CONTRIBUTIONS TO BOTANY. 
35 
Quine hamalium we meet with a still nearer approach to the last- 
mentioned genus, for its calyx is also quite free, and in the form 
of an urceolate tube with a 5 -toothed border ; we have likewise 
a similar fleshy hypogynous disk, wholly adnate with the ova- 
rium, and bearing on its margin a gamopetalous corolla ; here 
also we perceive a similar development of the very prominent 
epigynous gland, that covers the somewhat depressed conical 
apex of the ovarium, but in this instance it rises in the form of 
a 5 -grooved cylindrical tube, wflth a border of five rounded pa- 
tent lobes, encircling the base of the style, and quite free from 
it. In Arjoona, as in Myoschilos, the calyx consists of three 
imbricate leaflets, but the outer one is considerably larger, and 
being 3-nerved, it consists probably of three confluent leaflets, 
so that the normal number of its sepals will hence be five, corre- 
sponding with that of the lobes of the border and stamens : the 
hypogynous disk is here less conspicuous, but it still exists, 
wholly adnate and continuous with the tube of the corolla : the 
epigynous gland is highly developed, being entirely free from 
the base of the corolla, by which it is concealed ; the style origi- 
nating on its umbilical and rounded apex. These three genera 
have hitherto been placed in Santalacece, but it is evident that 
to whatever order they belong they must be classed side by side 
with Schopfia, a decidedly Olacaceous genus. In all the genera 
of the Santalacea, we meet with the presence of a large cupuli- 
form disk, supporting the stamens externally on its lobed margin, 
and forming a most prominent and constant feature, but with this 
difference, that while in Olacacece this disk is frequently adnate 
with the ovarium and free from the calyx, in Santalacece it never 
invests the ovarium, but is adnate with the tube of the perigo- 
nium or calyx, forming generally a deep cup about the superior 
moiety of the ovarium, which in most of its genera is only half 
inferior : the cupshaped disk, in these cases, is therefore conti- 
nuous with the fleshy epigynous gland. I am aware that it 
might be, as it has already been contended, that in Schopfia its 
disk may be looked upon as an adnate calyx, its corolla as a pe- 
rigonium, and its calyx as a tubular involucre ; but such an ar- 
gument can no longer be tenable when confronted by the struc- 
ture seen in Liriosma and Cathedra, where we find a true solu- 
tion of the nature of the cupuliform disk. There is however 
always this essential difierence constantly existing between the 
two families : in the Olacacece the insertion of the corolla and 
stamens is on the margin of the disk ; in the Santalacece this in- 
sertion is always outside of it ; in the former these organs are 
articulated with it, and easily fall away ; in the latter family it is 
impossible to separate the free lobes of the perigonium and sta- 
mens without force, and a rupture of the parts. But notwith- 
F 2 
