Diference of Structure in the Flowers of fix Species of Pafffora. 25 
Paffiflora cærulea, Linn. TAB. 4, fig. d. 
however common, is very curious in its conftruétion, differing in 
many particulars from all that I have feen. This beautiful flower 
is generally efteemed; and, if we examine the parts of wit it is 
compofed, it will luii add to our admiration. 
I. Peduncle Cylindrical, fwelling a little at the bafe. 
2. Involucrum "Three ovateentire leaves, a little concave. 
3. Pedicle Cylindrical, thickening at each end. 
4. Petals The outer five or fix a little flefhy, ob- 
long, rather obtufe; inner narrower 
and thinner, about the fame length. 
5. Principal rays Two rows, horizontal, threadlike, a little 
pointed, nearly alike, under each other. 
6. Imperfect rays One regular row, with roundifh heads, 
on little footftalks, ftanding ere& on 
an horizontal elevated plane at the 
bafe of the principal rays: within 
thefe imperfe& rays are a very dif- 
ferent fet, entire at the infertion, di- 
vided into threads about half way 
down, and inclining againft the co- 
lumn. On the under fide is a protu- 
berance which catches the margin of 
the operculum. 
7. Imperfect operculum None. 
8. Operculum Spreading from the column under the 
aforefaid rays. 
Round the bafe of the column, with a 
thick protuberance* round the fide of 
the lower part of the flower, on which 
refts the operculum, and which almoft 
divides it into two cells. 
9. Nectary 
* This protuberance feems to form an antichamber to the neCtary. 
| VoL. Il. E Pafliflora 
