488 
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XVI. 
BISTORT. 
Bo gees? FSO RETA: 
HE flower is compofed of five fmall filaments, with three ftyles, contained in a colourett cup: 
This is formed of a fingle piece, imperforate at the bafe, and at the verge divided into five 
~ oval fegments, which naturally clofe together. After this comes a three-cornered feed, upon which 
the cup clofes and furrounds it. 
Linnzus places this among the offandria trigyn 
in each flower, oe 
1. Common Biftort. 
Biftorta vulgaris. 
The root is thick, and irregularly fhaped, 
brown on the furface, and red within. 
‘The leaves have long, red footftalks ; and are 
oblong, broad, and of a fine green. 
The ftalk is jointed, of a pale green, and 
two feet high. 
The leaves on it refemble thofe from the root: 
The flowers are of a fine flefh-colour, and 
ftand in a thick fpike. 
It is found in meadows, and flowers in June. 
C. Bauhine calls it Biforta radice minor intorta. 
Others, Bifforta vulgaris. 
The root is good againft fluxes of all kinds 
dried and powdered. 
2. Leffler Biftort. 
Biftorta winor. 
The root is oblong, thick, and of an irreou- 
lar form. , 
Gee Part 
Uses 
ia; the ftyles being three, and the filaments eight, 
The ftalk is round, jointed, and a foot high. 
The leaves are long and narrow, and of a deep 
green. s 
The flowers ftand in a long fpike at the top of 
the ftalk ; and are of a fine fleth-colour. 
We have it in Yorkfhire. It flowers in June. 
C. Bauhine calls it Biforta Alpina minor. 
3. Various-leaved Biftort, 
Biftorta foltis rotundis et oblongis. 
The root is thick and brown. ; 
The firft leaves are roundifh, and ferrated at 
the edges; and have long footftalks. 
The ftalk is four inches high. 
The leaves on it are flender, and the flowers 
ftand in a thort {pike. 
We have it on our-northern mountains. It 
flowers in June. 
Ray calls it Biftorta minima Sohis imis fubro- 
tundis. 5 
XVII. 
PONDWEED. 
PE OVUMCye  . OS ere e ene 
HE flower has no petals, The cup is compofed of four fmall, 
ends ; and is fucceeded by four feeds, of a roundith form, 
Linneus places this among the tetrandria tetragynia 
ftyles. 
1. Broad-leaved Pondweed. 
Potamogiton latifolium. 
The root is compofed of long fibres, con- 
nected to_a fhort head. 
The ftalk is weak, brown, and two feet or 
more in length, partly immerfed in water, and 
partly lying on it. 
The leaves under water are narrow; thofe on 
the top broad, oval, and high ribbed, 
The flowers are fmall and whitith ; and they 
ftand in long, flender fpikes. 
Tt is common in waters, flowering in Augutt, 
C. Bauhine Calls it Potamogiton rotundifolium. 
2. Perfoliate Pondweed. 
Potamogiton perfoliatum. 
The root is fibrous, 
The flalk is round, and two feet or more in 
length, -but naturally grows under water. 
oval leaves, obtufe at the 
but {welling one fide, and pointed, 
3 the flower having four threads, and four 
_ The leaves are of an oval form,. and furround 
the ftalk at the bafe. 
The flowers ftand in flender fpikes, rifing from 
their bofoms. : 
It is common in rivers, flowering in July. 
C. Bauhine calls it Potamogiton foliis. latis 
Splendentibus. 
3. Oak-leaved Pondweed. 
Potamogiton quercus foliis crifpis. 
The root is fibrous. 
The ftalk is weak, and eight inches long, and 
grows under water. 
The leaves are very beautiful, of a brownith 
green, oblong, obtufe, and waved at the edges. 
The flowers grow in flender fpikes from their 
bofoms, and are whitifh: thefe alfo refemble the 
flowers of the oak. 
6 ; If 
