. Notes on the life history of British flowering plants. Botany; Plant ecology. 400 BRITISH FLOWERING PLANTS CHA?. or rarely 2. There are also normally 3 stigmas, the upper and central one of which is modified into a re- markable organ known as the rostellum (Figs. 328, 331). The anther and stigmas are borne in close proximity on a prolongation of the floral axis known as the column. The stigma is sticky. The pollen is generally Upper or posterior sepal. Upper Labellum, Fig. 328.—Section of the flower of an Orchid. SS, stigmas ; Sr, stigma modified into the rostellnm ; A^, fertile anth
. Notes on the life history of British flowering plants. Botany; Plant ecology. 400 BRITISH FLOWERING PLANTS CHA?. or rarely 2. There are also normally 3 stigmas, the upper and central one of which is modified into a re- markable organ known as the rostellum (Figs. 328, 331). The anther and stigmas are borne in close proximity on a prolongation of the floral axis known as the column. The stigma is sticky. The pollen is generally Upper or posterior sepal. Upper Labellum, Fig. 328.—Section of the flower of an Orchid. SS, stigmas ; Sr, stigma modified into the rostellnm ; A^, fertile anther of the onter whorl; A^, A^, anthers of the same whorl sometimes present in the form of barren outgrowths (stamin- odes) of the column (as in Orchis), but generally absent ; a^, Oj, rudimentary anthers of the inner whorl fertile in Cypripedium, generally forming staminodial outgrowths of the column ; 1^3, third anther of the same whorl, normally sup- pressed, but occasionally present in abnormal ilowers. united by elastic threads, and forms one or two oblong or globular pollen masses. The flowers as a rule pro- duce nectar, often contained in a spur.^ In some cases (Orchis) the nectar does not transude, but the tissue must be bored to obtain the sweet juice. The flowers are very long-lived. Those of our wild orchids are said to retain their beauty often for a month, and some foreign ones for twice or even nearly three times as ^ In one species, Angroecum sesquipedale, of Madagascar, the spur reaches a length of 18 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 Lubbock, John, Sir, 1834-1913. London, New York, Macmillan and Co. , Ltd.
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