84 
CONTRIBUTIONS TO BOTANY. 
was also pulpy within ; but Swartz, the only botanist who has 
described it from actual observation, nowhere hints at the ex- 
istence of any pulp between the seeds, while he notices its 
presence distinctly in Tanaecium {Schlegelia) parasiticum. The 
fruit described by me {ante, p. 56) sufficiently agrees with the 
well-detailed account of Swartz of his Tanaecium Jaroba-, and 
there can be little doubt of its belonging to that species. It 
is therefore clear that the generic character given by Dr. See- 
mann {loc. cit. p. 82), excepting some misconception about the 
structure of the ovary, applies to Schlegelia, certainly not to 
Tanaecium. Endlicher, in his ‘Genera Plantarum,’ bases his 
diagnosis of Tanaecium (4172) entirely upon the T. parasiticum, 
Sw. [Schlegelia), and, in a note, points out its generic discord- 
ance with the T. Jaroba, Sw. [T. albijiorum, DC.), which he 
suggests may probably be a species of Crescentia, 
I need not repeat here the description already given [ante, 
p. 56) of the fruit of Tanaecium albijiorum, DC. Since that 
was written, I have seen the fruit of another species ( T. pra- 
longum), in which there is a somewhat different evolution of the 
placentae, which explains the apparent anomaly of the develop- 
ment, so dissimilar in the former case from the usual structure 
of the order. These two examples are most instructive, and 
serve to confirm in the strongest manner the hypothesis of the 
normally 4-carpellary structure of the ovary. The dissepiment 
is here composed, as usual, of the two chartaceous lamellar plates, 
united together for the greater part of their breadth ; but these 
plates divaricate when they approach the margins of the valves, 
and are thus respectively reflected away from each other upon 
them, as in Pithecoctenium, only for a much greater breadth, 
becoming agglutinated to the inner face of the valves ; and the 
seeds are attached by their very large hilum, partly to the re- 
flected margins and partly to the main portion of the dissepi- 
ment. In T. albijiorum, the attachment of the seeds is wholly 
upon the reflected margins of the dissepiment ; and when the 
fruit opens, these four placentiferous portions remain confluent 
with the two valves, while the main body of the dissepiment 
breaks away from them, along the line of their inflexion, close 
to the sutural margins of the capsule ; so that the seeds remain as 
if parietally attached to the valves, while the main body of the 
dissepiment, thus detached from its seminiferous portions, ap- 
pears flat, smooth, and naked. The fruit of T. prcelongum is of 
the same shape as that of T. albijiorum, only somewhat smaller; 
the ligneous valves are not quite so thick in substance, and they 
are covered with a closely adherent, coriaceous, rough epidermis, 
which can be scraped off the more ligneous shell. A similar 
coating exists upon the ligneous valves of Adenocalymna, Me- 
