DESCRIPTIVE LIST OF NEW PLANTS. 
159 
ing atmosphere, perfectly sweet, of 75° or 80° is kept up during 
the night, and partial shade must be given in bright sunlight. 
When roots have been plentifully produced, give it a final shift, 
using a rough material as before described ; a few round stakes 
will answer for its support, and to which the shoots must be tied 
as they grow; by autumn it will have done its work, and may 
then be brought into flower at any time from February to May, 
by placing it in a higher temperature as may be required. — Bot . 
Reg. 31-47. 
Amaryllidace.®. —Ilexandria Monogynia. 
Collania dulcis (Herbert). For the opportunity of figuring 
this rare plant we are indebted to our kind correspondent, the 
Dean of Manchester, with whom it flowered in August, 1846. 
The stalks of this plant are about a foot high, erect, with a 
little tortuosity, but not prehensile; the leaves are narrow and 
glaucous; the flowers are produced from one to four on the apex 
of the stem, and have a pendent position; they are cylindrical, 
the calyx reddish purple, and the corolla bright green. The 
plant is a native of the Andes of Bolivia, where, it is stated, the 
children gather its capsules to eat on account of their sweet 
pulp, and hence the name dulcis. — Bot. Reg. 34-47. 
Ericaceae. —Decandria Monogynia. 
Rhododendron arboreum Raxtoni (Gibson). This very magnifi¬ 
cent variety of R. arboreum is a native of the East Indies, where 
it was discovered in 1837, by Mr. John Gibson, his Grace the 
Duke of Devonshire’s collector. It grew in elevated situations 
on the Khoseea Hills, forming a spreading tree of considerable 
beauty. It produced its splendid flowers for the first time in the 
greenhouse at Chatsworth, in the spring of 1844, being then a 
very small plant. This spring it has again flowered. Its leaves 
are three to four inches long, tomentose, somewhat obtuse, dull 
green above, ferruginous beneath. The flowers are not seated 
immediately above a whorl of large leaves as are those of R. 
arboreum, the corolla is dark crimson, very fleshy, campanulate, 
three inches long, and the same in diameter when expanded, and 
the throat very indistinctly spotted. The plant requires exactly 
the treatment of R. arboreum. — Rax. Mag. Bot. 
