. Elementary botany. Botany. Fig. 46S. Section of flower of cypripedium. stigma ; <(, at the left stamen. Tlie insect enters the labellum at the center, passes under and against the stigma, and out through the opening b, where it rubs against the pollen. In passing through another tiower this pollen is rubbed off on the stigma. must be deposited on the stigmatic end or margin in order that fertilization may take place. Fig. 467- 862. If we open carefully canna-flower buds Cypripedium. which are nearly ready to open naturally, by unv/rapping the folded petals and staminodia, we shall see the
. Elementary botany. Botany. Fig. 46S. Section of flower of cypripedium. stigma ; <(, at the left stamen. Tlie insect enters the labellum at the center, passes under and against the stigma, and out through the opening b, where it rubs against the pollen. In passing through another tiower this pollen is rubbed off on the stigma. must be deposited on the stigmatic end or margin in order that fertilization may take place. Fig. 467- 862. If we open carefully canna-flower buds Cypripedium. which are nearly ready to open naturally, by unv/rapping the folded petals and staminodia, we shall see the anlher-bearing. Fig. 469. Epipactis \\-ith portion of perianth removed to show details. /, labellum; st. stigma: ^, rostellum ; /, pollinium. When the insect approaches the flower its head strikes the disk of the pollinium and pulls the pollinium out. At this time the pollinium stands up out of the way of the stigma. By the time the insect mo\'es to another flower the pollinia have moved downward so tliat they are in position to strike the stigma and leave the pollen. At the right is the head of a bee, with two pollinia {a) 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 Atkinson, George Francis, 1854-1918. New York : H. Holt
Size: 2188px × 1142px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectbotany
