. The natural history of plants. Botany. 442 NATURAL HISTORY OF PLANTS. are free except in a variable extent of the lower part, and the anthers are bilocular, introrse, dehiscent by two longitudinal clefts. The gynEeceum is composed of three ovaries, almost or completely independent, from whose base rises a style, or more rarely two or three (unequal in that case), whose stigmatiferous apex is more or less dilated. In the internal angle of each ovary is found a placenta supporting a descendent anatropal ovule with superior micropyle, finally lateral. The fruit is formed of one to three samarse
. The natural history of plants. Botany. 442 NATURAL HISTORY OF PLANTS. are free except in a variable extent of the lower part, and the anthers are bilocular, introrse, dehiscent by two longitudinal clefts. The gynEeceum is composed of three ovaries, almost or completely independent, from whose base rises a style, or more rarely two or three (unequal in that case), whose stigmatiferous apex is more or less dilated. In the internal angle of each ovary is found a placenta supporting a descendent anatropal ovule with superior micropyle, finally lateral. The fruit is formed of one to three samarse, whose backs are surmounted by a vertical wing, analogous to those of Ja^usia Pig. 451. Flower (a).. Pig. 452. Longitudinal section of flower. Banisteria (fig. 439), and whose cavity contains a bent seed, with ventral hilum, coats thin covering a fleshy embryo, superior short radicle, and thick cotyledons usually unequal. Schwannia consists of climbing shrubs; five species ^ have been distinguished, natives of tropical Brazil. The leaves are opposite, and the flowers are arranged in small umbelliform cymes, often quadrifloriate, generally collected in compound terminal clusters. Janusia (fig. 451, 452) is allied to Schwannia; the petals are entire, and the stamens, ten in number, may all be fertile ; but it also happens that one or a small number of them remain sterile. The fruit is also formed of two or three samarse. But the most re- markable fact observed in this genus, and which will be found in all those following it, is, that beside the normal flowers, there are. ' Grisbb. Linnaia, xiii. 188 {JFimlriaria); Rep. 9, t. 1.—Walp. Rep. v. 353; Ann. vij. Mart. M. Bras. Malpigh. 101, 102, t. 221 476. {Janusia). — G-aiSBB. Pacif. Surv. vii. Sot. ^ Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the origina
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1871
