species seems to be 

 becoming developed, characterised by its very straggling, 

 almost climbing habit, and the (no doubt correlated with 

 this) more numerous and more recurved spines. 



The trees burst into a mass of bloom about 12th 

 Aug., continuing in flower until about the end of tlie 

 month. Each tree in flower exhaled a most delightful 

 perfume, which could be perceived a long distance off, and 

 proved a great attraction to insects and humming birds. 

 The flowers were produced before the foliage. Fruit 

 1st Dec. 



PiTHECOLOBIUM MULTIFLOHUM, Benth. 



Prov. Arg., Tinibo hlanco. 



A tall, slender tree, exceedingly abundant along the 

 river banks in low-lying situations in the Chaco. Trees of 

 this species lost their leaves entirely during the winter. 

 The new leaves burst forth about the 1st Aug., but 

 many of the trees were again stripped of foliage by the 

 frosty night, about 6 th Aug. A large specimen had a 

 circumference of 7 feet, at 4 feet from ground. 



The heartwood is white and very brittle — quite useless 

 as a timber. The tree is much affected by two species of 

 Lovanthacccc. 



Fl. 27th Sept.-Oct. 



Eugenia glaucescens, Camb. 



Hab. — Montes on Pio Pilcomayo. 



TiBOUCHIXA, cfr. T. sebastianopolitana, Cogn. ? 

 Hab. — Pdo Pilcomayo. 



