which only, water should be given once a fortnight in 

 winter, and once or twice a week in summer, as occasion 

 requires. They may be increased by seeds, or by decapi- 

 tation in summer, in the usual way, taking special care to 

 dry their wounds properly in some shaded place before 

 planting, and lightly watering them to settle the earth at 

 the time. 



" M. puldira is a simple, oblong, cylindrical, green plant, 

 with a depressed woolly apex, and almost covered with 

 unequal spines, beautifully and intricately arranged in 

 11-13 symmetrical, very spiral rows. The mammilkc are 

 rather large, and ovately pyramidal. T\\e flowers are pro- 

 duced, near the summit of the plant, from the woolly 

 axillae of the mammilla', solitarily, but nearly in a row, are 

 rather large in this genus, and of a rosy colour, opening 

 with us in the month of June. 



" It may be added, that about six of the superior spines 

 are fulvous, and on the apex of each mammilla, and many 

 times larger, though less expanded, than the basal niveous 

 ones, which are about fourteen in number, and like very 

 small setae, elegantly radiating in a nearly horizontal way, 

 or slightly recurving. 



" This plant will arrange next M. fulvispina, to which 

 it is doubtless very closely allied, but appears both in 

 character and country distinct." — Haiv. 



We are greatly indebted to Mr. Haworth for the deter- 

 mination of this species, which belongs to a tribe so numerous 

 and little known, that it would have been scarcely possible 

 for a Botanist less skilful in the knowledge of succulent 

 plants, to have discovered whether it had been previously 

 described or not. 



Mr. Haworth employs the term spinarimn in his specific 

 character, for the corneous place out of which the spines of 

 Cacti proceed, and into which he finds them fitted, as the 

 teeth of animals are into the socket of the jawbone of 

 animals. A very curious structure. 



J. L. 



