Handbook of Flower Pollination Based Upon Hermann Müller's Work ʻthe Fertilisation of Flowers By Insectsʾ
Handbook of Flower Pollination Based Upon Hermann Müller's Work ʻthe Fertilisation of Flowers By Insectsʾ
Knuth, Paul Erich Otto Wilhelm, 1854-1899
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and po-cl^. (H. M.); 16. B. terrester Z. j, skg. (H. M.). Herm. Mailer saw 2 humble-bees in the Alps (* Alpenblumen,' p. 227). Gerstacker observed Osmia bicolor Schr. ?, po-cltg., at Berlin. Digitized by LjOOQIC 362 ANGIOSPERMAE—DICOTYLEDONES In Dumfriesshire 2 humble-bees and a hover-fly (very common) virere recorded (Scott-EUiot, ' Flora of Dumfriesshire/ p. 54). Schneider saw Bombus hypnorum Z. J and j in Arctic Norway (Mus. AarsL Troms0, xvii, 1895). 849. G. urbanum L. (Herm. Mailer, 'Ferti...lisation/ p. 230; Schulz, * Beitrage/ I, p. 34, II, p. 186 ; Knuth, 'Bl. u. Insekt a. d. nordfr. Ins./ p. 66,) — In the much smaller golden-yellow flowers of this species, according to Hermann MUller, nectar is secreted by a green fleshy -ring situated internal to the filaments. When the flower opens, the stamens are curved inwards, so that the anthers lie close to the outer carpels, while the inner stigmas are mature and project from the middle of the flower. The outermost stamens at once begin to curve outwards, their anthers dehisce, and turn their pollen-covered sides upwards ; the more central stamens then do the same.
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