80 
CRYPTOGAMIA. ALGAL Fucus. 
Stone-crop Fucus. Chondria clavellosus. Turn. Hook. Discovered by 
Sir T. Frankland, growing on the rocks near Scarborough. In Dublin 
Bay. Dr. Scott. Near Sunderland, in abundance. Mr. Winch. 
A. July—Sept. E.) 
F. articula'tus. Jointed, very much branched: joints egg-cylindrical, 
tubular, branches opposite or in whirls. 
{Turn.Hist. 106— E. Bot. 1574. ~E.)—Siackh. 8. a. b—H.Ox. xv. 8. row 2. 14. 
One to three inches high, pale red purple. Seeds in the terminating joints 
and in others growing in whirls at the ends of the branches. Lightfoot. 
Stem short, more slender than the branches, joints egg-cylindrical. Branches 
opposite, jointed, swelling in the middle ; leafits only two, or four in a 
whirl, which distinguishes it from the F. verticillatus. The branches re¬ 
semble strings of oval beads, sharp at each end, resembling some of the 
jointed confervse, and still more some of the corallines. The colours 
pink, pale purple, or yellowish green: beautifully transparent. Fructi - 
jications minute blood red dots, imbedded in the upper joints. It varies 
in the flatness or roundness of the joints ; the round-jointed sort is tubu¬ 
lar, but many of the compressed kinds appear to be solid. Stackhouse, 
p. 29. 
(Jointed Fucus. Chondria articulata. Turn. Hook. E.) Ulva articulata. 
Huds. Rocks and stones in the sea, about low-water mark, Corn¬ 
wall, Devonshire, Dorsetshire, Sussex. Huds. Jura, Oransay, Skye, &c. 
Lightf. A. March—Nov. Huds.—Aug. Lightf. 
F. reopens. Gristly, creeping, branched,jointed: joints oblong, flat. 
{Turn. Hisi. 107. E.) 
Stems narrow, matted together, set with narrow straps. Shoots numerous, 
crowded, half an inch high, broadest upwards, variously and irregularly 
divided into segments, and sometimes appearing jointed, flat, (not 
hollow,) pellucid, tender, dull purple below, dirty green above. Dill. 51. 
It has many fine runners entangled together, and emitting small claw¬ 
like ligaments. From these runners, short-branched shoots are produced, 
without order; slender at the base, but broader upwards, jointed and 
much matted together. Substance cartilaginous : colour fine red purple 
or green. Stems oblong and flatted, consisting sometimes of only a single 
joint; in others there is a succession of two or three of these oblong 
joints resembling a necklace with oblong flatted beads, and in others 
again joints are sent off from the sides of these, and sometimes two 
from the end. Its colour fine pinky purple ; some of the joints now and 
then are of a bright green. Seeds in the substance of some of the extreme 
joints, like grains of fine purple powder. Lightfoot. 962. (This species 
has been much confused with the preceding, nor do all the points of its 
character appear yet to be fully understood. 
Creeping Matted Fucus. F. opuntia. Turn. Linn. Trans. 3. Rivularia 
opuntia. E. Bot. Chondria opuntia. Turn. Hook. E.) Ulva articulata , 
(3. Huds. Fucus verticillatus. var. repens. With. Ed. 2. Sea rocks 
washed by the waves, in Priestholm Island. Dill.; and near Mussel¬ 
burgh. Lightf. On the stems of F. digitatus, frequent. On the naked 
rocks at St. Michaefs Mount pier. Mr. Stackhouse. Aug. 
D. (1) Flat, midribbed, opake. 
F. serra'tus. Plant flat, forked, midribbed, serrated with teeth: 
fructifications at the ends of the branches tuhercled. 
