AND THEIR MANAGEMENT. 



Potting Seedlings. 



will be advancing during the whole period in which the 

 plant should have been at rest. The result of this 

 will be (especiall)' if premature growth commences in 

 autumn) that neither of the pseudo-bulbs will be properly 

 ripened, they will be prone to deca}- during the dull 

 winter months, and the future well-being of the plants 

 -will be ver\' doubtful and uncertain. It is better to 

 remove the plants to cooler and more air)- conditions when 

 growth is completed, so that the)- ma)- have the full 

 advantage of the resting season, returning them to their 

 growing quarters as soon as there are traces of renewed 

 vitalit)- in the earl\- spring of the )-ear. Insects and other 

 pests will have to be held in check b)- the methods 

 advocated under that heading, p. lo. 



On the Laws of Plant Inheritance. 



A considerable amount of prominence has been given 

 to this subject in the Jouryial of the Royal Horticultural 

 Society, the Orchid Review, and other horticultural and 

 scientific publications, and as these have been particularly 

 directed to Orchid hybrids we feel that the matter is of so 

 much interest, that it should not be overlooked in this 

 work. The discussion has arisen from what is termed 

 " Mendel's Law," which, simply stated, is as follows : If 

 two distinct but corresponding characters [A and a) be 

 united b)' crossing, and the resulting crosses be self- 

 fertilised, the progenv- as regards this pair of characters 

 will separate themselves according to the formula 

 A + 2Aa + a, showing, on the average, that out of every 

 four plants raised, one will take after the original character A. 

 two will be intermediate Aa, and one w-ill take after the 

 original character a. In other words, one half will be 

 intermediate, and the other half retain the original 

 characters. This law- of Mendel's was applied to Peas, 

 but it has since been apparently confirmed by other inde- 

 pendent observers in the case of numerous other genera. 



In the issue of the Journal of the Royal Horticultural 

 Society for April, 1902, Capt. C. C. Hurst has an ad- 

 mirable paper on " Mendel's Law Applied to Orchids," 

 in which an extensive analyses of numerous hybrids^ of 

 the Orchid family are admirably expounded. Notwith- 



