Pteridophytes (Spore Producing Plants: Ferns and More) • Earth.com

Treemoss Bristle Fern

(Didymoglossum kraussii)

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Description

Didymoglossum krausii is classified in the subgenus Didymoglossum . This species has the following characteristics: A long rhizome tracing, densely covered with brown to blackish hairs and without roots A sling formed of a limb cut out once or twice, rather irregularly lobed, about 4 cm long by 1.5 cm wide False veins parallel to the true veins but without false submarginal veins (characteristic of the subgenus) Some groups of dark or black hairs on the edge of the limbus A catadromatic rib. Solitary sounds at the extremities of the limb lobes A tubular indusia, the lips of which the cells are distinct from the tissues of the limbus, and whose border is often dark to black. This species is tetraploid: it counts 2 times 34 pairs of chromosomes that is 136 chromosomes

Taxonomic tree:

Domain:
Kingdom: Plantae
Phylum: Pteridophyta
Class: Polypodiopsida
Order:Hymenophyllales
Family:Hymenophyllaceae
Genus:Didymoglossum
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