. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ROSACEAE 375 895. P. hirta Vill — Visitors.—Schletterer observed the following Hymenoptera at Pola.— {a) Apidae: i. Andrena lucens/toA. ; 2. A. thoracica Z'.; 3. Halictus fasciatellus Schenck; 4. H. villosulus K.; 5. Prosopis clypearis Schenck. (I)) Tenthredinidae : 6. Amasis laeta F. 896. P. delphinensis Gren. et Godr., and 897. P. Kurdica Boiss. et Hohen.— Visitors.—Loew saw Apis, skg. and po-cltg., in the Berlin Botanic Garden. 898. P. chrysantha Trevir.—
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ROSACEAE 375 895. P. hirta Vill — Visitors.—Schletterer observed the following Hymenoptera at Pola.— {a) Apidae: i. Andrena lucens/toA. ; 2. A. thoracica Z'.; 3. Halictus fasciatellus Schenck; 4. H. villosulus K.; 5. Prosopis clypearis Schenck. (I)) Tenthredinidae : 6. Amasis laeta F. 896. P. delphinensis Gren. et Godr., and 897. P. Kurdica Boiss. et Hohen.— Visitors.—Loew saw Apis, skg. and po-cltg., in the Berlin Botanic Garden. 898. P. chrysantha Trevir.— Visitors.—Loew observed the following in the Berlin Botanic Garden.— A. Diptera. Syrphidae: i. Eristalis nemorum Z.; 2. Syritta pipiens Z., po-dvg. B. Hymenoptera. Apidae: 3. Apis mellifica Z. 5, skg. and po-cltg. 899. P. Meyeri Boiss., var. Fenzlii Lehm.— Visitors.—Loew saw the bee Prosopis communis Nyl. 5, po-dvg., in the Berlin Botanic Garden. 252. Sibbaldia L. Homogamous greenish-yellow flowers, with exposed nectar secreted in the usual place. 900. S. procumbens L. (Herm. Miiller, ' Alpenblumen,' p. 222.)—In this species the exposed nectar is secreted by the broad fleshy disk which surrounds the ten carpels. It is eagerly visited by short-tongued insects (Muscids, ants, Ichneumonids), and these effect cross- and self-pollination. The possibility of automatic self-pollination seems to be excluded, for though the anthers mature simultaneously with the stigmas, they are so far from them that transfer of pollen cannot take place auto- gamously. Lindman, however, says that self- pollination is a much easier matter in plants of ^ ^ „.,, ,^. ^ _ * _ Fig. 116. Stbbaldta procumbens, L. the species growing in the Scandinavian High- (after Herm. Mailer). Flower seen , J ,Tr • 1 ^T- . ^ .. r directly from above {X 7). a anther: ak. lands. Warming makes the same statement for epicaiyx; *, sepal; «, nectary; a petal. Greenland. 253. Alchemilla L. Small, greeni
Size: 1608px × 1554px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheroxfor, bookyear1906
