CH^iNESTES LANCEOLATA. 83 



applied two or three times, at intervals of a day. Dry weather should be selected 

 for the operation ; if the pollen is wetted, it loses its fertilising properties, (see page 

 107, Vol. I.) We have named these three species as suitable subjects for the 

 experiment, but any two of similar habit might be tried. 



It is not, we believe, generally known that a white species has been recently 

 added to this genus, though at present it appears to be confined to the Belgian 

 gardens, where it was originally introduced from Chili. It is tuberous-rooted, with 

 five-lobed leaves, and large flowers of a pure white, the claw of the petals being of 

 a bright yellow colour ; this plant is the T. alhiflorum of Van Houtte. "We may 

 add here, that the plant known in England as T. azureum has been removed to a 

 new genus by Professor Morren of Liege, by whom it is termed Rexia coerulea ; but 

 we are unaware of the grounds upon which this separation has been made ; the only 

 important differences between this plant and its congeners consisting in its blue 

 colour, and nearly regular petals. 



The Tropceolum tuberosum is an interesting species, which would deserve to be 

 more generally grown were its flowers produced in greater abundance. It succeeds 

 best in a good friable loam, of rather close texture ; in loose rich soils it grows 

 vigorously, but is less prolific of flowers. We have seen a very pretty effect 

 produced by training this plant over a bed, upon a stout wire, a root being planted 

 on each side of the bed. Its tubers are nearly hardy, in mild winters and well- 

 drained soils ; but a few should be dug up and preserved in a dry state, as a 

 precaution against loss. 



We shall have some other interesting species of this genus to notice before long ; 

 and with regard to the T. Smithii, we have only to remark, that it is named by De 

 Candolle in compliment to Sir James Smith, formerly President of the Linnaean 

 Society, and author of 'English Botany,' and many other botanical publications. 



For a notice and figure of the charming T. speciosum, a plant which cannot be too 

 highly praised, see Vol. I. 



CH^ENESTES LANCEOLATA. 



Lance-leaved Chanestes. 

 Linnean Class — Pentandria. Order — Monogynia. Natural Order — Solanacejb. 



The proximity of the South American province of New Granada to the Equator 

 would, at first sight, render it highly improbable that any plants from so torrid a 

 latitude would be suited for notice in a periodical devoted to hardy and half-hardy 



