157 



of Mustard-seeds. In colder countries these plants are 



only of one year's duration. Numerous other species, all 



highly ornamental, occur in South America and a few also 

 in Mexico. 



Trophis Americana, L. 



West Indian Archipelagus. The foliage of this milky tree 

 has been recommended as food for the silk-insect. In Cuba 

 and Jamaica it is used as provender for cattle and sheep. 



Tuber aestivum, Vittad. 



The Truffle mostly in the markets of England. The white 

 British Truffle, Chairomyces meandriformis, Vitt., though 

 large is valued less. In the Department Vaucluse (France) 

 alone about 60,000 Ibs. of Truffles are collected annually at 

 a value of about 4000. Many other kinds of Truffles are 

 in use. Our own native Truffle, Mylitta australis, Berk., 

 attains sometimes the size of a Cocos nut, and is also a fair 

 esculent. It seems also quite feasible to naturalize the best 

 of edible fungi of other genera, although such may not be 

 amenable to regular culture. 



Tuber cibarium, Sibthorp. 



Middle and South Europe. The Black Truffle. Like all 

 others growing under ground, and generally found in forest- 

 soil of limestone formations. It attains a weight over 1 Ib. 

 Experiments for naturalization may be effected with every 

 prospect of success by conveying the Truffle in its native 

 soil to us, and locating it in calcareous places of our forest- 

 regions. As condiment or merely in a roasted state it 

 affords an aromatic food. T. melanosporum, Vitt., from 

 France, Germany and Italy, is of a still more exquisite 

 taste than T. cibarium, indeed of Strawberry flavor. Again 

 T. magnatum, Pico, from Italy, is of delicious fragrance. 



Ullucus tuberosus, Lozano. (Mettoca tulerosa, Lindl.) 



Andes of New Granada and Peru, up to an elevation of 

 9000 feet. A perennial herb, the tubers of which are edible. 



Urglnia Scilla, Steinheil. (Scilla maritima, L.) 



South Europe, North Africa. The medicinal Squill. The 

 plant needs not regular cultivation, but settlers living near 



