. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ORCHIDEAE 401 marginata Mdrk. Scott-Elliot (Dumfriesshire), a hover-fly and a Lepidopterid ('Flora of Dumfriesshire,' p. 168). 2616. H. odoratissima Franch. (=G. odoratissima Rich., and Orchis odoratissima Z.). (Herm. Miiller, ' Alpenblumen,' pp. 65-6.)—The mechanism of the vanilla-scented, pale pink flowers of this species resembles that of the preceding one, but the spur is only 4-5 mm. long and about half filled with nectar. The pale colour and stronger f
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ORCHIDEAE 401 marginata Mdrk. Scott-Elliot (Dumfriesshire), a hover-fly and a Lepidopterid ('Flora of Dumfriesshire,' p. 168). 2616. H. odoratissima Franch. (=G. odoratissima Rich., and Orchis odoratissima Z.). (Herm. Miiller, ' Alpenblumen,' pp. 65-6.)—The mechanism of the vanilla-scented, pale pink flowers of this species resembles that of the preceding one, but the spur is only 4-5 mm. long and about half filled with nectar. The pale colour and stronger fragrance attract moths more particularly. Visitors.—Herm. Miiller observed 3 species of Lepidoptera. 2617. H. albida R. Br. (= Gymnadenia albida Rich., and Orchis albida Z.). (Darwin, op. cit., pp. 43, 68; Herm. Miiller, 'Alpenblumen,' p. 66.)—The white flowers of this species are fragrant (also in the arctic regions, according to Warming), and the entrance to the spur is so narrow that only a lepidopterid proboscis can enter it. The white colour of the flowers points to moths as visitors, and the shortness of the spur (2 mm.) indicates adaptation to small Fig. 369. Hahenaria albida, R. Br. (after Herm. Miiller). A. Flower, seen from the side. B. Do., from below. C, Do., from the front (x 7). o, opening of the spur; ov, ovary; pp, upper petals; p\ labellum ; s s, lateral sepals; ^, upper sepal; j/, spur : 5/, stigraatic surface. 2618. H. angustifolia H. B. et K. ( = Nigritella angustifolia Rich., Orchis nigra Scop., and Satyrium nigrum Z.). (Herm. MuUer, 'Alpenblumen,' pp. 66-9; Ricca, Atti Soc. ital. sc. nat., Milano, xiv, 1871; Kerner, 'Nat. Hist. PI.,' Eng. Ed. i, II, p. 201.)—The flowers of this species are dark purple-red, rarely pink in colour, with a strong vanilla odour, and the spur is only 2 mm. long and one mm. wide. The flower mechanism agrees otherwise with that of the remaining lepidopterid orchids, e. g. in regard to richness in nectar, and the
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