. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 300. Veronica apkylla, L, (after Herm. Miiller). A. Completely open flower. B. Half-closed flower, in which self-pollination is taking place (X 7). Visitors.—Herm. Miiller observed a Muscid, a Syrphid, and a beetle, on the Stilfser Joch. 2125. V. alpina L. (Herm. Miiller, ' Alpenblumen,' p. 270; Schulz, 'Beitrage,' II, p. 117.)—The minute flowers of this species, hardly 4 mm. in diameter, are homo- gamous, or sometimes feebly protogynous. Lindman found
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 300. Veronica apkylla, L, (after Herm. Miiller). A. Completely open flower. B. Half-closed flower, in which self-pollination is taking place (X 7). Visitors.—Herm. Miiller observed a Muscid, a Syrphid, and a beetle, on the Stilfser Joch. 2125. V. alpina L. (Herm. Miiller, ' Alpenblumen,' p. 270; Schulz, 'Beitrage,' II, p. 117.)—The minute flowers of this species, hardly 4 mm. in diameter, are homo- gamous, or sometimes feebly protogynous. Lindman found flowers on the Dovrefjeld to be at first protogynous and then homogamous. In Greenland, according to. Fig. 301. Veronica alpina^ L. (after Herm. Miiller). A, Flower seen directly from the front. B. Do., from above. C. Pistil and nectary (x 7). ^r, style; ?i, nectary; ov^ ovary; st^ stigma. Warming, the mechanism is the same as in the Alps. During unfavourable weather the flowers remain closed, and autogamy takes place by direct contact of anthers and stigma. Insect-visits are few. Visitors.—Herm. Miiller only observed a Muscid. 2126. V. arvensis L. (Herm. Miiller, 'Weit. Beob.,'Ill, p. 35 ; Kirchner, 'Flora V. Stuttgart,' p. 591.)—In this species the dark sky-blue corolla possesses a whitish nectar-guide, and is marked by darker streaks, but there is no nectar-cover. When expanded the flowers are 5 mm. in diameter. The filaments are not attenuated at the base. Anthers and stigma are at the same level, and so close together that 0 2. 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 Knuth, Paul, 1854-1899; Knuth, Paul, 1854-1899; Mu?ller, Hermann, 1829-1883; Ainsworth Davis, J. R. (James Richard), 1861-1934. Oxford : Clarendon Press
Size: 2468px × 1013px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheroxfor, bookyear1906
