110 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
parentage, raised by M. Jules Hye-Leysen, of Ghent, the parental variety 
used being P. insigne Wallacei. Jn form, P. Spieerianum is prepctent 
in the habit of growth ; in all, favouring that parent as 24 : 23. In colour, 
P. Spicerianum predominates in the leaves, while P. insigne preponde- 
rates in the lower sepal and lip ; altogether favouring P. insigne as 17 : 16. 
The whole plant, in form and colour, being fairly intermediate, as 40 : 40, 
or 50 per cent. of each parent. 
(4) (a) P. x nitens I.—A hybrid out of P. villosum (Pfitz) by P. insigne 
(Pfitz), var. Maulei, raised by Messrs. Veitch. Jn form, the parent P. 
insigne is prepotent in the ovary and lip; in all, favouring that parent as 
23:19. In colowr, P. insigne predominates in the upper sepal, lower 
sepal, and staminode, while P. villosum preponderates in the leaves ; alto- 
gether favouring P. insigne as 18:14. The whole plant, in form and colour, 
favouring P. insigne as 42 : 32, or 56°7 per cent. (Fig. 31.) 
(4) (0) PB. x nitens IJ.—A second variety of the same parentage, received 
by me from Mr. Winn, of Birmingham. Jn form, P. insigne is pre- 
potent in the ovary and lip; in all, favouring that parent as 23:19. In 
colour, P. insigne predominates in the upper sepal, lower sepal, and 
staminode ; altogether favouring that parent as18:12. The whole plant, 
in form and colour, favouring P. insigne as 41 : 31, or 56°9 per cent. 
(4) (c) P. x nitens III.—A third variety of the same parentage, received 
by me from Mr. Reginald Young, of Liverpool, and known as var. gigan- 
tewum. In form, P. imsigne is prepotent in the ovary and upper sepal, 
while P. villosum predominates in the habit of growth and leaves; in all, 
favouring P. villosum as 20:19. Jn colour, P. insigne predominates in 
the upper sepal and lower sepal, while P. villosum prevails in the ovary ; 
altogether favouring P. insigne as 16: 12. The whole plant, in form and 
colour, favouring P. insigne as 35 : 32, or 522 per cent. 
(4) (d) P. x nitens IV.—A fourth variety of the same parentage, raised 
by Messrs. Veitch, and known generally as var. superbum. In form, P. 
insigne is prepotent in habit of growth, ovary, and upper sepal; in all, 
favouring that parent as 25:18. Jn colowr, P. insigne predominates in 
the leaves, upper sepal, and staminode; altogether favouring that parent 
as 19:13. The whole plant, in form and colour, favouring P. insigne as 
44 : 31, or 58°6 per cent. 
(4) (e) BP. x mittens Sallierti, really the typical hybrid from 
typical forms of both parents, and received by me from Mr. Reginald 
Young, of Liverpool. Jn form, P. villosum is prepotent in the petals ; 
in all, favouring that parent as 22: 20. In colowr, P. insigne predomi- 
nates in the leaves, upper sepal, and lower sepal, while P. villosum pre- 
ponderates in the petals; altogether favouring P. insigne as 19: 15. The 
whole plant, in form and colour, favouring P. insigne as 39 : 37, or 51:3 
per cent. 
These hybrids, as a whole, are fairly intermediate between their two 
parents, yet there is in most cases a local predominance of one parent or 
the other in one part or another of the hybrid. This applies equally 
either to form or colour. 
When several hybrids from the same pair of species are compared 
together, this variation of the parts, or “ Partial Prepotency,” as I propose 
to call it, becomes even more apparent and more diverse. For example, in 
