. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 12. Nectaries of sOTjte RanuncJilaaae. (Enlarged. From Nature.) 1. Ranunculus sceleratus, L. 4- Aquilegia vulgaris, L 2. Trollius europaeus, L. 5- Aconitum Napellus, L. 3. Helleboriis niger, L. â 6. Nigella arvensis, L. », Nectary. p, limb. s, stalk. d. cover. /i, protuberance. of special glands (nectaries). These are sheltered in the most varied ways : between a fully-exposed position, in most of the Umbelliferae, and concealment in long corolla-
. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 12. Nectaries of sOTjte RanuncJilaaae. (Enlarged. From Nature.) 1. Ranunculus sceleratus, L. 4- Aquilegia vulgaris, L 2. Trollius europaeus, L. 5- Aconitum Napellus, L. 3. Helleboriis niger, L. â 6. Nigella arvensis, L. », Nectary. p, limb. s, stalk. d. cover. /i, protuberance. of special glands (nectaries). These are sheltered in the most varied ways : between a fully-exposed position, in most of the Umbelliferae, and concealment in long corolla-tubes (Lonicera Caprifolium), or in long spurs (Corydalis cava), there are numerous gradations, so that Herm. Muller has established eight classes of flowers, according to the position of the nectar, and the insect visits which are determined by. 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; MuÌller, Hermann, 1829-1883; Ainsworth Davis, J. R. (James Richard), 1861-1934. Oxford : Clarendon Press
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