112 THE ORCHID REVIEW. [APRIL, 1908, 
We have kept pollen in blue paper in gelatine capsules for 34 months, — 
and then got a pod of seeds and raised seedlings from it, and if we can keep _ 
it for weeks on the dry flowers first, and then pack it away, it will consider- — 
ably prolong the period of storage, and help in obtaining hybrids one might 
not be able to get otherwise. Referring to the letter of Dr. Otto N. Witt 
at page 35, I wish to say that we do not find any difference in the seedlings _ 
raised from stored pollen. The Lelia purpurata x Cattleya Percivaliana — 
seedlings, mentioned in my note’ of October, 1903 (O.R. xi. p. 292), where 
the C. Percivaliana pollen was eleven weeks old before being used, are very 
strong healthy plants, and so with others. I quite agree with Argus that if 
the pollen, after storage, is able to retain sufficient vitality to produce 
pollen tubes and fertilise the ovules, there is no need for the resultant seed- 
lings to be weak or unhealthy. EmILy THWAITES. 
Streatham. 
| CYNORCHIS. 
Ir is well-known that several species of Cynorchis are very successfully 
cultivated at Kew, where also the pretty little C. x kewensis was raised 
from C Lowiana ? and C. purpurascens ¢. A good example of C 
Lowiana was figured at page 121 of our last volume, and C. purpurascens at 
page 305 of the previous one. A good specimen of C. Lowiana has just 
been figured in the Gardener’s Chronicle (1908, i. p. 184, suppl. fig.), where 
the following note on their culture appears :—‘ At Kew the plants are 
rested from the end of December until the beginning of May, when they ate — 
turned out of their pots, the old compost carefully removed from the fleshy: 
roots, and repotted in a mixture of equal proportions of peat, chopped 
sphagnum-moss, and Orchid leaf-soil, with the addition of a little sand 
and charcoal. They are then placed in a moist atmosphere, having @ 
temperature of 60° to 65° Fahr. by day and 55° at night. They are watered 
with rain water exclusively, and they produce bright green leaves and an 
abundance of flowers.” 
DENDROBIUM x DELICATUM. 
THE origin of Dendrobium delicatum, Bailey, whose history was given at 
page 88, can now be cleared up. Sir Trevor Lawrence has sent to Kew 49 
inflorescence of the hybrid raised by the late Mr. Spyers from D. speciosum 
¢ and D. Kingianum ¢, and which flowered for the first time some sixteem 
years ago (G.C. 1892, i. p. 409), and it agrees so well with the wild plant 
that no further description is necessary. D. delicatum must therefore be 
deleted from the list of “species.” It is interesting to have the mattef 
cleared up, and there is a moral here which systematists should take © 
ut R.A.Re 
