RUTACEZ. 381 
supports a slightly gamosepalous calyx, with deep divisions imbri- 
cated in the bud. The petals alternating with the divisions of the 
calyx are free, clawed, hollowed above into a spoon-shape, more or 
less cut upon the edges, and arranged in the bud in an imbricated 
or contorted præfloration. The stamens are ten in number, disposed 
Ruta (Euruta) graveolens. 

Fie. 397. 
Long. sect. of seed. 
Fie. 395. 
Dehiscent fruit (3). 
Fie. 396. 
Seed (7). 
upon two verticils, superposed five to the divisions of the calyx, and 
five shorter to the petals, each composed of a free filament and a 
basifixed,' two-celled anther dehiscing within or upon {the edges by 
two longitudinal clefts.® Above them the floral receptacle dilates 
into a thick circular glanduliferous* disk surrounding the base of the 
gyneceum. This is formed of five oppositipetalous carpels, the 
ovaries of which are free,’ one-celled, each surmounted by a style 
springing from the summit, and from within the ovary, free at the 
base, but proceeding to meet the other styles, and to unite with 
them in forming a column apparently single, surmounted by a very 
small stigmatiferous dilatation. In the internal angle of each ovary 
is a parietal placenta supporting an indefinite number of ovules, 
inserted in, two ranks, anatropous, looking at each other by their 
raphes, subtransverse or more or less oblique, according to the height 
at which they are inserted.’ The fruit, accompanied at its base by 
the dried calyx, is formed of five follicles longitudinally dehiscing 

1 The successive and alternating movements of 3 The large glands are sometimes arranged on 
the stamens at the period of impregnation have 
drawn the attention of a great many observers, 
The filaments at first incline towards the style, 
afterwards spreading round the flower. At this 
moment the anthers are emptied of their pollen. 
The very pointed summit of the filament is often 
inserted at the bottom of a conical cavity, hollowed 
in the connective. 
2 he pollen is “ ovoid, three folds ; in water, 
round with three papillose bands.” (H. Mout., 
in Ann. Se, Nat., sér. 2, iii, 339.) 
the disk with tolerable regularity, so as to cor- 
respond to the stamens, being placed alone or in 
pairs above the insertion of each. 
4 Except at the base, where they are slightly 
united among themselves, and especially con- 
nected with each other by that part of the 
receptacle upon which they are widely in- 
serted, 
5 They have two coats. 
