358 



ANGIOSPERMAEDICOTYLEDONES 



I 



Pig. 359. Daphne striata, L. (after Herm. Mailer). 

 E. Flower in longitudinal section ; , nectary. F. Flower 

 from above. 



5. Bombus hortorum L. 2, skg. (Kn.) ; 6. Halictus cylindricus F. 5 (Kn., H. M.) ; 

 7. H. leucopus K. $ (H, M.) ; 8. H. minutissimus ^. $ ; 9. H. nitidus Schenck 5 ; 

 all skg.; 10. Osmia fusca Chr. S (H. M.) ; 11. O. rufa Z. 5 and S (H. M.), skg. 

 C. Lepidoptera. Rhopalocera \ 12. Rhodocera rhamni Z. (Kn., Lud.), skg.; 

 13. Vanessa urticae Z. (Kn., H. M.), do. 



Heinsius saw 2 long-tongued bees in Holland Anthophora pilipes F. J, and 

 Bombus terrester Z. $ (Bot. Jaarb. Dodonaea, Ghent, iv, 1892, p. 79). 



2504. D. striata Tratt. (Herm. Miiller, ' Alpenblumen,' pp. 207-9 ; Schulz, 



' Beitrage,' II, pp. 160-1.) This 

 species bears homogamous lepido- 

 pterid flowers smelling like elder. 

 Their mechanism agrees with that] 

 of the preceding species, but thefl 

 corolla-tube is so long and narrow] 

 that only Lepidoptera can obtain j 

 the nectar and effect pollination.] 

 Autogamy is possible by fall of 

 pollen. 



Visitors. Herm. Miiller ob-^| 

 served numerous Lepidoptera (9 

 species), and A. Schulz similarly. 



3505. D. Laureola L. (Mac- 

 Leod, ' Pyrenegnbl.,' p. 440 ; Mi^ge- 

 ville, Bull. soc. bot., Paris, xxxv, 1887.) Mi^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. MacLeod saw a Lepidopterid in the Pyrenees, and Bonnier noticed 

 the honey-bee. 



2506. D. Cneorum L. (Briquet, ' Etudes de biol. flor. dans les Alpes Occi- 

 dent.') Briquet 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 stigma is placed about 4 mm. deeper than the 

 lower whorl. The lower part of the inner wall of the perianth tube secretes small 

 drops of a sweet fluid. Butterflies effect cross- and self-pollination, and pollen can | 

 fall automatically upon the stigma of upright flowers. Kirchner adds that plants 

 from Tuttlingen ( Wflrtemberg) and Mount Salvatore (near Lugano) possessed a dark- 

 green glandular disk at the base of the ovary, which secretes nectar as in D. Mezereum 

 and D. striata. 



Visitors. Vide supra. 



2507. D. alpina L. (Briquet, op. cit.) Briquet states that the four periani 

 lobes of the milk-white flowers belonging to this species diverge to give them a dia- 

 meter of about 10 mm. In the perianth tube the eight anthers are situated in two 

 whorls about i-i^ mm. apart, and the capitate stigma is placed somewhat more 



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