. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ORCHIDEAE 417 When the insect visits a somewhat older flower, in which the labellum has moved away a little from the column, the pollinia are brought into contact with the Fig. 386. Goodyera repens, R. Br. {Sifter Herm. MiiUeT). ^. Flower, seen from the side. B. Do., after removal of the two lateral sepals and the glandular hairs. C. Inner surface of the upper sepal. Z7. Exterior of the right petal. E. Reproductive organs and labellum, in their natu
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ORCHIDEAE 417 When the insect visits a somewhat older flower, in which the labellum has moved away a little from the column, the pollinia are brought into contact with the Fig. 386. Goodyera repens, R. Br. {Sifter Herm. MiiUeT). ^. Flower, seen from the side. B. Do., after removal of the two lateral sepals and the glandular hairs. C. Inner surface of the upper sepal. Z7. Exterior of the right petal. E. Reproductive organs and labellum, in their natural position, seen from the side. .F. Reproductive organs, after removal of the pollinia and mucilage (X 7). G. Stigma and rostellum, seen from below. If. Lateral view of the reproductive organs ( X 24). /. Pollinia with mucilage, seen from below (X 35). a, anther; a\ vestigial do.; co, corolla: tz, nectar receptacle; ov, ovary; />, lateral petals ; fi\ labellum ; pOt poUinium ; r, rostellum; s, lateral sepals; s\ upper sepal; si^ stigma. Visitors.—So far only humble-bees have been observed, e. g. Bombus pra- torum Z., by R. B. Thompson (North Scotland), and B. mastrucatus Gerst., by Herm. MiiUer (Alps). The latter is inclined to think, however, that the true pollinators are small short-tongued insects, to which the structure of the flowers is adapted. 832. Corallorrhiza Hall. Nectar concealed. 2648. C. innata R. Br. (=Ophrys Corallorrhiza Z.). (Herm. MiiUer, 'Alpen- blumen,' pp. 77-8.)—-The flowers of this species are greenish-yellow in colour with a white labellum, and are dotted with dark-red in the throat. It may be concluded from their small size that they are visited by small insects, which use the anterior downwardly bent part of the labellum as an alighting-platform, and creep thence to the nectar secreted and concealed at the steeply downwardly bent base of this organ. In doing so they strike against the projecting rostellum, remove the clinging pollinia on thei
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