19 
ORONTIUM aavaticum. 
Aquatic Orontium. 
HEXANDRIA MONOGYNIA.—Nar. Onv. AROIDEZ. 
Gen. Cuan.—Spadix cylindricus tectus flosculis. Spatha nulla. Pertan- 
thium simplex, hexaphyllum, foliolis inflexis. Stylus nullus. Utriculus 
monospermus. 
Orontium aguaticum; foliis lanceolato-ovatis.— Willd. 
O. aquaticum, Linn. Sp. Pl. p. 463.—Amen. Acad. v. iii. p. 17. t. 1. £. Sm 
Win. Sp. Pl. v. ii. p.199.—Arr. Hort. Kew. ed. 2. v. ii. p. 306.—-Pursx, 
Fil. Amer, Sept. v. i. p. 235.—Nutr. Am. Pl. v. i. p. 227. 
Whole plant smooth (according to Surrx), with floating foliage, and like a 
Potamogeton in its mode of growth. Leaves upon long cylindrical stalks, 
varying, as it would appear, remarkably in their form; in my specimens 
broadly elliptical and acute, characterised by most authors as lanceolato< 
ovate, whilst Pursn observed a variety growing in sal near 
New York, with almost linear leaves. They are quite entire at the mar- 
gin, nearly plane on the surface, dark green, and marked with a num- 
ber of parallel ribs, which are connected by faint transverse lines. The 
lamina of the leaf is fixed upon the summit of the pefiole in such a man= 
ner as to leave a depression in front, and the petiole becomes almost im- 
mediately cylindrical. - 
Scape long, cylindrical, green, thickened, and much yellower above ; termi- 
nating in the conico-cylindrical greenish-white spadix, about 2 inches in 
length, totally destitute of spatha. ‘ * 
_ Florets crowded, composed of a single perianth, of 6 yellowish-green leaflets, 
ian 
VOLE 
* 
