230 MR. JOHN MIERS ON THE LOASACEE. 
with that seen in Eeeromocarpus and other Bignoniaceous genera, where the seed has an 
opake disk, surrounded by a broad annular membranaceous wing, as in Bartonia; there, 
a manifest hilar point is seen on the edge of the disk, not on the wing, and a distinet 
linear raphe extends across it, from that hilar point, till it reaches the opposite edge of 
the disk, at the chalazal point where the two integuments adhere together. It is quite 
different in Bartonia, where, owing to the absence of a raphe and chalaza, the inner 
integument floats in the centre of the outer membranaceous sac, without any visible 
point of attachment between them; in this case, the great transparency of the two inte- 
guments renders a mistake impossible. 
A third instance of the same anomalous structure is found in Blumenbachia, where 
the outer coating of the seed is a cancellated lax integument resembling that of Gripidea; 
it is three times the length and twice the breadth of an inner oval body which is very 
dark and opake, and which floats in the centre of the large vacant space, without the 
smallest apparent organic connexion between it and the outer cancellated tunie: this 
inner body has a thin covering of white cellular tissue of papery consistence, though so 
lax as to be easily wiped off by a slight friction ; beneath it, is a firmer, brown, but deli- 
cate integument, with a rugous surface, having a small depression with a minute papilla 
at its apex, and a scarcely perceptible mamillary projection at its base, without any 
scar or thickening of the integument; nor is there the slightest vestige of a raphe, which 
would certainly be seen if it were present, for this coating, when removed, is transparent 
and, as well as the others, regularly reticulated ; this third integument tightly invests a 
fleshy albumen, which shows the same apical depression and almost imperceptible basal 
protuberance as in the investing tunie; it encloses an embryo with a superior terete 
 radicle, and oblong flattish cotyledons equal to it in length and somewhat broader 
than it. | | 
The seed of Caiophora, which has not hitherto been correctly described, presents 3 
similar phenomenon; its outer tunic is long and cylindrical, but, unlike the former 
instances, it closely invests the inner integument; it is provided at its apex with a per- 
sistent black polished process, and is singularly furnished from top to bottom with about 
twelve broad, equal, longitudinal, radiating wings, whose breadth equals the diameter of 
the tunic; the cylindrical portion is transparent and regularly reticulated, but the wings 
are marked along their margin and at equal distances by simple transverse bars, whieh 
make as many rectangular areolar spaces, filled by a hyaline delicate membrane faintly 
striated by oblique and nearly parallel veins ; the wall of the cylindrical portion, though 
quite transparent, shows no indication of a raphe. The second tunic is opakely white, 
pike Blumenbachia, and is in like manner formed of rather lax cellular tissue; X # 
> outer Coating, as well as from the third integument, except at " ke 
closely Cond x point t the apical black strophiolar process before pere E | 
Fete ete third delicate reticulated brown coating, which resembles th ie 
< wmenbachia, and has à minute black speck at its summit and base; but there is 
mai i qan vessels upon any of the three integuments. The embryo, pe : 
how Là | y albumen, is long, narrow, perfectly terete, with a superior 
T is nger than its cotyledons, which are equal to it in thickness. 
c* 
