156 THE FLORIST AND 



and fully exposed to the dews of the night, which are very genial to them. 

 In about three or four weeks they will be rooted, and may either remain 

 where planted till autumn, or be at once transplanted into pots, and placed 

 in the shade till they have taken fresh root. These cuttings will make fine 

 plants for the next season, and by extra culture may be made fine plants for 

 blooming in the green house during the winter. Cuttings taken off in Sep- 

 tember, and planted in a very shady situation, will be well rooted in the fol- 

 lowing spring, and may then be transplanted into any part of the garden. 

 The latter period will be the best for all the Southern States, and the former 

 for the Eastern States. Indeed, cuttings can be taken off, and may be pro- 

 pagated successfully, at any period of the season, when the plant has just 

 ceased to bloom, which is the grand criterion for propagating the rose. In 

 some soils, of a close sandy nature, all that is required is merely to put in a 

 small piece of a shoot, in moist, cloudy weather, where it is shaded from the 

 direct rays of the sun, and it will root in a few weeks without any other care. 

 Where there is the convenience of a forcing house, or hot bed of manure, 

 there is another period of the season when the rose may be extensively pro- 

 pagated, which is practised to a very great extent by nurserymen who com- 

 mence forcing roses in February. As soon as they show bloom, the shoots 

 are cut into cuttings of two eyes each,_and planted into very small pots, of 

 very sandy soil ; these are placed into a close, warm hot-house or hot-bed, 

 in a moist temperature of 70° to 80°, where they will root in from two to 

 three weeks, and are frequently sold within six weeks from the time they 

 were planted. 



The above is taken from "Buist on the Rose," the fourth edition of which 

 has just been published. To the amateur or other person, who needs a de- 

 scription of the best varieties, and instructions in growing and propagating 

 the different kinds, this book is indispensable. 



FURTHER NOTES ON CEREUS GIGANTEUS OF SOUTHEAST- 

 ERN CALIFORNIA, WITH A SHORT ACCOUNT OF ANOTHER 

 ALLIED SPECIES IN SONORA. 



BY DR. GEORGE ENGELMANN, ST. LOUIS, MO. 



Specimens of flowers and fruit, together with interesting notes and 

 drawings communicated by Mr. George Thurber, and specimens of ribs of 

 the plant with spines presented by Dr. Parry, enable me to perfect the 

 history -of this giant Cactus. Mr. Thurber traveled through the Gila 

 country and Sonora, as one of Mr. Commissioner Bartlett's party, in the 

 summer of 1851, and is believed to be the only scientific gentleman who 

 has seen the plant in question in flower. These materials enable me to 

 furnish the following detailed character : 



