an order, designated in Mr. Brown's remarks, as chiefly 

 european, with its maximum in the temperate climates of 

 the northern hemisphere, certainly much less frequent in 

 the corresponding southern parallels, and as having very 

 few known species within the tropics. 



Aquaticum grows in the swamps of Virginia and the 

 Carolinas; and was introduced by Mr. J. Banister, in 1699. 

 Two species were confounded under it by Linnaeus; but 

 have been since duly distinguished by M. Delaroche in 

 an elaborate illustration of the genus. All the american 

 species have simple linearly elongated leaves, with straight 

 parallel nerves, and form a section in the generic group, dis- 

 tinct in that respect from the european. 



The drawing was taken from a sample in the nursery of 

 Messrs. Frasers in Sloane Square, and was a part of the 

 collection annually imported from America by those in- 

 dustrious horticulturists; one of whom is now forming a 

 botanical establishment at Ramsgate. 



Perennial. Stem, in the specimen we saw, about a foot 

 and half high, upright, round, fluted, green, simple below, 

 branched above, at the top 2-5-divided: branches simple or 

 divided, seldom dichotomous, deeply fluted. Radical leaves 

 ambient, numerous, 6-9 inches long, from one to an inch 

 and half broad, sheathing, softish cinereously glaucous, 

 widishly ciliate with soft longish bristles, outermost recum- 

 bent : cauline ones shorter with broader stifFer bristles, other- 

 wise similar; floral ones ovately lanceolate, whorled, or else 

 opposite. Floiver-heads about | of an inch in diameter, 

 peduncled, round, whitish. Peduncles terminal, or in the 

 dichotomies, subangnlar, deeply fluted. Involucre 8-9- 

 leafletted; leaflets ovately acuminate, entire, spinously 

 pointed, but little shorter than the flower-head, spreading, 

 scarcely distinguishable from palece, which divide the florets. 

 Palece ovately lanceolate, entire, but little higher than the 

 florets. Receptacle conical. Germen inferior, armed above 

 with small white rigid ovate scales. Leaflets of the calyx 

 ovate, mucronate, with a scariose margin. Corolla white: 

 petals ovately oblong, deeply notched at the end. Fila- 

 ments nearly 3 times longer than the corolla, thickish: 

 anthers oblong, dark- coloured. 



