an order, designated in Mr. Brown’s remarks, as chiefly 
european, with its maximum in the teniperate 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 Linnzeus; 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. Flower-heads about 3 of an inch in diameter, 
peduncled, round, whitish. Peduncles terminal, or in the 
dichotomies, subangular, deeply fluted.  Involucre 8-9- 
leafletted; Jeaflets ovately acuminate, entire, spinously 
pointed, but little shorter than the flower-head, spreading, 
scarcely distinguishable from palew, which divide the florets. 
Palee 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. 
