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calyptra

calyptra A protective cap- or hood-like covering on the developing capsule in a moss or liverwort. In mosses the calyptra usually remains until the capsule is almost ripe, when it usually falls. In liverworts the calyptra covers the capsule only very early in its development; later it may be visible as a collar at the base of the stalk.

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"calyptra." A Dictionary of Plant Sciences. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"calyptra." A Dictionary of Plant Sciences. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/calyptra

"calyptra." A Dictionary of Plant Sciences. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/calyptra

calyptra

calyptra
1. A layer of cells that covers the developing sporophyte of mosses, liverworts, clubmosses, horsetails, and ferns. In mosses it forms a hood over the capsule and in liverworts it forms a sheath at the base of the capsule stalk.

2. See root cap.

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"calyptra." A Dictionary of Biology. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"calyptra." A Dictionary of Biology. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/calyptra-0

"calyptra." A Dictionary of Biology. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/calyptra-0