JUNE, 1915.] THE ORCHID REVIEW. 173 
the house. During the growing season, whenever the weather is bright 
and warm, these Cypripediums delight in having their foliage gently 
sprayed over with clear, tepid soft water, but care should be taken with 
regard to such species as C. Stonei, Rothschildianum, Parishii, przestans, 
and others of that section, that no water lodges or remains low down in 
the centre of the growths or axils of the leaves, as they are very liable to: 
decay from this cause. 
TuuntAs.—Of plants now in bloom may be mentioned the Thunias,. 
which are very attractive, the fresh green foliage setting off the fine arching: 
flower spikes to excellent advantage. The following species and hybrids: 
are well worth adding to any collection, and are always valuable for 
exhibition purposes: T. Marshallii, T. Bensonie, T. candidissima (pure 
white), T. Veitchii, and T. Brymeriana. As these plants pass out of flower 
they should be removed to a cool, airy house, where they may receive 
uninterrupted sunlight. They will finish up and consolidate their growths- 
in an early Vinery or Peach house; where the fruit is colouring, provided 
the foliage overhead is not too dense. The plants should still be well 
watered each time the soil becomes dry, and so long as the leaves remain 
green, but when they commence to change colour the supply should be 
gradually withheld. Any plants that have missed flowering, and their 
stems are growing to an unreasonable length, should have the points of the 
shoots pulled out, and the plants subjected to the same treatment as those 
that have bloomed. 
Thunias may be readily propagated during this month by taking off the 
old back stems nearly down to their base, cutting them off at the joints into’ 
lengths of about four to six inches, and inserting them firmly as cuttings- 
into small, well-drained pots, using a mixture of chopped sphagnum and 
coarse silver sand. When the new shoots begin to push out grow them 
along as quickly as possible in strong heat.. When subjected to a very dry 
atmosphere during their resting season the leaves of Thunias frequently 
become infested with red spider, but it is easily kept in check by occasion- 
ally laying the plants down on their sides, and syringing them with a hot 
solution of soft soap and water, adding a little of the XL All insecticide, 
and allowing it to dry on. Afterwards give them a good hard syringing: 
with clean rain water. 
DENDROBIUMS.—Many of the divided pieces of Dendrobiums that were 
potted in the spring into small pots have their growths now well advanced, 
and these from their base are making large numbers of new roots. If any of 
these plants have filled their pots with roots, now is a good time to repot 
them. Do not disturb the roots or compost more than is unavoidable, but 
carefully turn them out of their pots, place them into larger ones, and fill 
the space around the ball with chopped osmunda fibre. After repotting, 
