. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. PRIMULACEAE 73 1819. P. farinosa L. (Darwin,'Forms of Flowers,'pp. 45, 224, 273 ; Herm. Muller, ' Alpenblumen,' pp. 363-7 ; MacLeod,' Pyreneenbl.,' p. 372.)âThis species bears dimorphous heterostylous butterfly or humble-bee flowers. It is of particular interest because in the Alps, where Lepidoptera abound, it is adapted to butterflies, while in North Pomerania, where Lepidoptera are relatively few and bees abundant, it is adapted to the latter. Herm. Miill
. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. PRIMULACEAE 73 1819. P. farinosa L. (Darwin,'Forms of Flowers,'pp. 45, 224, 273 ; Herm. Muller, ' Alpenblumen,' pp. 363-7 ; MacLeod,' Pyreneenbl.,' p. 372.)âThis species bears dimorphous heterostylous butterfly or humble-bee flowers. It is of particular interest because in the Alps, where Lepidoptera abound, it is adapted to butterflies, while in North Pomerania, where Lepidoptera are relatively few and bees abundant, it is adapted to the latter. Herm. Miiller gives the following differences between flowers from the two regions.^(i) Alpine plants bear flowers which are usually larger and more brightly coloured than in Pomerania. (2) In Pomeranian plants, on the other hand, the corolla-lobes are on the average somewhat broader. (3) In Pomeranian plants, as a rule, the opening of the corolla and its tube are markedly wider. (Cf. Fig. 245.) In Greenland, according to Abro- meit ('Bot. Ergeb. von Drygalski's Gronlandsexped.,' pp. 39-40), the var. mislassinica (Mchx.) Pax occupies a middle position between P. farinosa, var. typica, and P. stricta Hornem. The flowers are homostylous, an oeco- logical peculiarity shared with Meny- antlies trifoliata in the same country, for the European type-forms of both plants are heterostylous. Visitors.âHerm. Muller ob- served 42 Lepidoptera, 3 Bombyliids, 2 Syrphids, a humble-bee, and a wasp in the Alps. MacLeod saw 2 Lepi- doptera, and a Bombyliid in the Pyrenees. 1820. P. minima L. (Herm. Muller,'Alpenblumen,' p. 369; Schulz, ' Beitrage,'II, pp. 148, 223; Kerner, ' Nat. Hist. PI.,' Eng. Ed. i, II, p. 396.)âThis species bears dimorphous heterostylous butterfly flowers. The tube of the rose-red corolla is lined with hairs, and is 10-12 mm. long with a contracted opening, so that only the proboscis of a lepidopterous insect can conveniently reach the base of the flower. Kerner says that automatic
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