494 Select Plants for Industrial Culture and 



be amenable to regular culture ; thus efforts should be made for 

 the introduction of all the superior kinds of truffles, as an insight 

 into the manner, in which vegetables of the fungus-species might be 

 transferred to wide distances, has gradually been obtained. The 

 total value of the export of truffles from France in 1877 amounted 

 to considerably over half a million pounds sterling, the total pro- 

 duction in that year being valued at about 800,000. The annual 

 revenue of the truffle-ground of Carpentras is, according to Sim- 

 monds, 80,000. The great White North-American Truffle (Tuber 

 album) is as white as snow and as tender as curds [Millington]. 



Tuber albidum, Caesalpini. 



Occurs with T. a3stivum, but is smaller and less agreeable in 

 taste. 



Tuber cibarium, Sibthorp. 



The Black Truffle. Middle and Southern Europe. Like all 

 others growing underground, and generally found in forest-soil of 

 limestone-formation. It attains a weight of over one pound. 

 Experiments for naturalisation may be effected with every prospect 

 of success by conveying any truffle in its native soil and locating it 

 in calcareous places of forest-regions. As a condiment or merely 

 in a roasted state, it affords an aromatic food. The famous Quercy- 

 or Perigord- Truffle is derived from this species. T. melanosporum 

 (Vittadini) from France, Germany and Italy, is of a still more 

 exquisite taste than T. cibarium- indeed, of strawberry-flavor. 



Grey Truffle. South -Europe. One of the most esteemed of all 

 truffles, with some garlic-flavor. Hymenogaster Bulliardi (Vitta- 

 dini) "and Melanogaster variegatus (Tulasne) of South-Europe are 

 also excellent truffles. 



Tuber rufum, Pico. 



Southern Europe, extending to Britian. Red Truffle, especially 

 in vineyards. Much used for food, but smaller than Terfe/ia- 

 Truffles. 



Tulipa Gessneriana, Linne. 



Caucasus and adjoining regions. The alkaloid of this popular 

 garden-plant is a very powerful Sialogogue [Prof. Ringer]. 



Typha latifolia, Linne. 



The Cattail, large Reedmace or Bulrush. Widely distributed 

 over the northern hemisphere in Norway to lat. 60 41 '. Worthy 

 of being encouraged in its growth on rivers and around lakes, and 

 of being transferred to unutilised waters, as the very light and soft 

 foliage can be converted into material for mattresses, which in the 



