3i6 ANGIOSPERMAE—DICOTYLEDONES 



at first situated above the anthers and sinking down between them later on. Thus if 

 insect-visits fail, automatic self-pollination is easily effected. The nectary, which, as 

 in other species of this genus, is situated on the front of the ovary, is very strongly 

 developed, and the secretion of nectar therefore extremely abundant. (Cf. Fig. 

 342, C.) 



Schulz observed perforation by humble-bees. — 



Visitors. — Schletterer gives the following list for Pola. — 



Hymenoptera. (a) Apidae: i. Anthidium septemdentatum Z/r. ; 2. Andrena 

 carbonaria L. ; 3. A. convexiuscula K., var. fuscata K. ; 4. A. flavipes Pz. ; 5. A. 

 parvula .ST. ; 6. A. thoracica F.; 7. Ceratina cucurbitina iJcwz'; 8. Eucera inter- 

 rupta Baer.; 9. E. longicornis Z. ; 10. Halictus calceatus i'co/. ; 11. H. quadri- 

 cinctus F.; 12. H. scabiosae Rossi; 13. H. tetrazonius Klg.; 14. Megachile 

 (Chahcodoma) manicata Gzr. ; 15. M. (C.) muraria y?^/2. ; 16. Osmia caerulescens 

 Z.; 17. O. emaiginata Zf/i. ; 18. O. versicolor Z/r. ; 19. Podalirius acervorum Z. ; 

 20. P. crinipes Sm.; 21. P. retusus Z., var. meridionalis Per.; 22. P. tarsatus Spin, 

 (b) Tenthredinidae : 23. Athalia rosae Z., var. cordata Z^/>. ; 24. A. spinarum i^. 



Herm. Miiller (Alps) saw 3 humble-bees and 2 Lepidoptera ; Friese (Thuringia), 

 2 bees — Andrena carbonaria Z., and Osmia andrenoides Spin. 



2379. A. Chamaepitys Schreb. — 



Visitors. — Schletterer observed 4 bees at Pola. — Three po-cltg. species — 



I. Anthidium manicatum Z. ; 2. A. oblongatum Ltr.; 3. Osmia andrenoides 

 Spin. ; and the parasitic form — 4. Pasites maculatus Jur. 



736. Teucrium L. 



Protandrous bee flowers, apparently without an upper hp, this being deeply 

 bifid, and the halves united to the margin of the lower lip. There is no circlet of 

 hairs in the corolla-tube. Kerner describes the middle lobe of the lower lip as 

 arching over the anthers and stigma in the bud like a hollow hemisphere, and then 

 curving downwards when the flower opens. Nectar secreted and concealed as usual. 

 Sometimes gynomonoecism. 



2380. T. Scorodonia L. (Delpino, 'Ult. oss.'; Herm. MuUer, ' Fertilisation,' 

 pp. 499-500, 'Weit. Beob.' Ill, p. 44; Kirchner, 'Flora v. Stuttgart,' pp. 637-8; 

 Schulz, 'Beitrage,' II, p. 222; MacLeod, Bot. Centralbl., Cassel, xxiii, 1885, Bot. 

 Jaaib. Dodonaea, Ghent, v, 1893, pp. 379-81 ; Knuth, ' Bloemenbiol. Bijdragen.') — 

 The greenish-yellow flowers of this species are arranged in terminal and axillary 

 unilateral racemes. The corolla-tube is 9-10 mm. long, its lower part often being 

 filled with nectar to a height of 4 mm. At the beginning of anthesis the stamens — 

 which lie against the back of the upper part of the corolla-tube — project straight out 

 of the flower, together with the style, the stigmatic branches having already slightly 

 diverged. The latter, however, are still behind the anthers, so that in the first stage 

 of anthesis the head of a bee probing for nectar touches only the anthers. The 

 stamens then bend upwards, and finally backwards and downwards, while the style 

 curves forwards, its branches, which now diverge more widely, assuming the position 

 previously occupied by the anthers. 



When the lower flowers of an inflorescence are in the second (female) stage, the 



