34 On the different Species, tyc. of the Genus Brassica. 



tice, have induced me to adopt their appellation. " This 

 plant," says M. Nestler, " is often cultivated on hilly ground, 

 where the Winter Navette does not succeed ; as the seed is 

 much smaller its produce scarcely exceeds one half of the 

 latter ; its seed is lightly thrown into the ground, mixed with 

 that of other plants, such as Lettuces, &c. and requires more 

 space than the Winter Navette to produce a certain number 

 of seed-pods, for if confined for room it has scarcely any." 



" Near and about Strasbourg, however, it is less cultivated 

 than the other. Its seed is equally useful in the preparation 

 of oil, for no distinction is made between the oil of the sum- 

 mer and the winter Navette confounded together under the 

 name of Reps 6hl, which is particularly used for lamps, after 

 having undergone the necessary process of purification by 

 Thenard's method." At present we know of no variety of 

 the Brassica prcecox, having a fleshy and tuberous root, as in 

 the preceding species, but it is probable from analogy that it 

 might be susceptible of the same developement. 



Messrs. Waldstein and Kitaibel* think that the Brassica 

 elongata might be cultivated with success as an oleiferous 

 plant. This species, known by the extraordinary peduncle 

 of the seed-pod rising above the discus, has several chances of 

 succeeding ; in the first place, it is of a robust nature, and 

 thrives in tolerably good ground ; secondly, it yields seed 

 abundantly ; thirdly, its seed-pods are slow in opening, so 

 that the seeds which ripen first are not lost, while the rest 

 are ripening ; this species is cultivated in some parts of Hun- 

 gary, and I mention it here to attract the attention of bota- 

 nists and cultivators to it, as a novelty. 



* Waldstein et Kitaibel Plant, rar. Hung. Vol. i. page 26, tab 28. 



