. The essentials of botany. Botany. PllANEBOaAMIA. 247 of the same species, the pollen-masses are thrust against the sticky stigma {st) and all or a part adheres to it. Thus, as the insect passes from flower to flower, it unconsciously pollinates them, always, however, carrying the pollen of one flower to the stigma of some other. 521. The Lady's Slippers are examples of Orchids with. Fig. 138—An Orchid-flower (Orchis mascula). A, vertical section of a flower- bud (magnified) before it has twisted upon its ovary, /; gs, the column, bearing a pollen-mass. p2; h, its stickydisc, below which is t
. The essentials of botany. Botany. PllANEBOaAMIA. 247 of the same species, the pollen-masses are thrust against the sticky stigma {st) and all or a part adheres to it. Thus, as the insect passes from flower to flower, it unconsciously pollinates them, always, however, carrying the pollen of one flower to the stigma of some other. 521. The Lady's Slippers are examples of Orchids with. Fig. 138—An Orchid-flower (Orchis mascula). A, vertical section of a flower- bud (magnified) before it has twisted upon its ovary, /; gs, the column, bearing a pollen-mass. p2; h, its stickydisc, below which is the stigma. B, an open flower; /, its twisted ovaiy; I, lip; st, stigma; a, anther; h, its sticky disc; sp, spur. two anthers; these are upon the sides of the curved column which bears the stigma higher up. The lip is here shaped like a slipper (whence the common name), into the opening of which the column bends. The lip and the other parts of the perianth are colored, often showing striking con- trasts, and these doubtless serve to attract the notice of insects. When an insect enters the slippe/* (Up), it does so. 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt and company, ;
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
