. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 14. Nectar-guides, (i) Dotted marks of Saxifraga aspera L. (2) Ring-shaped nectar-guide of Myosotis alpestris Schmidt. (3) Spots and streaks of Gentiana acaulis L. (4) Streaks on tiie lower lip of Teucrium Chamaedrys L. (5) Streaks and ring-shaped nectar-guide of Veronica Chamaedrys. Delpino ('Ult. Oss., Atti Soc. ital. sc. nat.,' Milano, xvi, 1874, pp. 234 et seq.) distinguishes between intra-floral nectaries, occurring in the flower, and circum- flora
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 14. Nectar-guides, (i) Dotted marks of Saxifraga aspera L. (2) Ring-shaped nectar-guide of Myosotis alpestris Schmidt. (3) Spots and streaks of Gentiana acaulis L. (4) Streaks on tiie lower lip of Teucrium Chamaedrys L. (5) Streaks and ring-shaped nectar-guide of Veronica Chamaedrys. Delpino ('Ult. Oss., Atti Soc. ital. sc. nat.,' Milano, xvi, 1874, pp. 234 et seq.) distinguishes between intra-floral nectaries, occurring in the flower, and circum- floral nectaries on its outer side, as , in Euphorbia, where the honey is secreted by crescentic or rounded appendages of the cup-shaped involucre. There may also be extra-floral nectaries outside the flower altogether, but situated near it, as in the case of the above-mentioned (pp. 73-4) Marcgraviaceae, which investigations of Thomas Belt ('The Naturalist in Nicaragua,' 1874) made known to us. In this family nectar is secreted by bracts of striking form and colour by which the humming-birds that effect pollination are attracted. Besides these three kinds of nectaries occurring in the region of the flower, and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Knuth, Paul, 1854-1899; Knuth, Paul, 1854-1899; Mu?ller, Hermann, 1829-1883; Ainsworth Davis, J. R. (James Richard), 1861-1934. Oxford : Clarendon Press
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisheroxfor, bookyear1906
