288 ANGIOSPERMAE—DICOTYLEDONES 



Visitors. — These are rare. The following were recorded by the observers, and 

 for the localities stated. — 



Herm. Miiller, 2 bees — Anthophora pilipes F. S and 5, skg., and Melecta armata 

 Pz., skg. Knuth, on one occasion, the humble-bee Bombus hortorum L. 5, skg. 

 Hoppner (Bremen), 6 bees— i. Apis mellifica Z. 5 ; 2. Bombus agrorum F. 5; 

 3. B. muscorum /^ 5; 4. B. sylvarum Z. 5; 5. B. terrester Z. j; 6. Halictus sp. 



2316. L. incisum Willd. (=L. dissectum With., L. hybridum VilL, L. guest- 

 falicum Weihe, and, according to the Index Kewensis, L. purpureum Z.). (Herm. 

 MuUer, 'Fertilisation,' p. 498; MacLeod, Bot. Jaarb. Dodonaea, Ghent, v, 1893, 



P- 37°-)- 



VisiTORS. — Herm. Miiller observed 5 bees — i. Anthophora pilipes F. 5 and S, 

 skg.; 2. Apis mellifica Z. J, do.; 3. Bombus pratorum Z. 5, do.; 4. B. rajellus 

 K. 5, do. ; 5. Halictus cylindricus F. 5, vainly skg. 



2317. L. Orvala L. (Loew, Ber. D. bot. Ges., Berlin, iv, i886, pp. 119-20, 

 ' Bliitenbiol. Floristik,' p. 311.) — This species, indigenous to South Europe, Steiermark, 

 and Carniola, has been studied by Loew in the Berlin Botanic Garden. The large,^ 

 brown-purple flowers are over 30 mm. long, and the corolla-tube about 1 5 mm. in 

 length, expands into a sort of pouch (16 mm. long and 3 mm. broad) marked with 

 dark longitudinal lines. It is provided with several lateral teeth, which probably 

 serve as holdfasts for visitors; the lower lip is joined to the pouch as a sort of 

 appendage. The stigmatic branches are situated in front of the glabrous anthers, 

 which mature simultaneously, being therefore first touched by a humble-bee visitor 

 and dusted with pollen. The corolla-tube is so greatly expanded that a humble-bee 

 can insert its head and the front part of its thorax; a proboscis 15 mm. long can 

 therefore suck all the nectar. This is secreted by a nectary greatly enlarged in front, 

 and protected by a circlet of hairs. 



Visitors. — Loew saw the humble-bee Bombus hortorum Z., skg. legitimately, 

 and the honey-bee, vainly skg. 



2318. L. garganicum L. (Loew, Ber. D. bot. Ges., Berlin, iv, 1886, pp. 120-1.) 

 — Loew states that the flower mechanism of this species resembles that of L. Orvala, 

 but the pouch-like enlargement of the corolla-tube is much smaller, and the circlet of 

 hairs is almost or entirely absent. The stigma is situated between the anthers, while 

 the lower stigmatic branch projects below them. 



Visitors. — Loew observed 7 bees in the Berlin Botanic Garden — i. Anthidium 

 manicatum Z. J, skg. ; 2. Anthophora pilipes F. J and 5, do., the front of its head 

 dusted with pollen ; 3. Apis mellifica Z. t^, vainly skg., its head and thorax dusted 

 with pollen; 4. Bombus hortorum Z. 5, skg., then going to L. Orvala; 5. B. pra- 

 torum Z. 5, po-cltg. ; 6. Halictus sexnotatus K. 5, do.; 7. Osmia aenea Z. 5, 

 creeping far into the flowers and skg. 



2319. L. flexuosum Tenore. — 



Visitors. — Loew observed 6 bees in the Berlin Botanic Garden. — 



I. Anthidium manicatum Z. 5 skg., J swarming round the flowers; 2. Apis- 

 mellifica Z. 5, vainly skg., its head and thorax dusted with pollen; 3. Bombus 

 hortorum Z. 5, skg. ; 4. Halictus sexnotatus K. 5, po-cltg. ; 5. Osmia aenea Z. 5, 

 do. ; 6. O. riifa Z. S, skg. 



2320. L. Galeobdolon Crantz ( = Galeobdolon luteum Huds., and Galeopsis 



