AQUARIUMS AND AQUATIC P.'. A NTS. 
155 
of this there is also a double-flowered variety. 
S. nutans, (floating,) and S.falcata, (falcate,) 
both Carolina species, have white flowers in 
July and August, and grow a foot high The 
following require slight protection: — S. Do- 
Sagitlm-ia sagittifolia, 
niana, (Don's,) has white flowers in July and 
August, and is a native of Nepal : S. obtusa, 
obtuse,) S. heterophylla, (various-leaved,) 
S. hastata, (hastate,) and >S'. graminea, (grass- 
leaved,) all North American plants, and all 
having white flowers, blooming in July and 
August : they belong to the natural order 
Alismaceae, 
Saururus. (Lizard's Tail.) — These are 
herbaceous perennials, with neat foliage, but 
no beauty in their flowers. S. cernuus, 
(drooping,) grows two feet high, and has 
heart-shaped leaves. S. lucidus, (shining,) 
grows a foot and a half, and has deeply cor- 
date-ovate leaves. Both these are North 
American plants. $. chinensis, (Chinese,) 
requires a frame, and has also cordate-ovate 
leaves. These plants belong to the natural 
order Saururacea?. 
Sparganium. (Bur-reed.) — There are four 
species, perennials, natives of Britain. S. 
ramosum, (branched,) grows two feet high, 
and has long narrow leaves , and a branched 
stem ; jS. simplex, (simple,) grows a foot 
and a half high; S. nutans, (floating,) and 
$. alpinum, (Alpine,) are floating plants ; 
they belong to the natural order Typhaceas. 
Stratiotes aloides. (Aloe-like Water Sol- 
diers—This is a stiff erect plant, of two feet 
high, with saw-edged, sword-shaped leaves, 
and producing white flowers in June and 
July. It is a perennial plant, increasing 
rapidly, and has the. peculiarity of growing 
entirely under renter, above which it risos at 
.the time of flowering only. It belongs to the 
natural order Ilydrocharidacea;. 
Subularia aqualica, (water Awlwort,) is a 
curious little native perennial plant, with awl- 
shaped leaves and inconspicuous flowers. It 
belongs to the natural order Crucifera. 
Swertia perennis, (perennial Felwort,) is a 
perennial with an upright stem, about a foot 
high ; the root-leaves are oval, and the flowers 
are purple, produced in July and August. It 
is found in England in marshy places. It be- 
longs to the natural order Gentianacea?. 
Symplocurpusfcetidus, (fetid Symplocarpus.) 
— A curious inconspicuous plant from North 
America, belonging to the natural order Oron- 
tiacese. 
Teucrium Scordium, (water Germander,) 
has a procumbent diffuse stem, with oblong 
sessile leaves, and bears pink flowers in July 
and August. It is found wild in marshy 
places, and belongs to the natural order 
Lamiaceae. 
Tludia dealbata, (mealy Thalia,) is an in- 
teresting plant, with ovate leaves and blue 
flowers, which open in July and August. It 
is a tall growing plant, from South Carolina, 
and requires slight protection : planted at two 
feet beneath the surface of the water, it with- 
stands the severity of our winters, and flowers 
beautifully. It belongs to the natural order 
Marantacere. 
Trupa natans, (floating "Water Caltrops,) is 
an annual floating plant, with small white and 
purple flowers, which are produced from June 
to August : the stalks of its roundish leaves 
are hollow and inflated. The seeds (nuts) of 
this plant are farinaceous, nourishing, and 
pectoral ; they contain a white sweet kernel. 
They are called Jesuit nuts in Venice, and 
are also much eaten in Switzerland and the 
south of France. It belongs to the natural 
order Haloragacea?. 
Ti/pha. (Cat's-tail.)— These are noble- 
looking perennial reedy plants. T. latifolia, 
(broad-leaved,) has leaves an inch wide and 
three feet long, and grows six feet high, bear- 
ing close cylindrical black-looking catkins at 
the top of the flowering stem : it is found in 
every part of the world. T. angustifolia, 
(lesser,) has much narrower leaves, and grows 
four feet high. T. minor, (dwarf,) grows two 
feet : these are native plants. T. minima,, 
(least,) a Swiss plant, grows only about a foot 
high. They belong to the natural order 
Typhaceai. 
Utricidaria, (Bladder-wort,) consists of three 
native species, of an exceedingly delicate and 
fragile texture, but very fugacious, and hardly 
susceptible of cultivation. It is named Blad- 
der-wort from the little inflated appendages to 
the slender roots, by means of which the plants 
are enabled to float. In hot countries the 
species are numerous and very beautiful. The 
three native species which arc found in pools 
and ditches, are called V. vulgaris, (common,) 
U. intermedia, (intermediate.) and U. niiiwr, 
