452 ANGIOSPERMAE—MONOCOTYLEDONES 



take place, cross- and self-pollination being effected by small insects. The flower 

 closes when it fades, autogamy then taking place by contact of stigma and anthers. 

 Visitors. — Kirchner observed small flies. 



2751. S. sibirica Andr. (Harm. Muller, ' Weit. Beob.,' I, p. 279; Knuth, 

 ' Bloemenbiol. Bijdragen"; Warnstorf, Schr. natw. Ver., Wernigerode, xi, 1896.) — 

 Warnstorf describes the flowers of this species as protogynous. The three rows of 

 diverging stigmatic papillae are situated at the same level as the beautiful blue, 

 introrse anthers. The filaments are inserted into the middle of the backs of the 

 anthers. The pollen-grains are blue, opaque, irregularly ellipsoidal, up to 65 ^ long 

 and 30 /t broad. 



Visitors. — The following were recorded by the observers, and for the localities 

 stated. — 



Herm. Muller (Thuringia), the honey-bee, freq., skg. Knuth (Kiel Botanic 

 Garden, 29. 3. '94), the honey-bee Apis mellifica L. 5, and (21. 3-'96) the butterfly 

 Vanessa urticae Z., both freq., skg. Loew (Berlin Botanic Garden), the honey-bee, 

 boring for sap at the base of the ovary with the blades of its maxillae. Alfken 

 (Bremen), 8 bees — i. Andrena albicans Mull. J; 2. Bombus jonellus K. $; 

 3. B. lucorum Z. $ ; 4. B. pratorum Z. 5 ; 5. B. terrester Z. $ ; 6. Osmia cornuta 

 Lir. 5 ; 7. O. nifa Z. 5 and $ ; 8. Podalirius acervorum Z. S. Friese (Baden), the 

 bee Andrena gwynana K., very freq. 



2752. S. vema Huds. — 



Visitors. — MacLeod (Pyrenees) observed a bee and 3 flies (Bot. Jaarb. 

 Dodonaea, Ghent, iii, 1891, p. 306). 



2753. S. amoena L. (Sprengel, 'Entd. Geh.,' pp. 195-6.) — 



Visitors. — Loew (Berlin Botanic Garden) observed the honey-bee — Apis 

 mellifica Z. 5 — boring for sap with its maxillary blades in the base of the ovary. 



2754. S. cernua Hff^gg. — 

 Visitors. — As S. amoena. 



2755. S. hispanica Mill. ( = S. campanulata Ait.). — 



Visitors. — Loew (Berlin Botanic Garden) observed a hover -fly (Eristalis 

 arbustorum Z., po-dvg.), and the honey-bee, behaving as in S. amoena. 



2756. S. italica L. — 



Visitors. — Loew (Berlin Botanic Garden) observed a Muscid (Scatophaga 

 merdaria F., resting on the outside of the corolla), a hover-fly (Eristalis aeneus 

 Scop.), and the honey-bee, behaving as in S. amoena. 



2757. S. festalis Salisb. (=S. nutans Sm.). — 



Visitors. — Loew (Berlin Botanic Garden) observed 2 hover- flies, po-dvg. — 

 Eristalis nemorum Z., and Syritta pipiens Z. 



2758. S. patula DC. (=S. hispanica iJ////., according to the Index Kewensts). — 

 Visitors. — Loew (Berlin Botanic Garden) observed a humble-bee (Bombus 



hortorum Z. 5, apparently skg.), and a butterfly (Pieris brassicae Z.) clearly 

 inserting its proboscis into the base of the ovary. 



2759. S. tricolor Baker. — 



Visitors. — Loew (Berlin Botanic Garden) observed the honey-bee, boring for sap. 



