90 JOURNAL OF THE ARNOLD ARBORETUM |vol. iv 



that the wood of these Wattles would be valuable as fuel for the locomotives, 

 but the railway grades are steep and the calorific quality of the wood is 

 too low for the intended purpose and the experiment is a failure. On 

 the Nilgbiri Hills these Acacias grow freely and so too does the Silver 

 Wattle (A. dealbata Link). The latter owing to its suckering proclivities 

 has become a pest though it is serviceable in preventing landslides on 

 railway embankments and dykes. Gardens owe much to Australia for 



its lovely Acacias. 



long if ol 



Willd.,.4. pycnantha Benth.,J. pubescens R. Br. and A. dealbata Link, being 

 among the choicest trees grown in southern California and in the Medi- 

 terranean region. Two Palms, Howea (Kentia) Belmoreana Becc. and 

 H. Fosteriana Becc, indigenous on Lord Howe Island off New South 

 Wales, are indispensable to florists of the North. In South Africa the 

 Western Australian Acacia saligna Wendl. with Pinna pinaster Ait. has done 

 much towards reclaiming the sandy flats behind Cape Town. The Aus- 

 tralian Albizzia lophantha Benth. is also a useful plant in northern gardens 

 under glass and so, too, is the Norfolk Island Pine (Araucaria excelsa R. 

 Br.). The Bunya Bunya {A. Bidwillii Hook.), flourishes near Darjeeling 

 in north India and on the Nilghiri Hills in the south. In Natal these two 

 Araucarias with A. Cookii R. Br. and A. Cunninghamii Sweet are likely 

 to be of value in forest planting. Curiously enough the Chilian Pine {A. 

 imbricata Pavon) does not do well in Australasia nor in South Africa but 

 in Kenya Colony at about 7000 feet altitude the Brazilian species (/l . 

 bratiliensis A. Rich.) grows faster than any other exotic Conifer. I should 

 think WiaXFitzroya patagonica Hook, f., which is one of the most magnificent 

 timber trees of the temperate regions of South America, would be well 

 worth trying in parts of New Zealand and in southeastern Australia where 

 summer or all the year round rainfall obtains. 



trees 



adendron 



Br.) and the Cape-chestnut (Calodendron capense Thunb.) are occasionally 

 m. In eastern Australia the latter is one of the favorite exotic 



flowering trees. The trees of New Zealand are equally unimportant to 

 the North. The Kowhai (Sophora tetraptera Ait.) is occasionally grown 

 and some of the Nothofagus are planted in England where their growth in 



aces 



species. For gardens the only really outstanding New Zealand tree is 

 Gaya Lyallii Bak. f . whose masses of pure white flowers are a feature of 

 some of the gardens in favored spots in Great Britain. Two Monocoty- 



ledons (Cordyline australis Hook. f. and C. indivisa Steud.) are most 



useful garden plant sin California, the Mediterranean region and even thrive 

 in Cornwall and in the Scilly Isles. In the southern hemisphere and 

 notably in Australia and South Africa there are a great number of shrubs 

 and small trees of great value to the gardens of warm sunny northern 

 lands but for forest planting very few southern trees are likely to be of 

 value north of the Tropic of Cancer. 



