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

Abrodictyum obscurum

(Abrodictyum obscurum)

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Description

Abrodictyum obscurum is a fern of the family Hymenophyllaceae. This species has a very short rhizome, robust, covered with a very abundant brown hair. The petiole of the fronds is long: it is more than six inches long, about the size of the blade. The sliver of the fronds, oblong subdeltoid, is divided at least three times and may exceed fifteen centimeters long and less than ten centimeters wide. The membrane of the limb is quite small. The sori are quite small and irregularly placed on the lower limb, mostly at the apex of the limb, at the base of the segments. They are 1.5 to 2 mm long and 0.5 mm wide. The style of the sori extends more than twice the length of the campanulate industry. The species, like those of the genus, has 33 pairs of chromosomes.

Taxonomic tree:

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