264 THE ORCHID REVIEW. [SEPTEMBER, IQI0.- 
whether C or R (i.c., when it is derived from both parents), and impurity 
to the single presence (¢.¢., when derived from one parent only). For 
example, Cattleya Mossie Wageneri and C. Gaskelliana alba are regarded 
as R albinos, carrying a double presence of the R factor, but C. Schroeder 
alba and C. Warneri alba as C albinos, the former being pure, owing to the 
double presence of C, the latter impure, owing to its single presence only. 
We do not quite see how the latter result was arrived at, because ‘‘ C. 
Gaskelliana alba x C. Warneri alba, raised by M. Peeters in 1904, produced 
the hybrid C. x Peetersiz Myra, five of which were true albinos with pure 
white flowers and green leaves, and two were coloured, having lilac-purple 
flowers with purple margins to the leaves.” In other words, both C and R 
were present, yet the sap was uncoloured in five of the seven seedlings. By 
the way, Paphiopedilum Lawrenceanum Hyeanum is described as ‘“ 
R albino,” yet when selfed by Mr. N. Cookson one plant is said to have 
reverted to an ordinary coloured form of P. Lawrenceanum. 
Such knowledge is described as most useful to the Orchid breeder who 
wishes to raise new and improved forms of valuable albinos by crossing, 
hence for stud purposes the importance of some simple method of identifi- 
cation of individual albinosis urged. ‘‘ Standard stud individuals of known 
germinal constitution would then have a definite value, and their propaga- 
a pure 
tion and distribution would then be more profitable to all concerned.” 
PAPHIOPEDILUM GLAUCOPHYLLUM HYBRIDS. 
I HAVE read with interest your notes about the Paphiopedilum glauco- 
phyllum hybrids sent by Dr. Hans Goldschmidt (p. 250). The late Mrs. Ida 
Brandt bought P. glaucophyllum in 1904, soon after its introduction, and I 
used the first expanded flowers for crossing. I am still in possession of my 
Record Books, and find that the hybrids sold to Dr. H. Goldschmidt are, 
No. 99, Paphiopedilum Mastersianum x glaucophyllum, fertilised 3-iv.-1g905, 
sown I0-xi.-1905, germinated May, 1906, and No. tor, P. Curtisii crossed 
with mixed pollen of P. niveum and glaucophyllum (one anther of each 
being used), fertilised 5-vi.-1905, germinated end of May, 1906. Of these 
two crosses I got about 300 seedlings, which I sold to five or six different 
people, private and trade. M. Verdonck has received 140 of No. 99, and 
15¢ of No. ror. Some of the smallest seedlings are still under my care, 
and have not yet flowered. As the seedlings are likely to find their way 
into many different collections I wish Dr. Goldschmidt would name those 
that have flowered with him in order to avoid duplicate naming in different 
collections. E. MIETHE. 
‘Perhaps Dr. Goldschmidt can give the numbers attached to the 
seedlings which flowered. The above note explains the phrase 
“‘glaucophyllum niveum,” which we did not understand.—Eb.] 
