LEGUMJNOSAE 307 



L. 2) succeeded in doing this without any special effort, at the same time effecting 

 cross-pollination. I observed the same species of humble-bee in the island of 

 Pellworm (4. 6. '93). 



Schletterer records two bees for the Tyrol : 1. Melecta luctuosa Scop. ; 2. Poda- 

 lirius tarsatus Spin. He observed the Ichneumonid Perithous mediator F. at Pola. 



Loew noticed the bee Megachile lagopoda L. 5, po-cltg. in the Harz district 

 (' Beitrage,' p. 52). 



Kerner states that a butterfly (Lycaena baetica L.) visits the flowers, the female 

 laying her eggs in the ovary (' Nat. Hist. PI.,' Eng. Ed. 1, II, p. 156). 



214. Glycyrrhiza Tourn. 



715. G. grandifiora Tausch. 



Visitors. Loew saw the honey-bee, skg., in the Berlin Botanic Garden. 



215. Tephrosia Pers. 



716. T. heterantha Griseb. Hieronymus states that this species produces 

 cleistogamous flowers (Jahresber. Ges. vaterl. Cultur, Breslau, 1897). 



216. Robinia L. 



White or reddish nectar-yielding bee flowers ; with brush arrangement. 



717. R. Pseud-acacia L. (Kirchner, Flora v. Stuttgart,' pp. 495-6 ; Knuth, 

 ' Bloemenbiol. Bijdragen.') The odorous white flowers of this species are arranged 

 in large pendulous racemes. The 



vexillum has a green nectar-guide. 

 Kirchner states that the upper edges 

 of the carinal petals are closely ap- 

 posed : there is the usual posterior 

 hollow for union with the alae. 



The carina, alae, and sexual column . FlG - 99- Robinia Pseud-acacia, L. (From nature.) 1. The 



pistil seen from the side. 2. Stigma (s) seen from above. 



are mainly held together by the (Enlarged.) 

 vexillum, the lower part of which 



grasps all of them by means of two well-developed elastic lobes. The posterior pro- 

 cesses of the alar laminae also surround the sexual column, so long as the alae are 

 gripped by the vexillum, for the alar claws are twisted outwards at the back, thus 

 pressing the laminae inwards and downwards. The anthers dehisce before the flower 

 opens; pollen collects among the hairs of the stylar brush, but protective bristles 

 prevent it from reaching the stigma. The perpendicular style is 6 mm. long, and the 

 terminal capitate stigma is surrounded by a circlet of protective bristles directed 

 obliquely upwards. Below these comes a hairless region about \ mm. long, while 

 the part underneath this carries a brush of collecting-hairs crowded together ex- 

 ternally into a tract about \ mm. long, more loosely arranged internally, and stretching 

 over a distance of from i| to 2 mm. (see Fig. 99). I was able to satisfy myself 

 that the stigma remains sticky and receptive long after the anthers dehisce and 

 the pollen has been removed. 



x 2 



