CONTRIBUTIONS TO BOTANY. 
231 
spongiose rigid network on the exterior side ; its inner portion 
is osseous, angular, and contains a single seed : this semini- 
ferous cell is somewhat incurved longitudinally round another 
spurious cell, with which it has a placentary communication 
through a small spot to which the single seed is attached by 
its middle ; this spurious cell is filled with nourishing tissue, 
and has a large foramen opening externally on one side of the 
nucule, either on the right or left side ; for the foirr nuts are 
geminately arranged in pairs, as in Rfiahdia, and in each pair, 
upon their contiguous sides, these foraminal openings face one 
another, while the opposite sides are plane ; and through these 
channels the nomnshing vessels from the placentary column 
are seen to enter each cell : the seed, which fills the true cell, is 
cylindrical, somewhat incurved as before mentioned, and at- 
tached by its middle to the placentary point ; upon the integu- 
ment on that side a line of descending raphe runs from tlie 
hilum to a small basal chalaza. Although Gaertner, by mis- 
take, reversed its position, he was quite correct in stating that 
the embryo is enclosed in a rather thick fleshy albumen, not- 
withstanding that Prof. A. De Candolle mentions that he had 
been unable to find it. The calyx and corolla resemble those 
of Crematomia, only that the lobes of the border in Bourreria 
are simple, not auriculated ; the style is more shortly bifid ; 
the ovayy has the placentation of Rhahdia. 
Bourreria, Browne ; — Beurreria, Jacq^. ; — Ehretise sect., DC. 
— Calyx ad medium tubulosus, coriaceus, superne in lobos 5 
(rarius 6) acutos divisus, marginibus crassis, tomentosis, 
aestivatione valvatis, firme adhaerentibus, demum solutis, vel 
interdum false 2-3-lobus, persistens. Corolla gamopetala, 
tubo calyce paulo longiore, limbi laciniis 5 (rarius 6),oblongis 
vel rotundatis, patentibus, tubo paulo longioribus, aestiva- 
tione valde imbricatis. Stamina 5 (raro 6), alterna, longius- 
cule exserta aut vix exclusa ; Jilamenta subulata, carnosula, 
medio tubi vel sub faucem alfixa, saepe cum costis totidem 
decurrentibus continua ; antherce oblongas, 2-lobae, lobis 
coriaceis, saepe rugulosis, imo a medio divergentibus, superne 
collateraiiter adnatis, utrinque rima longitudinali nivea late- 
raliter dehiscentibus, sinu dorsali ad filamentum breviter cur- 
vatum versatiliter affixae : pollen globosum, tela tartarea in- 
termixtum. Ovarium oblongum, striatum, disco parvo suf- 
fultum, semiseptis e parietibus 2 oppositis intergerivis, mox 
in crura magna utrinque divaricatim recmwis, septa 2 pa- 
rallela subincompleta etformantibus, marginibus omlum 
singulatim amplectentibus, hinc pseudo-4-ioculare, 4-ovu- 
latum : columella compressa, membranacea, septis parallela, 
VOL. II. 2 H 
