Dendroceros

Dendroceros
Dendroceros
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.

Contents

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.

Habitat

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

References

  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


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Dendroceros — Saltar a navegación, búsqueda ? Dendroceros Clasificación científica Reino: Plantae División …   Wikipedia Español

  • Hornwort — This is an article about the non vascular plants. The name Hornwort is also often applied to an aquatic plant Ceratophyllum demersum in the family Ceratophyllaceae Taxobox fossil range = fossil range|90Upper Cretaceous (but see text) to recent… …   Wikipedia

  • Антоцеротовидные — Phaeoceros laevis [syn …   Википедия

  • ANTHOCÉROTALES — Les Anthocérotales (du grec 見益礼﨟: fleur, et 﨎福見﨟: corne, par allusion à la forme des capsules) sont des végétaux appartenant à l’embranchement des Bryophytes. Toujours de petite taille, elles se composent d’un gamétophyte et d’un sporophyte bien… …   Encyclopédie Universelle

  • Dendrocerotaceae — Dendroceros sp. growing on the bark of a tree Scientific classification …   Wikipedia

  • Гаметофит1 —         Сравнительно тонкие слоевища антоцеротовых, диаметром 1 3 см, имеют розетковидную или (реже) лентовидную форму и различаются между собой главным образом степенью изрезанности (или волнистости) краев. Своеобразный облик придают им довольно …   Биологическая энциклопедия

  • Систематический обзор и распространение —         В классе антоцеротовых выделяются либо одно семейство антоцеротовых (Anthocerotaсеае), либо два семейства: антоцеротовые и нототиласовые (Notothylaceae) с одним, и, как выше показано, своеобразным родом нототилас (Notothylas). Почти всеми …   Биологическая энциклопедия

  • Megaceros (botany) — Taxobox name = Megaceros image width = 240px image caption = Megaceros vincentianus from a South Brazilian rain forest; Spores pressed out of the sporophyte. regnum = Plantae divisio = Anthocerotophyta classis = Anthocerotopsida ordo =… …   Wikipedia

  • Megaceros — For the prehistoric deer, see Megaloceros. Megaceros Scientific classification Kingdom: Plantae Division …   Wikipedia

  • Anthocerotales — Hornmoose Glattes Hornmoos (Phaeoceros laevis) Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”