054 THE ORCHID REVIEW. [May, 1915 
$) 
‘NDER the above heading are included such well-known forms as 
Dendrobium chrysotoxum, densiflorum, Farmeri, thysiflorum, and a 
few others. These Orchids are among the most beautiful and _ striking 
subjects for a Warm house, and under good culture flower profusely, as 
many racemes are borne for several successive seasons on the back bulbs as 
well as on the new Jeads. Their culture is very simple, but several points 
must be carefully noted. 
eee RACEMOSE DENCROBIUMS. 
With respect to temperatures, I find the following give good results: 
During the growing season keep the house as hot as possible, and during 
the resting season from 55° to 65° Fahr. In regard to water, it is 
detrimental to give too much; let the compost become dry between each 
watering, but free syringing over the leaves during the period of growth is 
needed. Further, when growth is completed, do not rest the plants as cooh 
or as dry as usually prescribed for such Dendrobiums as nobile and 
Wardianum, but merely remove the plants to the Cattleya house and give 
water about once weekly. Root disturbance is very harmful, as well as @ 
mass of soil about the roots. Keep them in as small receptacles as possible, 
and only repot about every three years, using a mixture of osmunda fibre 
and moss, and pot very firmly. 
I strongly advocate growing these species throughout the year without 
any shading whatever. This rather surprising mode of culture is of great 
importance in getting the old bulbs to flower year after year. A proof of 
this can be illustrated. Ihave many plants of D. chrysotoxum now in bud, 
in 12-inch pans, bearing 21, 17, 15, 12, and 11 racemes respectively, In 
one case a very old back bulb, after producing two flower spikes last year, 
is now bearing three, whilst the young growths for next year will become 
well matured under the blaze of an August sun. Dendrobium thyrsiflorum 
also has frequently borne two and three spikes on back bulbs. 
Finally, to get the best results, grow the plants as near the roof glass 4° 
possible, and in the summer months, to avoid scorching of the leaves, 
syringe the plants about eight a.m, and again about six in the evening, 
when the sun’s rays will have lost their full force. 
Redbourn, Herts. C. ALWYN HARRISON. 
A FossiIL Orcuip.—Under the title ‘‘ Notes on Orchids,’ and the name 
** Antholithes pediloides, n. sp. (fossil),”” Mr. T. D. A. Cockerell describes 
(Coult. Bot. Gaz., lix. p. 333, fig. 1) a fossil that was collected by Mr. Geo- 
N. Rohwer in the Miocene shales of Florissart, Colorado. The description 
