PROTEACEZ. 387 
base of which the equal perianth-leaves are inserted all on a level. 
But in the second case it is oblique, and more or less bevelled; and 
this it is which causes the inequality of the perianth-leaves. These 
are sometimes collected into a straight tube, more or less swollen in 
the upper part, corresponding with the anthers; sometimes they 
form a bowed revolute sheath; and two often separate from one 
Grevillea Thelemanniana, 
Fie. 216. Fie. 217. Fre. 218. 
Floriferous branch. (Flower 2) Longitudinal section 
of flower, 
another along the edges at a variable height, to give passage to part 
of the style (fig. 223), while its stigmatiferous apex is retained be- 
tween the stamens’ and the closed summit of the perianth. The gyn- 
eceum is inserted on the centre of the receptacle in those species in 
which it is most slightly irregular; but where the base of the flower is 
very oblique, that of the pistil becomes similarly oblique, often for a 
considerable extent.* At the base of the foot of the ovary is a hypo- 
gynous disk, annular, or more frequently forming a semicircular scale 
or horseshoe on the placentary side of the gyneceum. The ovary 
is unilocular, surmounted by a bowed or straight style; this is 
very variably dilated towards the apex; and is surmounted by a 
stigmatiferous head which may be straight or oblique, and convex, 
1 According to R. Brown, and H. Mout (in 
Ann. Sc. Nat., sér. 2, iii. 314, the pollen is flat 
and triangular, with three large papilla on the 
angles, We have observed it in G. glabrata 
Muissy., Prodr. 391, n. 170 (@. Manglesii Hort; 
—Manglesia glabrata Linvt., Swan Riv., 37 ; 
—M. cuneata Exvu., Nov. Stirp. Dec.,i. 25, not.) 
(figs. 219-222). The grains have the same gene- 
ral form as in Onagraceea, with somewhat thin 
edges. On each of the three obtuse angles is a 
sort of cap, where a pollen-tube is sometimes 
produced very rapidly in contact with water. 
The surface is smooth or very finely punctate, 
sometimes prominent towards the centre of both 
faces. There are grains of exceptional form, 
quadrangular, or with the three angles unequal, 
the smallest of the three sometimes disappearing 
entirely. 
2 In this case the foot of the ovary appears 
welded to one side of the perianth for a long way ; 
but, it is really inserted along a very long un- 
equally developed, narrowly -bevelled receptacle. 
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