Download PDF

332 34.Cladost. 2.THALASSIOPHYT^. PlcelLaph.
Sea- shore.
Theccc on the shorter twigs of the branches.
3. Cladostephus niveits. White hotllehnish-weed.
Thallus branched; branches slender, rather stiff, white;
twigs in obscure whirls ; joints as long as broad, dark.
Conferva nivea, Dillioyn Syn. 54 ; Engl. Dot. 2529 ; jigardh Disp. 30,
B^ssiis lanuginosus, Willan Sulph. fVat. 10.
Roots and dead leaves in sulphureous springs.
Thalli very slender; branches very numerous, ringed
with black, mostly covered with a white crust. Perhaps a
thorea; but it is very imperfectly described by authors.
X. 35. SPHACELARIA. Lyngbye. Rust-weed.
Thallus olive-branched, jointed ; branches 2-rowed
joints all compound; sporidia enclosed in the tip of the
branches v/hich become sphacellated and open, rarely in
lateral, ovate, capsular thecee.
1 . Sphacelaria pennata. Pinnate rust-weed.
Thallus much branched, slender; branches alternate,
rather bipinnate, lobes 2-rowed, alternate and opposite
joints as long as broad.
Conferva cirrhosa, Roth Cat. 3, 294.
Conferva pennata, Huds. Fl.
-ssso,
Jngl. 604; Billw. Conf. 86; Engl. Bot.
Ceramium cirrhosum, Agardh Disp. 21.
Sphaci'laria pennata, Lyngbye Hydr. Dan. 195.
Sea-shore, on rocks, corallines, and sea-plants.
Tufts bushy, from one-half to two inches high; threads
olive- brown.
2. Sphacelaria scoparia. Shore rust-weed.
Thallus much branched, stiff; branches in bundles, al-
ternate, nearly bipinnate, crowded; lobes short, alternate,
2-rowed, pressed close, pointed ; joints as long as broad.
Muscus marinus rubens, Ger. emac. 1571 ; Park. 1296.
Conferva marina pinnuta, Dillen in Rail Syn. 59, 14.
Conferva scoparia, Lin. S. P. 1 6.S5 ; Engl. Bot. 1552 ; Dilliv. Conf. 52.
Ceramium scnparium, Roth Cat. 2, 141.
Sphacelaria scoparia, Lyngbye Hydr. Dan. 104,3.
Sea-shores, on shells and pebbles; all the year.
Thallus dull, olive-brown, 3 to 6 inches high; stems
many, clothed with entangled jointed threads or twigs
clustered.