. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 8 ANGIOSPERMAE—DICOTYLEDONES possibly skg. nectar. D. Lepidoptera. Rhopalocera : 5. Rhodocera rhamni Z. (H. M.), settling: for a considerable time and probing various parts of the base of the flowers with the tip of its extended proboscis ; 6. Vanessa urticae Z. (Kn.), possibly skg. nectar. 14. H. angulosa DC.— Loew observed on the flowers in the Botanic Garden at Berlin.—Hymeno- ptera. Apidae: Apis mellifica Z. 5, po-clig. 5. Pulsatilla Tourn. Protogynous f
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 8 ANGIOSPERMAE—DICOTYLEDONES possibly skg. nectar. D. Lepidoptera. Rhopalocera : 5. Rhodocera rhamni Z. (H. M.), settling: for a considerable time and probing various parts of the base of the flowers with the tip of its extended proboscis ; 6. Vanessa urticae Z. (Kn.), possibly skg. nectar. 14. H. angulosa DC.— Loew observed on the flowers in the Botanic Garden at Berlin.—Hymeno- ptera. Apidae: Apis mellifica Z. 5, po-clig. 5. Pulsatilla Tourn. Protogynous flowers with concealed honey (rarely pollen flowers). Nectar secreted by external vestigial stamens. The large brightly-coloured sepals serve for attraction. In addition to the hermaphrodite flowers, some species (P. vulgaris, vernalis, pratensis, and montana) possess others which are andromonoecious and androdioecious, gynomonoecious, and gynodioecious. 15. P. vulgaris Miller (= Anemone Pulsatilla Z.). (Sprengel, 'Entd. Geh.,' p. 290; Herm. Muller, 'Weit. Beob.,' I, pp. 313-14; Schulz, ' Beitrage,' I, p. 2; Knuth, ' Bl. u. Insek. a. d. nordfr. Ins.,' pp. 17, 147, ' Bloemenbiol. Bijdragen.')—. Fig. 3. Piilsaiilla vulgaris^ L. (from nature), l. Flower from which the two anterior sepals have been removed. 77, nectaries. The numerous stigmas project beyond the anthers. 2. Stigma \s) of a central carpel. 3- Stigma (^) of a marginal carpel. {2 and 3 highly The large blue-violet sepals form an effective means of attraction to the erect flowers. In the first flowering-stage the stigmas are already receptive, and they remain in this condition for the next two to four days, while the extremely numerous stamens are dehiscing. Nectar—as in the case of the following species—is secreted by the outer- most stamens, which are converted into stalked capitate structures. As the stigmas project far above the longest stamens (see Fig. 3, i), pollen-collecting and nectar- su
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