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Dendroceros
''Dendroceros'' is a genus of hornworts in the family Dendrocerotaceae.〔Renzaglia, Karen S. & Kevin C. Vaughn. (2000) "Anatomy, development and classification of hornworts", pages 1-20 ''in'' A. Jonathan Shaw & Bernard Goffinet (Eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press). ISBN 0-521-66097-1〕 The genus contains about 51 species native to tropical and sub-tropical regions of the world.
== Description ==
The gametophyte is yellowish-green and usually less than one-half cm wide. The thallus branches in a bifurcating pattern. In the subgenus ''Apoceros'', there are cavities in the central strand of the thallus. The edges of the thallus are only a single layer of cells thick and have an undulating margin. It is common to find symbiotic colonies of blue-green bacteria (usually ''Nostoc'') growing among the cells. Under a microscope, the epidermal cells have trigones.
The sporophyte is erect when mature, growing up to 5 cm tall. Like other hornworts, its surface has stomata. The interior of the sporophyte differentiates into a central column and a surrounding mass of spores and elater cells, with a distinct spiral. The spores are both green and relatively large with an ornamented surface.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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