68 



given up in some places owing to its failure to pay, due partly to 

 the injury caused by wind and by careless tapping, and also to the 

 hardness of its bark. 



The advantage of the three species from Bahia and Piauhy is 

 that they are less liable to the injuries just mentioned and that, 

 speaking generally, the yield of rubber is far higher than in 

 If. Glaziovii. One hectare planted with M. Glaziovii is estimated 

 to yield 300 kilos, whilst 1000 kilos per hectare is the amount 

 reckoned for M. piauhyensis or At. heptaphylla when planted 

 in suitable positions. Such a yield exceeds even that of 



brasiliensis. 



He vea 



M. piauhuensis and M, 



the former yields a slightly more valuable rubber, and the tree is 

 ready for tapping somewhat earlier. On the other hand, the 

 latter appears to be a longer-lived tree. 



He 



mere is no doubt that the rubber of H. brasUiensis is of better 

 quality, possesses greater elasticity and obtains the higher price, 

 out m spite of this the characteristics of these Manihots make 



them well worthy of cultivation. 

 Conclusions. 



lurT','. T, , concl usions drawn by Ule, from the 

 SL^S ** that ^erever conditions are suitable the culti- 



MWnW^" Gl % 10 ™ W J, U have to be «»Plw»cl by that of the 



sneSirtn IT B * ahl % ? he ^ iestion as £ which of the three 

 TT!r!*_ t0 be P refe **red depends chiefly on the nature of the soil, 



species IhLtu ^ J T 1 } M ' *Motoma is the most suitable 

 Ranted m a Lm ^WU* and M. piauhyensis should be 



nZ tL 1 ^?! 1 ^ sand 7 soil. M. dichotoma ha* th« atlvanfaure 



easily. 

 Eev 



germinate 



yens 



M. heptanhuUa and M. 



and less fertile districts. 



Ule 



reader. miS artlcle w added for the convenience of the 



XI 



WW ORCHIDS : DECADE 31. 



301. Liparis tabularis p i* 



SSri lab6ll ° 0Thi «^ ofef" *+*< a L. macrantka, 

 ert ' et veni * regulariter flabellatis 



ut u ie' 8 f u n paroer ,-„ ,, " — 





