ROSACEA E 371 



Visitors. — Loew (Jahrb. Kgl. bot. Gart. zu Berlin, iv, 1886, p. 159) observed 

 a po-dvg. hover-fly (Eristalis sepulcralis L.) on cultivated plants in the Berlin Botanic 

 Garden. 



873. P. supina L. — This species agrees with P. Anserina as regards its flower 

 mechanism, and the occurrence of gynomonoecism and gynodioecism (Schulz, 

 'Beitrage,' II, p. 187). 



874. P. recta L. — Kemer states that the flowers of this species open between 

 1 1 and 1 2 o'clock in the morning, and that the petals fall off on the second day of 

 an thesis. 



875- P- grandiflora L. (Herm. Miiller, ' Alpenblumen,' 219-20.)— The flowers 

 of this species are even larger than those of P. aurea ; they are also borne on longer 

 stalks, which make them still more conspicuous. The number of insect visitors is 

 therefore greater. The flowers are protandrous, so that at first crossing is favoured, 

 and automatic self-pollination is rarer. 



Visitors. — Herm. Miiller observed i o Muscids, 4 Syrphids, 4 beetles, 1 2 bees, 

 and 13 Lepidopterids. 



876. P. vema L. — According to Hermann Muller ('Fertilisation,' pp. 231-2), 

 the flowers agree as regards mechanism with those of P. Anserina ; but their size is 

 less. They are of a brilliant yellow colour, and rich in nectar. Schulz describes 

 them as slightly protogynous. The inner anthers are situated above the stigmas, so 

 that automatic self-pollination regularly takes place. 



Visitors. — Schulz observed numerous flies, beetles, and small bees in Central 

 Germany ; and Lindman noticed flies, a beetle, and a butterfly on the Dovrefjeld. 



In the Alps Herm. Muller ('Alpenblumen,' p. 221) saw 17 Hymenopterids, 

 2 Dipterids, a beetle, and 2 Lepidopterids visiting this species, and with P. alpestris 

 Hall./., the large-flowered form of P. salisburgensis (cf p. 370). 



I noticed a bee (Andrena albicans Mull. 5), and a hover-fly (Eristalis tenax L.), 

 both skg., in Schleswig-Holstein (' Bloemenbiol. Bijdragen'). Herm. Miiller gives 

 the following Hst for Westphalia and Thuringia. — 



A. Coleoptera. (a) CurcuUonidae -. i. Spermophagus cardui Sttv. (b) Niti- 

 thdidae: 2. Meligethes freq., nect-lkg. B. Diptera. (a) Muscidae : 3. Onesia 

 cognata Mg., skg. ; 4. O. floralis R. D., do. ; 5. Pollenia vespillo F., do. (3) Stratio- 

 myidae: 6. Odontomyia argentata i^., skg. (c) Syrphidae : 7. Cheilosia modesta .£'^^., 

 skg.; 8. C. praecox Zeli., freq., skg.; 9. Rhingia rostrata Z., skg.; 10. Syritta 

 pipiens Z., do. ; 11. Syrphus sp., do. C. Hymenoptera. {a) Apidae: 12. hnArtnz. 

 albicans MiilL, 5 and 5, freq., po-cltg. and skg. ; 13. A. albicrus K. Z, skg. ; 14. A. 

 argentata Sm. S, do.; 15. A. dorsata K. 5, po-cltg.; 16. A. fulvicrus K. 5, skg.; 

 17. A. parvula K. 5, do.; 18. A. nana K. S, do.; 19. A. xanthura K. 5, do.; 20. 

 Apis mellifica Z. 5, po-cltg. and skg.; 21. Bombus terrester Z. 5, po-cltg.; 22. 

 Halictus albipes F. 5, skg.; 23. H. cylindricus F. 5, po-cltg.; 24. H. flavipes F. 

 J, skg. ; 25. H. leucopus K. 5, skg. and po-cltg.; 26. H. maculatus Sm. 5, po-cltg.; 

 27. H. morio F. $, skg.; 28. H. nitidiusculus K. 5, do.; 29. H. semipunctulatus 

 Schenck 5, do.; 30. H. sexstrigatus Schenck 5, po-cltg. ; 31. Nomada ruficornis Z. S; 

 32. Osmia fusca C^r. 5, skg. and po-cltg. \V) Formuidae: 33. Formica praten- 

 sis Deg. 5, nect-lkg. 



1! b 2 



