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In Bougainvillea, sunflower, and hibiscus, what is the insertion of anther? what is the ovary position

In Bougainvillea, sunflower, and hibiscus, what is the insertion of anther? what is the ovary position

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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In Bougainvillea, sunflower, and hibiscus, what is the insertion of anther? what is the ovary position?

The anther is described as sessile when the filament is wanting. According to attachment the anther is adnate when attached by its base and versatile when attached by a point near the middle. As to its position, the anther is introrse when it faces inward and extrorse when it faces outward. Usually, the anther has two cells, but in some the number may be 1, 3 or 4. The pollen in the cells are allowed to escape when the cells open by longitudinal slits, by valves, or by pores. As stated above, rudimentary, imperfect or sterile stamens are called staminodes.
Transcribed Image Text:The anther is described as sessile when the filament is wanting. According to attachment the anther is adnate when attached by its base and versatile when attached by a point near the middle. As to its position, the anther is introrse when it faces inward and extrorse when it faces outward. Usually, the anther has two cells, but in some the number may be 1, 3 or 4. The pollen in the cells are allowed to escape when the cells open by longitudinal slits, by valves, or by pores. As stated above, rudimentary, imperfect or sterile stamens are called staminodes.
In some carpels or pistils the style is frequently wanting, the stigma then being called sessile. Pistils are stipitate if stalked and sessile if without a stalk. The ovary is inferior when the other floral organs i.e, the perianth and the stamens appear as though they were inserted on the top of the ovary (epigynous); superior when it is inserted on the receptacle and free from the other floral organs which are also inserted on the receptacle (hypogynous); and half-superlor or half-inferior when the other floral organs are inserted midway between the top and base of the ovary either on the calyx-tube or a hypanthium (perigynous). When the ovary is inferior the calyx (and corolla) is superior and when the ovary is superior the calyx (and corolla) is inferior.
Transcribed Image Text:In some carpels or pistils the style is frequently wanting, the stigma then being called sessile. Pistils are stipitate if stalked and sessile if without a stalk. The ovary is inferior when the other floral organs i.e, the perianth and the stamens appear as though they were inserted on the top of the ovary (epigynous); superior when it is inserted on the receptacle and free from the other floral organs which are also inserted on the receptacle (hypogynous); and half-superlor or half-inferior when the other floral organs are inserted midway between the top and base of the ovary either on the calyx-tube or a hypanthium (perigynous). When the ovary is inferior the calyx (and corolla) is superior and when the ovary is superior the calyx (and corolla) is inferior.
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