130 



ANGIOSPERMAE—DICOTYLEDONES 



324. R. odorata L. (Herm. MuUer, 'Fertilisation,' pp. 1 14-16, 'Weit.Beob.,' 

 II, p. 205; Knuth, 'Weit. Beob. ii. Bl. u. Insekt. a. d. nordfr. Ins.,' p. 231.) — The 

 flower mechanism agrees with that of the last species. The yellowish-white, odorous, 

 homogamous flowers attract numerous small bees, which collect pollen or suck 

 nectar, and effect pollination. Failing insect-visits, automatic self-pollination takes 

 place, and this is effective. 



Fig. 36. Reseda odorata, L- (after Hermann MQlIer'. (i) Flower before the anthers have dehisced, 

 seen from the front. (2) Flower after some of the anthers have dehisced, seen from the front. (3) Young 

 fruit, seen from the side. (4) Left upper petal. (.s) Left lateral petal. (6) Left lower petal, a, sepaJs; 

 3, petals ; r, expanded claws of the upper and lateral petals, which embrace the shield-shaped swelling (A) 

 of the receptacle ; d, undehisced stamens bent downwards ; e, dehiscing stamen raising itself; yi dehisced 

 and erect stamen ; ^, pistil ; k, shield-shaped projection of the receptacle ; :", nectary with nectar. 



Visitors. — Herman Miiller (H. M.) in Westphalia, and myself (Kn.) in Schleswig- 

 Holstein, observed the following. — 



A. Diptera. Syrphidae: i. Syritta pipiens Z., po-dvg. (H. M.). B. Hymeno- 

 ptera. {a) Apidae: 2. Andrena nigroaenea A'. 5, po-cltg. (H. M.) ; 3. Apis mellifica 

 L. 5, freq., skg. and po-cltg. (H. M., Kn.) ; 4. Halictus smeathmanellus K. 5, po-cltg. 

 (H. M.); 5. H. zonulus Sm.'^, po-cltg. (H. M.) ; 6. Prosopis annularis 6"^. 5 (= P. 

 panzeri Fdrst, according to Dalla Torre) (H. M.), 7. P. bipunctata F. 5 and S, freq. 

 (H. M.), 8. P. communis Nyl. 5 and S, very freq. (H. M.), 9. P. hyalinata F. 5 and S 

 (H. M.), and 10. P. pictipes Nyl (H.M.); all po-cltg. and skg. {b) Sphegidae: 



11. Cerceris rybiensis L. 5 and J, skg. and po-dvg. (H. M.). C. Lepidoptera. 



12. Pieris sp. (Kn.). D. Thysanoptera. 13. Thrips, very freq. (H.M.). 



