IIII-: ORCHID WORI.!). 
6 1 
Further intercstiu*^- results will be ubtiimed 
by mating' the four eoluured forms with the 
five albino forms. 
Of the 20 possible matinys 7 will give all 
coloured forms ; 8 will give on the average 
equal numbers of coloured and albino forms ; 
2 will give 3 coloured forms to 5 albinos ; 2 
w ill give 3 coloured forms to i albino ; 
and I will give I coloured form to 3 albinos. 
Table III. gives the factorial details of 
these matings, showing how the above 
calculations have been made. 
Table III. (Coloured x Albinos.) 
Parents. 
(a) CCRR X (1) CCrr 
(a) CCRR X (2) Ccrr 
(a) CCRR X (3) ccRR 
(a) CCRR X (4)(^-cRr 
(a) CCRR X (5) ccrr 
(b) CCRr X (I) CCrr 
(1)) CCRr X (2) Ccrr 
(1)) CCRr X (3) ccRR 
(h) CCRr X (4) ccRr 
(b) CCRr X (5) ccrr 
(c) CcRR X (i) CCrr 
(c) CcRR X (2) Ccrr 
(c) CcRR X (3) ccRR 
(c) CcRR X (4) ccRr 
(c) CcRR X (5) ccrr 
(d) CcRr X (I) CCrr 
(d) CcRr X (2) Ccrr 
(d) CcRr X (3)ccRR 
(d) CcRr X (4) ccRr 
(d) CcRr X (5) ccrr 
Ofispring. 
all CCRr 
I CCRr : I Ccl^- 
all CcRR 
I CcRR: > CcRr 
all CcRr 
I CCRr 
I CCrr 
( I CCRr : 
I CCrr : 
( I CcRr : 
I Ccrr 
I CcRR 
I CcRr 
f 1 CcRR 
2 CcRr 
\ I Ccrr 
I CcRr : 
I Ccrr 
I CCRr 
I CcRr 
( I CCRr 
2 CcRr 
1 1 ccRr 
I CcRR 
I ccRR 
1 I CcRR- 
I CcRr 
\ I ccRR : 
I ccRr 
I CcRr : 
I ccRr 
1 I CCRr : 
I CCrr 
( I CcRr: 
I Ccrr 
( I CCRr: 
I CCrr 
2 CcRr : 
2 Ccrr 
' I ccRr : 
I ccrr 
( I CcRR 
1 CcRr 
1 I ccRR : 
I ccRr 
( I CcRR • 
I ccRR 
2 CcRr: 
2 ccRr 
( I Ccrr : 
I ccrr 
I 1 CcRr: 
I Ccrr 
\ I ccRr : 
I ccrr 
Result. 
11 Colmired 
ill Coloured 
dl Coloured 
ill Coloured 
ill Coloured 
I Coloured : 
I Albino 
( 2 Coloured : 
I 2 Albinos 
all Coloured 
( 3 Coloured : 
( I Albino 
' I Coloured : 
' I Albino 
all Coloured 
( 3 Coloured : 
I I Albino 
I I Coloured : 
I I Albino 
( 2 Coloured : 
I 2 Albinos 
( I Coloured : 
I I Albino 
( 2 Coloured : 
i 2 Albinos 
\ 3 Coloured : 
j 5 Albinos 
I 2 Coloured : 
I 2 Albinos 
) 3 Coloured : 
j 5 Albinos 
( I Coloured 
I 3 Albinos 
Identification of Individual Stud 
Plants 
The practical consequences of these first 
principles are important and far reaching 
from the Orchid breeder's point of view. 
If each individual plant grown from a seed 
has a definite germinal constitution which 
determines its breeding powers and poten- 
tialities, then it is necessary that each 
individual plant used as a parent should h;ive 
an itientilication mark. Whether this identi- 
fication mark consists of an individual name, 
a stud number, or anything else, is simply a 
matter of convenience, so long as the identity 
of each stud individual is maintained for 
future use. In iQog the writer suggested that 
identification might be assured Ijy putting" the 
name of the importer or raiser in brackets 
after the ordinary name together w-ith a num- 
ber showing the order of its appearance, e.g., 
Cypripedium callosum Sanderae (Sander i), 
(Low i), (Cookson i), (Statter i), and so 
forth. The first was imported in 1894, the 
second in 1904, and the third and fourth 
were raised by hand, presumably from the 
first. All divisions of the original plant 
would, of course, have the same germinal con- 
stitution, and would consequently bear the 
same identification mark. 
There is no doubt that in course of time 
certain individual plants would acquire a stud 
reputation much in the same way as a noted 
sire or brood mare does in thoroughbred 
horses, and the propagation of such an indi- 
vidual Orchid by division, and its distribu- 
tion, would become a valuable economic 
asset. 
Having secured the identification of each 
individual stud plant, the next step is to 
ascertain their germinal constitution by 
breeding from them. The original Mendelian 
method was to self them, but recent results 
show that this method alone is not sufficient 
to give a complete analysis of the germinal 
constitution of a plant. In order to do tliis 
it is necessary to cross-breed them, and in 
cases like albinism, for instance, this is the 
only method possible. From this it is evident 
that the ordinary e:<periments m hybridisa- 
tion and cross-breeding made by Orchid 
breeders are precisely what we require in 
order to ascertain the germinal constitution 
of individual plants, provided that each indi- 
vidual plant used as a parent is carefulh- 
identified for future reference and use. 
Self Sterility in Orchids. 
The question of selfing Orchids leads us to 
