224 HOT-HOUSE OF REPOTTING, &c. [MAY. 



Zebra plant. It has light blue flowers in ovate spikes, 

 about the size of large pine cones. It is a herbaceous 

 plant ; but in the warmest part of the Hot-house re- 

 tains its splendid foliage ; requires a very liberal supply 

 of water, and ought to be in every collection. 



Cdnnas, about thirty species, several of them deserv- 

 ing cultivation both for flower and foliage ; they are 

 principally natives of the West Indies, and might all be 

 easily obtained. The finest are C. gigdntca, has large 

 leaves and orange flowers; C. limbata, flowers scarlet and 

 yellow ; C. discolor, has large cordate, accuminate leaves 

 of a crimson colour, the flowers are scarlet ; C. iridiflora, 

 has large crimson nodding flowers, very different from 

 any of the others, and the finest of the genus. They 

 all, while in a growing state, require a liberal supply of 

 water ; and being herbaceous plants watering ought to 

 be given up about the first of November, and renewed 

 about the first of January, thus giving them a cessation 

 which they require to flower freely ; but when water is 

 constantly given, which is the general plan in our col- 

 lections, they continue to push weak shoots and few 

 flowers. 



Cactus. This extensive genus is curious, grotesque, 

 interesting, and varied in character and habit ; is now 

 divided into six distinct genera according to their na- 

 tural appearance and habit. We will describe a few 

 of each genus, none of which going under the name of 

 Cactus, we will give them the six following. 



Mamilldrias, above twenty species, and are those 

 which are covered with roundish bearded tubercles, 

 and with small red and white flowers. M. coccinea ; M. 



