. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 358 ANGIOSPERMAEâDICOTYLEDONES. Fig. 359. Dafhtie striata, L. (after Herm. Muller). E. Flower in longitudinal section ; w, nectary. F. Flower from above. 5. Bombus hortorum L. 5, skg. (Kn.); 6. Halictus cylindricus F. $ (Kn., H. M.); 7. H. leucopus K. 5 (H. M.) ; 8. H. minutissimus K. ^â , 9. H. nitidus Schenck 5 ; all skg.; 10. Osmia fusca Chr. t (H. M.); 11. O. rufa Z. $ and S (H. M.), skg. C. Lepidoptera. Rhopalocera: 12. Rhodocera rhamni L. (Kn., Lud.),
. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 358 ANGIOSPERMAEâDICOTYLEDONES. Fig. 359. Dafhtie striata, L. (after Herm. Muller). E. Flower in longitudinal section ; w, nectary. F. Flower from above. 5. Bombus hortorum L. 5, skg. (Kn.); 6. Halictus cylindricus F. $ (Kn., H. M.); 7. H. leucopus K. 5 (H. M.) ; 8. H. minutissimus K. ^â , 9. H. nitidus Schenck 5 ; all skg.; 10. Osmia fusca Chr. t (H. M.); 11. O. rufa Z. $ and S (H. M.), skg. C. Lepidoptera. Rhopalocera: 12. Rhodocera rhamni L. (Kn., Lud.), skg.; 13. "Vanessa unicae L. (Kn., H. M.), do. Heinsius saw 2 long-tongued bees in HollandâAnthophora pilipes F. t, and Bombus terrester L. 5 (Bot. Jaarb. Dodonaea, Ghent, iv, 1892, p. 79). 2504. D. striata Tratt. (Herm. Muller, ' Alpenblumen,' pp. 207-9 ; Schulz, ' Beitrage,' II, pp. 160-1.)âThis species bears homogamous lepido- pterid flowers smelling like elder. Their mechanism agrees with that of the preceding species, but the corolla-tube is so long and narrow that only Lepidoptera can obtain the nectar and effect pollination. Autogamy is possible by fall of pollen. Visitors.âHerm. Muller ob- served numerous Lepidoptera (9 species), and A. Schulz similarly. 2505. D. Laureola L. (Mac- Leod, ' Pyreneenbl.,' p. 440 ; Midge- ville, Bull. soc. bot., Paris, xxxv, 1887.)âMi^geville describes small fertile and large sterile flowers for this species as for D. Mezereum. They are yellowish in colour and belong to class L. Visitors.âMacLeod saw a Lepidopterid in the Pyrenees, and Bonnier noticed the honey-bee. 2506. D. Cneorum L. (Briquet, ' £tudes de biol, flor. dans les Alpes Occi- dent.')âBriquet says that the red, fragrant flowers of this species are frequently visited by butterflies. The diameter of the perianth limb is 10-20 mm. The perianth tube narrows upwards, and the epiphyllous anthers are in two whorls, one 3-4 mm. above the other, while the capitate stigm
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