This double-flowered dwarf Dahlia is certainly the most attractive of the genus. It is supposed to be only a variety of the D. pinnata, but the variation is almost powerful enough to constitute a species; as, besides the difference in its flowers, we have never found it arrive to more than half the height of the pinnata, although we have seen it every autumn for four years in luxuriant bloom. At present it is a scarce plant, and appears to be not quite so hardy as the taller species, nor so easily increased. Our figure was made from a plant in the collection of the Right Hon. Lady Holland, at Holland House, Kensington. [Illustration] PLATE CCCCLXXXIV. NICOTIANA GLUTINOSA. _Clammy Tobacco._ CLASS V. ORDER I. _PENTANDRIA MONOGYNIA._ Five Chives. One Pointal. GENERIC CHARACTER. CALYX. Perianthium monophyllum, ovatum, 5-fidum, persistens. COROLLA monopetala, infundibuliformis: tubus calyce longior: limbus patulus, 5-fidus, 5-plicatus. STAMINA. Filamenta quinque, subulata, vix longitudine corollas, adscendentia: antheræ oblongæ. PISTILLUM. Germen ovatum. Stylus filiformis, longitudine corollæ. Stigma capitatum, emarginatum. PERICARPIUM. Capsula sub-ovata, lineâ utrinque insculptâ: bilocularis: bivalvis, apice dehiscens: receptaculum dimidiatum, ovatum, punctatum: dissepimentis affixis. SEMINA numerosa, reniformia, rugosa. EMPALEMENT. Cup one-leafed, ovate, 5-cleft, and remaining. BLOSSOM one petal, funnel-shaped: tube longer than the calyx: segments spreading, 5-cleft, 5-plaited. CHIVES. Threads five, awl-shaped, scarcely the length of the blossom, and ascending: tips oblong. POINTAL. Seed-bud ovate. Shaft thread-shaped, the length of the blossom. Summit headed, and emarginated. SEED-VESSEL. Capsule nearly egg-shaped, with a line imprinted on both sides: two loculaments: two valves, splitting at the point: receptacle half-way divided, ovate, and dotted: dissepiments cleaving together. SEEDS numerous, kidney-shaped, and rough. SPECIFIC CHARACTER. NICOTIANA foliis petiolatis, sub-cordatis, glandulis minutis viscosis circumsessis: floribus alternis, solitariis, ad partem superam ramorum: corolla campanulata, pallide purpurea, viscosa: ramis glandulis minutis tectis, viscosis. Habitat in Peru. TOBACCO with petiolated and nearly heart-shaped leaves, beset with minute viscous glands: flowers grow solitary and alternate on the upper part of the branches: blossom bell-shaped, of a pale purple, and viscous: the branches covered with glands very small, and clammy. Native of Peru. REFERENCE TO THE PLATE. 1. The empalement. 2. The blossom spread. 3. Seed-bud and pointal.