NEW PLANTS. 
113 
found it in great abundance on the rocky banks of the river 
Michatayal. The temperature generally of the above habitats 
is 68 to 70°, and from being exposed, cold at night.— Bot. Reg. 
Rhododendron Rolltssonii. — Garden variety. 
In many respects, this very striking plant so much resembles 
Rhododendron nobile, the Ceylon variety of R. arboreum, espe¬ 
cially in its deep-red flowers and the closeness with which they 
are arranged, that we supposed it must be it. But upon com¬ 
paring it with wild specimens from Ceylon, we find that the 
Rhododendron of that island has leaves silvery underneath, 
while in this plant they are rusty. It is therefore clear that 
R. Rollissonii has had some other origin, but what that origin 
was we do not know. It is among the handsomest of the crowd 
of varieties called hybrids. 
This variety is rather more tender, and requires a warmer 
situation than the old R. arboreum. It grows freely in a mix¬ 
ture of sandy peat and loam; the plants after flowering should be 
kept in a warm pit and rather close, to encourage the growth of 
the young shoots; afterwards they may be placed out of doors 
during the summer, and the pots should have a top dressing of 
cow-dung and plenty of water.— Bot. Reg. 
Pentandrta Monogynia— BorUginacece. 
Echium Petrceum. This is a beautiful herbaceous plant, a 
native of rocks in Dalmatia, where we believe it was first dis¬ 
covered by General Baron V. Welden ; it flowered beautifully 
in a cool greenhouse in the gardens of the Horticultural Society 
in May; at that time it was the gayest little plant possible, 
with its neat clean leaves, stiff stems, about nine inches high, 
and pale blue flowers, which are pink before they open. It 
succeeds best in a mixture of sandy loam and rough peat that 
is rather poor; it must be kept in a dry airy situation, where 
there is plenty of light, at all times, but particularly during 
winter.— Bot. Reg. 
Didynamia Angiospermia. — Gesneriacece. 
Achimenes Grandiflora . A figure of this fine plant is given 
in Curtis’s Botanical Magazine, from a drawing prepared and 
sent by M. Van Houtte of Ghent. It would seem to vie with 
A. longiflora in the size and beauty of its flowers. Their colour 
is much more verging to red, and the leaves are rusty coloured 
below. It was discovered by Schiede and Deppe in Mexico, 
growing in shady places, near the Hacienda de la Laguna in 
Barranza de Toselos .—Bot. Mag. 
Gynandria Monandria — OrchidecE. 
Dendrobium Crumenatum. A native of various isles in the 
Malay Archipelago, recommending itself for cultivation by the 
