. The different forms of flowers on plants of the same species. Plants; Fertilization of plants; Heterostylism. Long-styled. Mid-styled. Short-Styled. OxALis SPECIOSA (with the petals removed). S S S, stigmas. The dotted lines with arrows show which pollen must be carried to the stigmas for legitimate fertilisatioii. form, the stigmas also pass out between the filaments nearly on a level with the tips of the sepals. The anthers in this latter form and in the mid-styled rise to the same height as the corresponding stigmas in the other two forms. Oxalis Valdhiana.—This species, an inhabitant of
. The different forms of flowers on plants of the same species. Plants; Fertilization of plants; Heterostylism. Long-styled. Mid-styled. Short-Styled. OxALis SPECIOSA (with the petals removed). S S S, stigmas. The dotted lines with arrows show which pollen must be carried to the stigmas for legitimate fertilisatioii. form, the stigmas also pass out between the filaments nearly on a level with the tips of the sepals. The anthers in this latter form and in the mid-styled rise to the same height as the corresponding stigmas in the other two forms. Oxalis Valdhiana.—This species, an inhabitant of the west coast of South America, bears yellow flowers. Hildebrand states that the stigmas of the three forma do not differ in any marked manner, but that the pistil of the short-styled form alone is destitute of hairs. The diameters of the pollen-grains are as follows:— Divisions of tlie Micrometer. irom the longest stamens of short-styled . . 8 to 9 n mid-length „ „ . . 7 „ 8 >» longest stamens of mid-styled . . 8 ji shortest „ „ . 8 71 mid-length stamens of long-styled . 7 n shortest ,, ,, . i . <3. 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 original Darwin, Charles, 1809-1882. New York, D. Appleton and company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1897
