. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 332 ANGIOSPERMA E~ DICOTYLEDONES the pollen clinging to them through the tip of the carina on to the ventral surfaces of bees. This pollen dusts the projecting stigma of the next flower visited, so that crossing is effected. Although the stigma is surrounded by the pollen of the same flower, automatic self-pollination apparently does not take place, the stigmatic papillae needing to be rubbed (by visiting bees) before they become receptive. Visitors.âI saw t
. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 332 ANGIOSPERMA E~ DICOTYLEDONES the pollen clinging to them through the tip of the carina on to the ventral surfaces of bees. This pollen dusts the projecting stigma of the next flower visited, so that crossing is effected. Although the stigma is surrounded by the pollen of the same flower, automatic self-pollination apparently does not take place, the stigmatic papillae needing to be rubbed (by visiting bees) before they become receptive. Visitors.âI saw the following bees in the North Frisian Islands. â i. Apis mellifica L. 5, skg.; 2. Bombus derhamellus K., do.; 3. B. terrester L., do.; and also B. agrorum F. 5, do. (Riigen).. 7 1 Fig. 108. Laihyrtis pratensis, L. (after Herm. Miiller). (i^ Flower seen from the side (slightly enlarged). (2) Fiower after removal of calyx and vexillum, seen from above (further enlarged). (3) Left ala, seen from within. (4) Flower after removal of vexillum and alae, seen from above. (5* Bud shortly before opening, after removal of calyx, vexillum, and alae; seen from the side. (6) The anterior part of the same, seen from above. (7) Style with brush and stigma, seen from the side. 18) The same, seen from within, a, alar sac, lying in a deeper pouch (a') of the carina; by process of alar margin, directed forward and downward: it interlocks with the narrowest part of (he pocket-like carinal sac; c, transverse depression in the ala, immediately behind the anterior dark yellow lobe, an angular ridge-like \'exillar fold (,0) is closely connected with it ; d^ posterior process of the upper alar margin ; f, alar claw; f, margin of the ala folded over; gg^ margins of the carina; h^ uppermost filament; 2, fused filaments; k, nectar passages, with basal nectaries: /, carinal claws; /«, place at which the tip of the style and the stigma project, when the carina is depressed ; «, leaf-like expansion
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