. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 34 ANGIOSPERMAE—DICOTYLEDONES 1756. A. alpina Spreng. (=Arbutus alpina L.). (Warming, 'Arkt. Vaxt. Biol.,' pp. 13-18.)—Tiiis species has so far been investigated in northern habitats, but not in alpine ones. The pendulous ovoid flowers are 5-6 mm. long, and arranged in short terminal racemes. Warming says that in Greenland they are either homogamous or feebly protogynous. In that country the plant blossoms very early in the neigh- bourhood of snow- and ice-f
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 34 ANGIOSPERMAE—DICOTYLEDONES 1756. A. alpina Spreng. (=Arbutus alpina L.). (Warming, 'Arkt. Vaxt. Biol.,' pp. 13-18.)—Tiiis species has so far been investigated in northern habitats, but not in alpine ones. The pendulous ovoid flowers are 5-6 mm. long, and arranged in short terminal racemes. Warming says that in Greenland they are either homogamous or feebly protogynous. In that country the plant blossoms very early in the neigh- bourhood of snow- and ice-fields, and sets fruit abundantly. There is a strong autogamous tendency, for .^\3 the pollen falls very easily on the large sticky stigma which lies below the anthers, and this is found to be dusted with it soon after the flower opens. The fall of pollen is checked, how- ever, by the narrow opening of the corolla and the hairs which line it. The appen- dages of the anthers are less well developed than in A. Uva-ursi, and in specimens from Greenland may be en- tirely absent. l^Cf. Fig. 220.) 520. Arbutus L. 1757. A. Unedo L. (Sprengel, 'Entd. Geh.,' pp. 240-1.)— Visitors. — Schletterer observed at Pola—i. The beautiful humble-bee Bombus argillaceus Scop., on fine days in November and December; 2. Bombus ter- rester Z., freq., in September, October, and November.— ' On sunny days when there was no wind it was also occasionally seen in January. I noticed it frequently during the Christmas season up to the end of January on the late blossoms of the strawberry-tree.' 1758. A. Andrachne L. (Entleutner, Ost. bot. Zs., Wien, xxxix, 1889.)— Visitors.— In some of the flowers of this species at Meran, Entleutner noticed small Muscids held fast by the tangled hairs, suffering the penalty of death for their greediness. He also mentions that some insects had ' bitten through the flower-urn close to the calyx.'. Fig. 230. Arciosiaphylos alpifia, Sprettg. (after E. Warming). A^
Size: 1494px × 1672px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheroxfor, bookyear1906
