f 
- 
PART III. | THE MECHANISMS OF FLOWERS. 187 
102. TriroLiIuM RUBENS, L. (Thuringia, Rehmberg near 
_ Mublberg).—This species shows certain adaptations for Lepi- 
doptera as well as for bees; I have found it visited by six species 
_ of Bombus and Anthophora, and by seven species of Lepidoptera. 
103. TRIFOLIUM FILIFORME, L :— 
Visitors :—Apide ; (1) Apis mellifica, L. §,s. ; (2) Halictus albipes, F. 3, 
_s.; (3) H. cylindricus, F. 9, ¢.p. Lepidoptera: (4) Lyczna egon, s.v.s. 
104. TRIFOLIUM MEDIUM, L. :— 
Visitors: Apidw: (1) Andrena dorsata, K. 2, ¢.p. ; (2) Bombus agrorum, 
F. 9, sucking normally, Eleven additional visitors are recorded in No. 590, 11. 
105. TRIFOLIUM PROCUMBENS, L. :— 
Visitors: Apide: (1) Apis mellifica, L. §, s.; (2) Halictus flavipes, 
_K, 9,8. Five additional visitors are recorded in No. 590, 11. 
106. TRIFOLIUM MONTANUM, L.—I have found this species 
visited in Low Germany by four Apidz, one Sphegide, and four 
iF Lepidoptera (590, I1.); on the Alps by eight Apide and eight 
_ Lepidoptera (609). Besides the adaptations to bees usual in 
Papilionacee, it shows an adaptation to cross-fertilisation by 
_ Lepidoptera, the closely folded vexillum bringing the insect’s 
proboscis in contact with the stigma and anthers. 
Genistec. 
107. Lupinus LuTEus, L.—The flowers of Lupinus luteus, like 
_ those of Ononis spinosa, are devoid of honey and are provided 
_ with a piston apparatus; they present the following peculi- 
 arities:—The ale are coherent with one another at the an- 
__ terior border, and each possesses a lateral fold near its base, fitting 
_ into a depression in the carina. They surround the carina as in 
Lotus, but are flat instead of being strongly convex, and since the 
sides of the vexillum are bent backwards the flower is more con- 
" spicuous from the side than from the front. The division of labour 
which began to be marked in Ononis between the two whorls of 
stamens, one whorl producing the pollen, the other pressing it 
forwards, is much more complete in Lupinus (1, 2, Fig. 61). The 
anthers of the five outer stamens are much larger than those of 
the inner ; they dehisce within the bud, while the others are much 
shorter and very far from maturity (1, Fig. 61); and then after 
placing their pollen in the apex of the carina, they wither 
