. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. SCROPHULARINEAE 195 weather when the flowers remain half-closed. Kerner says that anthesis lasts for two 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 flow
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. SCROPHULARINEAE 195 weather when the flowers remain half-closed. Kerner says that anthesis lasts for two 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. 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
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