black sea red data book - Department of Biology

Phyllophora nervosa (P.C. Grev., 1830)
Synonyms: Fucus nervosus De Candolle, 1805; Phylophora rubens (Good. & Wood.)
Grev., F. nervosa Hauck, 1885; Phyllophora crispa (Huds.) Dixon.
Common names: Rom: Filofora; Russ: Fillofora; Turk: Filofora.
Taxonomic description. Thallus formed by brushes of 50 cm length. Base consists
of suckers or of a small foot (sole), provided with short, branched twigs (sprigs,
shoots) which often join and grow together, forming a thicker stratum. From the base
rise vertical suckers with a short stem (cylindrical at the base and flat on the upper
side). Stem passing over the lamellate site of the thallus. Shape of the lamella linear
and linear-oval with a dense central zone and wavy margins, abundantly branched;
new lamellas appear on the old surface; on its denser upper side, a pair of leaflets; a
forked cleavage is often observed. Lamella length 2-8 cm, 1-2.7 mm wide. In cross
section, some small cells with thick walls, close to one another, permanently
transformed into small cortical strata; cell ranges at the site of the leaflet formation
double those of the margins. Tetrasporangium, spermatangia and cystocarps develop
into spherical nemathecae provided with pedicels on stem surface, along both
sides of the leaflets and near the lamella margins. Surface of the cystocarps
wrinkled and folded.
Order GIGARTINALES
Family PHYLLOPHORACEAE
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