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Plcell.aph. 2.THALASSI0PHYT^. 35. Sphacel. 33S
S. Sphacelaria Mertensii. Merte?i's rust-weed.
ThaLlus branched, yellowish brown; branches pinnate;
lohes mostly opposite, short; joints half as long as broad.
Conferva Mertensii, Engl. Bot. 999 ; Dillw. Syn. 79.
Tiifls 3 inches high; 5/ew5 many, cylindrical, pinnate;
branches short, opposite, 2-rowed, from the base of the
stem; pellucid.
4. Sphacelaria ccespitula. Small-tiifted rust-weed.
Thallus tufted, very small; branches mostly simple, alternate,
long, blunt.
Conferva olivacea, Dillw. Syn. 57.
Sphacelaria csespitula, Lyngbye Hydr. Dan. 106.
On Other sea-plants.
Threads about a line high, aggregated, yellowish green.
5. Sphacelaria fiisca. Brown rust-weed.
Thallus threadlike; branches distant, mostly alternate;
twigs spreading, clublike ;yom/^ transversely banded in the
middle, as long as broad.
Conferva fusca, Huds. Fl. Angl. 602 ;
Stones and rocks in the sea.
Threads 3 or it inches long.
Dillw. Conf, 95.
XI. 36. ELLISIUS. Ellis.
Thallus rose-red, branched ; main stem solid, continuous,
or slightly jointed; branches and twigs scattered, jointed;
joints of the twigs simple, composed of one tube; thecce
ovate, lateral, or immersed in the tip of the branches. —
Marine.
1. Ellisius glaber. Bald ellis.
Threads much branched, red; stem thick, jointless, netlike,
naked below, very much branched above; twigs
crowded, nearly in whirls, short, alternately branched^
jointed ; joints as long as broad.
Conferva Arbuscula, Dillw. Conf. 85 ; En^l. Bot, 1916.
Sea-shore.
Thallus tufted, 2 inches high.