The London Florist gives the following description of these new Rhododendrons, from Mr. E.G. HEndERson:

Rhododendron Nuitalll

This, the largest flowered Rhododendron kncwn, has foliage handsomer than described in books on living plants now in this country; the flowers resembling those of the lily, are much larger than the Sikkim Rhododendron Dalhwtuice. Color, white, with tint of rose-red, and yellow at the base within, and delightfully fragrant. It has been named in compliment to the veteran botanist and traveler, T. Nuttall, Esq.

Rhododendron Windsori

This splendid colored garden Rhododendron, of a color even surpassing the Rhododendron arboreum, will be found invaluable, from its dwarf close-growing habit and large truss.

Rhododendron Camellicgflorum

A very curious species, discovered in the valley of Lablung, also on the Bootan Alps; at the latter place growing at an elevation of 9,000 to 12,000 feet In foliage it resembles R, Maddeni; 3 to 5 inches long. Corolla, sparingly scaly, 1 1/2 inch across; of a very thick texture; pure white, with a faint rosy tinge; all the segments obtuse and entire; the flower strongly resembling that of a single Camellia, from which its name is derived; a very distinct flower from any other Rhododendron.

R, Jenkinsi

This species, according to a specimen without flower or fruity in the herbarium of Sir W. Hooker, was found by the late Mr. Griffith, on the Khasya Hills, As a species, it is allied to Rhododendron Madenni, of Dr. Hooker; and these, along with Rhododendron sparsiforum, Rhododendron camelliaflousm, Rhododendron lucidum, and Rhododendron calophyllum, have a very peculiar aspect, all agreeing in their smooth lepi-dote leaves, and succulent texture. Mr. Booth supposed, from the examination of the buds, that Rhododendron Jenkinsi would have yellow flowers, the specimens having been collected in the month of December. It is named in honor of Major Jenkins, of the East India service. If, as is probable, this species has large yellow flowers, like Rhododendron Madenni, it will be one of the most distinct exhibition plants in the tribe.

Rhododendron Longifolium

A magnificent foliaged plant, discovered in the forest of Bootan, on the slopes of the Oola Mountains, at an elevation of 6,500 to 7,500 feet above the sea-level; the leaves 12 to 18 inches long, 8 to 5 inches wide in the middle; at first, pubescent; at length, smooth, or nearly so; gradually narrowed downwards; obovate, lanceolate, silvery, and whitish beneath. To all appearance, nearly hardy in this climate.

Rhododendron Keysi

A hardy, distinct shrub, growing to the height of two or three feet, on the mountains of Bootan, at an elevation of 9,000 to 10,000 feet above the sea-level, on the summit and northern ridges of the Lablung, forming low thickets, accompanied by Gaultherias and Tews above the range of Rhododendron Hookeri and Rhododendron Faleoneri; leaves two and a half to three inches long, about an inch wide; coriaceous, and smooth; beneath, as well as capsule, almost covered with brown circular resinous scales. Corymb, compounded of three or four branchlets, each containing five or six flowers. Corolla (judging from the withered remains only) tubular; the border five-lobed and'reflexed; the segments ovate, obtuse. Rather aromatic, from the resinous scales with which the leaves are clad beneath. In its native hills it grew amidst snows two or three feet in depth. It is allied to Dr. Hooker's Rhododendron virgatwn; the flowers, as in that species, axillary, or below the summit of the branch. A shrub very distinct in habit.

Rhododendrons #1

The following new kinds were recommended by the Rhododendron Committee as being very desirable:

Charles Dickens, dark scarlet .

Caractacus, dark purplish crimson .

Mrs . R . s . Holford, rich salmon, tender

Old Port, rich plum color, questionably hardy .

Lucidum, purplish lilac, with brown spots, tender .

Lord Clyde, intense blood color, tender .

Onslovianum, waxy blush, with yellow eye, questionably hardy .

Minnie, white, with chocolate spots, tender .

Sir Chas . Napier, rose with light center, tender .

Scipio, deep pink on edge, center light pink .

Mrs . John Waterer, deep pink at the edge, shading lighter to the center, tender .