Dendroceros

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Dendroceros
Dendroceros.jpg
Dendroceros sp. Nees
growing on the bark of a tree
Scientific classification e
Kingdom: Plantae
Division: Anthocerotophyta
Class: Anthocerotopsida
Order: Dendrocerotales
Family: Dendrocerotaceae
Genus: Dendroceros
Nees in Gottsche, Lindenb. & Nees[1]
Species

See text.

Dendroceros is a genus of hornworts in the family Dendrocerotaceae.[2] The genus contains about 51 species native to tropical and sub-tropical regions of the world.

Description[edit]

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.

Habitat[edit]

Dendroceros grows on humid ground, rocky outcrops, and on the sides of trees. Its name literally means "tree horn".

References[edit]

  1. ^ Gottsche, C.M.; Lindenberg, J.B.G.; Nees von Esenbeck, C.G. (1846). Synopsis Hepaticarum. p. 579. 
  2. ^ 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

External links[edit]