3-36 SELECT PLANTS FOR INDUSTRIAL CULTURE 



excellence for cakes, also yielding a superior grain for peeled! 

 Wheat. For preparing the latter it is necessary to collect 

 the, spikes while yet somewhat green, and to dry them in 

 baking-houses. 



T. dicoccum {Sch.ra.nk) . {T. am^leum, Ser.) The Emmer Wheat. 

 Its varieties are content with and prolific on poor soil, produce 

 excellent starch, are mostly hardy in frost and not subject to 

 diseases. To this belongs ihe Arras Wheat of Al)yssinia, 

 where a few other peculiar sorts of Wheat are to be founrl. 

 A large-grained variety of Wheat is baked in Persia like 

 rice (Colvill). 



T. monococcum (L.). St. Peter^s Com, which is hardier than most 

 other Wheats ; exists in the poorest soils, but produces grains 

 less adapted for flour than for peeled Wheat. 



Tropseolum majus, Linn^. 



Peru. This showy perennial climber passes with impropriety 

 imder the name of Nasturtium. The herbage and flowers 

 serve as cress, and are also considered antiscorbutic. A 

 smaller species T. minus (L.), also from Peru, can likewise be 

 chosen for a cress-salad j both besides furnish in their flower- 

 buds and young fruits a substitute for capers. A volatile 

 oil of burning taste can be distilled from the foliage of both, 

 and this is more acrid even than the distilled oil 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. 



TvopsBolum sessilifolium, Poeppig. 



Chili. Among the species of this genus one of the most 

 eligible for its tubers, which can be consumed even in a raw 

 state, and are larger than those of most other Tropaeolums, 

 while the stems are short and procumbent (Philippi). 



Tropseolum tuberosum, Ruiz and Pavon. 



Peru. The tuberous root serves as an esculent. 



Trophis Americana, Linn^. 



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, Vittadini. 



The Truflle most in the markets of England. The White 



