. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 148 ANGIOSPERMAE—DICOTYLEDONES 369. P. Chamaebuxus L. (Hildebrand, op. cit.; Herm. MuUer, ' Alpen- blumen,' pp. 165-8.)—Kerner says that the flowers possess a plum-like odour. Their structure—which was first described by Hildebrand—bears a certain resem- blance to that of some Papilionaceae (Lotus). In both cases the stamens and style lie in the lower part of the horizontal flower, and bend upwards at the tip. Anthers and stigma occupy a laterally compressed
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 148 ANGIOSPERMAE—DICOTYLEDONES 369. P. Chamaebuxus L. (Hildebrand, op. cit.; Herm. MuUer, ' Alpen- blumen,' pp. 165-8.)—Kerner says that the flowers possess a plum-like odour. Their structure—which was first described by Hildebrand—bears a certain resem- blance to that of some Papilionaceae (Lotus). In both cases the stamens and style lie in the lower part of the horizontal flower, and bend upwards at the tip. Anthers and stigma occupy a laterally compressed chamber (carina), which is only open above, and this is pressed down by an insect visitor in such a way that not only are the anthers themselves pressed against its body, but also a part of the pollen discharged into the surrounding chamber before anthesis. At the same time the stigma is pressed against the under-surface of the visitor—which is probably a bee—. Fig. 42. Polygala Chamaebuxus^ L. (after Herm. Miiller). A. Flower seen from the side (natural size), B. Flower seen from the front (X 2j). C Flower after removal of the two petaloid sepals, seen from the side. D. The same, seen from above. E. The same, seen from below (x 3). F. The two petals of the leftside (X2j). (?. Bud, after removal of the sepals (= 5J). H. Mature flower in longi- tudinal section (X 5^). J. Base of flower after removal of the upper sepal, seen from above ( X 7). .?", upper sepal; j^, lateral sepal; j\ lower sepal; ^' lower petal; p- lateral petal; p^ upper petal; 5, spoon ; £, en- trance to the flower ; ^/, adhesive matter on the stigma; po^ pollen ; ov^ ovary ; gr^ style ; sch^ carina with hinge ^x), and perhaps first becomes receptive as a result of the friction. It would seem that either the pollen of the same flower is ineff'ective or the foreign pollen prepotent, cross-pollination being thus ensured. Visitors.—Herm. Mtiller—in the Alps—observed 5 humble-bees, in part s
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