marina. 
POLYANDRIA. POLYGYNIA. Zostera. 
Stamens and Pistils Poy generally ey in the same flower, 
but they have been sometimes observed to be on different plants ; 
and where they are ate e in the same eee the anthers have 
been found to be barren, Linn. Leaves strap-sha inted, 
aped, po 
gristly ; pescad prickly. Stalk 2-edged, 1 jeftowernde Sheath 
the P 
as long a fruit-stalk ; sheath-leaves 2, concave, pointed. 
Calyx beavas's 3, white, egg-shaped, blunt. Petals egg-shaped, 
ans 28 genes, . 
loes. Freshwater Soldier. Slow streams, and fen 
Sime Tih Norfolk, very frequent. Mr. Woopwarp. In 
Is about 4 miles from Holmes Chapel, Chesh. Mr. Hunter. 
ithe Gyme near Thorn, EERE Mr. _ 
- P, June—July.* 
POLYGYNIA. | 
ZOSTERA. Spike-stalk strap-shaped, concealed 
within a grass-like leaf, bearing the fructifi- 
cations on one side: ohh none: bloss. none: 
stam. alternate : caps. a cue : seeds solitary. 
Z. Seed-vessels sitting. 
a POR. bee, we dan. 15, 
Stems much branched. Leaves floating, long, grass. ike 
blunt, from Jeaf- igilen Leafscle heeeuis + pee nted. Floqwe’ 
ina cavity, 3 or 4 inches the leaf near a the 
base, which is at first pide Sith a wee transparent skin. 
Woopw 
Sea Gra sswrack. On the sea shores, almant every where, [Salt 
water aitciies, Yarmouth. Mr. Woopwarp.] P. June—Aug.t 
* Jn the autum the plants sink to the bottom of the water, and in 
the Spring from amongst the leaves of the old plants arise numerous 
thick suckers, each bearing a young plant, Bites pr and floats on, the 
pine gelg it grows to maturity. Som es 8 or 10 form a circle on 
pon Sg surface, to which the strings were radii, atid the old plnt bt t the bot- 
a the abana and in this manner they sometimes rise sv thick as en- 
tirely to fill up the one of ditches, preventing all other plants from 
growing init. I should suppose the mother plant decays, as the floating 
plants sheot o inex; which, if t not sooner, on sinking probably 
lay hold of the mud, and these in the Spring, | apprehend, produce the 
tresh offsprin such be its mod » itis an ex e of 
biennial ofa very singular nature. W ARD. A great variety of insects 
are nourished by this plant; some of them pursue it down to the bottom 
and devour the leaves. Sw t es 
+ Thrown on the sea shore by the tide, in great plenty, and mounds 
or walls are built with it to oppose the encroachment of the sea. Ex- 
posure to the weather bleaches it white. Buildings are thatched with 
the green leaves, and it will endure upwards of a century. It is used 
the ig a f Gothland, in Sweden, as a manure, and also for stuffing 
nN preference to “hay, as being softer.—Horses and swine eat it. 
Cows pas not fond of it 
i] 
ee 
aia 
