LEGUMINOSAE 329 



775. V. Orobus DC. (=Ervum Orobus Kitt). 



Visitors MacLeod, in the Pyrenees, saw Bombus mastrucatus Gerst. 5, stealing 

 the nectar by perforation (Bot. Jaarb. Dodonaea, Ghent, iii, 1891, p. 439). 



In Dumfriesshire a humble-bee, probably Bombus agrorum F., was observed, 

 but did not appear to suck (Scott-Elliot, ' Flora of Dumfriesshire,' p. 50). 



776. V. Ervilia Willd. (=Ervum Ervilia Z., and Ervilia sativa Link). The 

 odourless white flowers of this species are marked with dark violet veins on the 

 vexillum, and a dark blotch on either side of the carina. Kirchner (' Flora v. 

 Stuttgart,' p. 507) describes the vexillum, which grasps the claws of the other petals 

 from above, as possessing two processes at the base of its lamina. These are closely 

 apposed to the parts of the flower beneath them. Each ala bears a finger-shaped 

 process, in front of which there is a deep fold interlocking with the carina. The 

 brush on the style is about half its length, and composed of uniform fine hairs. 



777. V. onobrychioides L. 1 



Visitors. Loew observed the following bees in the Berlin Botanic Garden. 

 1. Andrena dorsata K. 5, po-cltg. ; 2. Bombus agrorum F. 5, steadily skg. ; 

 3. Megachile willughbiella K. $, skg. ; 4. Osmia aenea Z. 5, po-cltg. 



778. V. unijuga A. Br. 



Visitors. Loew observed the following in the Berlin Botanic Garden. 



1. Bombus hortorum Z. jj(, skg. ; 2. B. lapidarius Z. g, do. ; 3. B. pratorum K. $f, 



do. ; 4. Megachile circumcincta K. 5, skg. and po-cltg. ; 5. M. willughbiella Z. 5, 



skg. ; 6. Osmia rufa Z. 5, po-cltg. 



228. Lens L. 



Nectar-yielding bee flowers with a stylar brush. 



779. L. esculenta Moench (=Ervum Lens Z.). The bluish-white flowers 

 of this species are marked with blue lines on the vexillum (nectar-guides), and 

 a small blue patch on the tip of the carina (pollen-guide). Kirchner (' Flora v. 

 Stuttgart/ p. 508) states that the vexillum, which but slightly ensheaths the other 

 parts of the flower, comes into close contact with the alae by means of two forwardly- 

 directed folds of a projecting ridge. The style bears collecting hairs only on its 

 inner side. Otherwise the mechanism agrees with that of Vicia Ervilia. Kerner 

 says that the flowers are fertile when insect-visits are prevented. 



Visitors. Herm. Miiller saw the honey-bee, skg., and a butterfly (Coe- 

 nonympha pamphilus Z.), do. ('Weit. Beob.,' II, p. 258). 



229. Pisum L. 



Nectar-containing bee flowers with a brush arrangement transitional to a 

 pumping one. 



780. P. sativum L. The mechanism of the white flowers of this species has 

 been very fully described by Herm. Miiller ('Fertilisation,' pp. 211-14). The strong 

 sickle-shaped carina is produced into a leaf-like outgrowth along the junction of 

 its two petals, and is thus strengthened. The alae and carina are very firmly united 

 with one another, and with the sexual column. At the base of each alar lamina 



