sporogonium
Americannoun
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sporogonia
plural
noun
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Origin of sporogonium
Example Sentences
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In the fern, however, the sporogonium becomes entirely independent of the sexual plant, and does not produce spores until it has reached a large size, living many years.
From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Douglas Houghton Campbell
G, young sporogonium still surrounded by the much enlarged base of the archegonium. h, neck of the archegonium. ar. abortive archegonia, × 12.
From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Douglas Houghton Campbell
The sporogonium even in the simplest forms has a sterile foot, but in this series also the origin of elaters from sterile cells can be traced.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various
The perianth serves also to enclose and protect the sporogonium during its development.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various
Procumbent, irregularly branched or subpinnate; leaves semi-vertical, subsquarrose, obliquely cordate, the lower lobe expanded; underleaves ovate, acutely bifid, the upper margin angular-dentate or entire; sporogonium unknown.—On trees and rocks, chiefly in mountain regions.
From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Asa Gray
Parallel with the evolution of the gametophyte in form and structure, a progression can be traced in the sporogonium, although the simplest sporogonia available for study may owe much of their simplicity to reduction.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various
The protonema is usually filamentous, and in some of the simplest forms is long-lived, while the small plants borne on it serve mainly to protect the sexual organs and sporogonia.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various
Kantia, Calypogeia and Saccogyna are British forms, which have their sporogonia protected in this way.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various
Other adaptations concern the protection of the sexual organs and sporogonia, and the retention of water in the neighbourhood of the archegonia to enable the spermatozoid to reach the ovum.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various
The plant bears three mature sporogonia which show the elongation of the seta.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various
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