Naturalisation in Extra-Tropical Countries. 49 



leaves are periodically pulled, up-hoeing is resorted to as in potatoes 

 and beet, when the roots will attain a large size. The town of Kala- 

 mazpo, on the shores of Lake Michigan, owes its existence to the 

 cultivation of Celery in the swampy soil of the neighbourhood, the 

 annual export having a value of 50,000 [Semler]. The fruitlets are 

 occasionally utilised for condiment. Seed'will keep for several years 

 in cool climes, and it will ripen even in the hottest and driest regions 

 of Australia under horticultural care. Much used by the ancients 

 for wreaths. 



Apium prostratum, La Billardiere. 



The Australian Celery. Extra-tropical Australia, New Zealand, 

 Extra-tropical South-America. This also can be utilised as a culi- 

 nary vegetable, but not in a raw state. 



Apocynum cannabinum, Linn. 



North- America. A perennial herb. This is recorded among 

 plants yielding a textile fibre of silky gloss and considerable dura- 

 bility. A. androsgemifolium (Linne) yields medicinally the " Bitter 

 Root " of the United States, that of A. cannabinum being likewise 

 therapeutically valuable. Both plants bear the clime to 60 N. lat. 

 in Norway [Prof. Schuebeler]. The drug value depends on the 

 Apocynin, a potent diaphoretic solvent and laxative, also as an 

 eliminator, particularly advocated in hydrops, employed also in gout. 



Aponogeton crispus, Thunberg. 



From India to New South Wales. The tuberous roots of this 

 water-herb are amylaceous and of excellent taste, though not large. 

 The same remarks apply to A. monostachyos (Linne fil.) and several 

 other species, all from the warmer regions of the Eastern hemi- 

 sphere. 



Aponog-eton distachyos, Thunberg. 



South- Africa. This curious water-plant might be naturalised in 

 ditches, swamps and lakes, for the sake of its edible tubers. The 

 scented flowering portion of this plant affords spiuage. For a full 

 account see Paillieux and Bois in "Bulletin de la Societe d' Accli- 

 matation," 1888, pp. 782-786. 



Aquilaria Agallocha, Roxburgh. 



Silhet and Assam. A tree of immense size. It furnishes the 

 fragrant calambac- or agallochum-wood, known also as aggur or 

 tuggur or the aloe-wood of commerce, famed since ancient times. 

 The odorous portion is only partially distributed through the stem. 

 The best quality of the so-called Eagle-woodirregular masses found 

 inside the stems of old trees fetches as much as 30 a cwt. [Dr. 

 G. Watt]. 



