142 THE ORCHID REVIEW. [May, 1908. 
fertilising a flower with mixed pollen from Lelia flava and Cattleya Men- 
delii. One appeared to be a true hybrid between L.-c. Cappei and C, 
Mendelii, whose characters were well blended, but the other closely 
resembled Lelia Cowanii, a supposed natural hybrid between Leelia flava 
and L. cinnabarina, in size and colour. It was suggested as a case of dis- 
sociation of the mixed character, whereby an ovule of L.-c. Cappei, from 
which the character of C. Warscewiczii had been eliminated, had been 
fertilised by a pollen tube from Leelia flava. 
INHERITANCE OF ALBINISM IN OrcHIDS.—Mr. C. C. Hurst, F.L.S., 
wrote :—‘‘ Since my last communication I have had an opportunity of 
examining some plants of Paphiopedilum insigne Sanderz. Much to my 
surprise I found distinct traces of purple sap in the basal margins of both 
the old and young leaves. The plants were not in flower, but I am told on 
good authority that some minute spots are also to be found on the dorsal 
sepal. In view of this, it would appear that P. insigne Sander, so long 
considered an albino, is in reality a coloured form in which the purple sap 
is present in minute quantities. In accordance with the provisional scheme 
suggested in my last note, P. insigne Sanderz wil! therefore be carrying 
both the colour factors C. and P., and when mated with albinos may be 
expected to give coloured hybrids, as it has done in the case quoted by Mr- 
Rolfe. The result is that all the combinations with P. insigne Sandere 
given in Tables A and B (see p. 103 of our last issue) must be cancelled. 
It would be interesting to know if the two other yellow forms, P. insigne 
Sanderianum and P. i. Macfarlanei, recorded as unspotted, are true albinos, 
and what they produce when crossed.” 
Mr. Rolfe’s theory that the colour reversions are due to the fact that the 
albinos crossed belong to diverse species, fails to account for the cases in 
sweet peas, stocks, and other plants where two albino individuals of the 
same species, variety, and race, may revert to coloured forms when crossed. 
On the other hand, the conception of complementary colour factors 
satisfactorily explains all the known phenomena of colour reversions in 
plants and animals, so far as they have been critically and experimentally 
studied. 
MANCHESTER AND NortTH oF ENGLAND OrcHID SOcIETY. 
On April 1st and 2nd the above Society tried a new venture by taking 
the large St. James’ Hall, Manchester, for the purpose of a Spring 
Exhibition, and the success of the Show was largely due to the Trade 
members, who stepped grandly into the breach and gave of their best. 
Messrs. Armstrong & Brown, Tunbridge Wells, Kent, put up a magnifi- 
cent group, chiefly Dendrobiums, on a stage space about 60 feet by 9 feet: 
At each end were grouped about 100 plants of well flowered Dendrobium 
