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394 78.Siliquar. 2.THALASSIOPHYT^. Vlcellnph,
LIII. 78. SILIQUARIA. Podweed.
Thallus compressed, ribless, branched ; vesicles pedicelled,
lanceolate, jointed; sporid'ia intermixed with jointed fibres
in roundish thecse in terminal lanceolate podshaped apo-
thecia.
Siliquaria angust'ifnlia. ISJarrow-leaved podweed,
Thallus branched ; branches alternate, 2-rowed ; vesicles
beaked.
Fucus angustifolius vesiculis longis siliqiiaruin semulis, Raii Syn. 49,39.
Fucus filiquosus, Lin. S. P. 1629 ; Engl. Dot. 474 ; Turn. Hist, 159.
Halymenia siliquosa, Lyngbye Hydr, Dan. 37.
Sea-shore; perennial; winter.
/3. minor. Thallus not more than 6 or 9 inches long.
Fucus siliquosus, Stackh. Ner. Brit.
y. denudata. Thallus long, much branched; vesicles 0.
LIV. 79. FURCELLARIA. Lamouroux. Fork-weed.
Thallus threadlike, forked, level-topped ; sporidia immersed
in regular lines in the swollen tips of the twigs.
Flagellaria luhricalis. Slippery fork-weed.
Thallus threadlike, forked, angles acute, tips blunt.
Fucus parvus segmentis praelongis teretibus acutis, Raii Syn. 45,24.
Fucus iubricalis, Gmelin, 108 ; Engl. Hot. 824 ; Turn, Hist. 6.
Fucus fasligiatus, Stackh. Ner. Brit. 15.
Fucus furcellatus, Huds. Ft. Angl. 589.
Furcellaiia Iubricalis, Lamour. Thai.
Sea-shore; perennial; Nov. Feb.
|3. fastigiata. Twigs compressed, transparent, ovate,
lanceolate, short, pointed.
Fucus sive alga exigua dichofoma, foliorum segmcniis longiusculis,
crassis et subrotuiidis, Raii Syn. 45, 25.
Fucus fastigiatus, Huds. Ft. Angl. 588.
Furcellaria fastigiata, Lamour. Thai.
Fam. III. 3. HOMOTHALAME.E. Lichenes homothalami.
Acharius,
Thallus leatherlike, cartilaginous or shrubby; sporidia
scattered, innate throughout the whole thallus, or in apothecia
of the same colour and substJince as the thallus without
any proligerous skin or central nucleus. Terrestrial
or parasitic, perennial, greenish or becoming so when
grazed, absorbing water at the surface and transmitting it
to every part.