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3m 29, Callith. 2.THALASSIOPHYTiE. PlcdLaph,
IS. CaUiihamnion Roihii. Roth's pretty-weed.
Thalhis forked, branched, tufted, upright, short; tuft
close, scarlet ; brunches and twigs alternate ; joints about
3 times as long as broad.
Conferva phoeiiicia, R. Brown MSS. With Bot. 4, 165.
Conferva Rothii, Turion's Sysi. Nat. 6,1806', Dillw. Conf.l3; Engl.
Bot. 1702.
Conferva vioL-icea, Roth Cat. 1, 190.
Callithamiiion RoUiii, Lynghye Hydr. Dan. 129.
Sea-shore.
Tufts oblong, bright red, when dry crimson or purplish;
ihallus about half an inch high; IruTiches below distant,
above crowded.
14. Callithamnion lanuginosum. Woolly pretty-weed.
Thallus short, slender, mostly branched, light reddish;
Iranches simple, upright, scattered, going out horizontally.
Conferva lanuginosa, Dillw. Conf.
Callithamnion lanuginosum, Lynghye Hydr. Dan. 131.
On marine plants.
Threads very minute, coming out horizontally from the
base, simple or branched above.
15. Calliih.Jioridulum. Smallfloivered pretty-iveed.
Thallus short, slender, tufted, entangled, mostly branched,
very light rose-red ; branches scattered, mostly simple,
remote, placed towards the apex; joints about 3 times as
long as broad.
Conferva floridula, Dillw, Syn, 73.
Roclis on the sea-shore.
Threads very fine, about half an inch long; becomes dull
reddish green when dry.
16. Callilh. intcrruptum. Interrupted pretty-weed.
Thallus branched, short, purplish; branches and twigs
alternate ; joints dilated above, truncated, about four times
as long as broad ; theco! lateral, elliptical, with a transverse
separation, on short pedicells.
*^ Conferva internipta, Engl. Bot. 1838.
On marine plants.
Thallus dull rose-red, about an inch high.
17. Callith. pedicellaturru Pedicelled pretty-weed.
Thallus much branched, forked, hairlike, red; twigs
many-cut; joints slightly dilated above, 5 or 6 times as