certain Species of the Genus Chris tisouia. 1 1 3 
The calyx and corolla both bear short secretory glands. 
These glands supply the mucilaginous covering to these parts, 
which serves, perhaps, as a protection against the attacks 
of crawling animals, which must abound in the neighbourhood 
of these plants. 
The stamens are four in number. They are epipetalous. 
The four anthers are united together. A transverse section of 
the anther shows in the young stage a bilocular construction, 
each loculus being more or less crescent-shaped, owing to the 
projection into the cavity of a broad, conical band of sterile 
tissue from the connective. A single layer of radially-elon- 
gated tapetal cells lines the cavity. The pollen-mother-cells 
divide tetrahedrally to form pollen-grains ; occasionally a 
cruciate division was observed. The external layer of the 
wall of the anther consists of rounded, thick-walled cells ; 
when the pollen-grains are ripe, the partition-wall between 
the two loculi breaks away, so that the anther thus becomes 
unilocular ; the soft-celled inner layers of the anther-wall 
shrivel up, while the external layer of thick-walled cells 
remains intact, and scarcely ever broke when the anther 
was cut. 
The stigma is a wide, expanded surface, covered with 
papillate, hair - like cells, which are much elongated and 
pointed ; their tips, however, being obtuse and rounded off. 
The subjacent tissue is quite loose. 
The style possesses two bundles on opposite sides of a 
central cavity, which in the upper part of the organ is filled 
with much-elongated cells whose cavities are widely separated 
by their mucilaginously-swollen walls. 
The ovary consists of two carpels, and is unilocular through- 
out. The placentation is parietal, consisting of two opposite 
bi-partite placentas expanding into the ovarian cavity and 
almost filling it. They bear over their surface very numerous 
anatropous ovules, which are embedded in mucilage and are 
extremely small. 
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