The English flora - SeaweedAfrica

312 ALG^I INARTICULATE. [Ulva
** Fresh-ivater species.
4. U. bullosa, Roth, (blistered green-Laver) ; frond obovate saccate
gelatinous at length irregularly expanded floating waved and
bullate. Grev. Ag. Sp. Alg. v. \.p. 414. E. Bot. t. 2320.— Ulva
Lacticca, /3. Huds.— Lightf.
Stagnant pools and ditches of fresh water. 0. Spring and Summer.
—Much resembling U. Lactuca, but smaller, subgelatinous, lubricous,
firmly adhering to paper, and excessively tender. Lightfoot observes
that it has the appearance of being in a state of fermentation : and I
have, myself, in the Flora Scotica, hazarded an opinion that its differences
from the species just-mentioned may arise from the different
places of growth. It is very soft and lubricous. In its texture it seems
to unite Tetraspora with Ulva.
* Terrestrial species or growing on walls and rocks.
5. U. crispa, Lightf. (crisped green-Laver); fronds denselycrowded
inflated plaited and wrinkled with rounded lobes
Ag. Sp. Alg. p. 116. Grev. Alg. Brit. p. 175.— Ulva terrestris,
Both.— Ulva Lactuca, y. Huds.—Dill. Muse. t.
9.f.
6.
Shady walls, on thatched roofs, at the foot of walls, rocks, houses,
&c., not unfrequent. 0. Winter and Spring.
6. U. furfurdcea, Horn, (furfuraceous green-Laver); fronds
very minute roundish-ovate distinct suberect, forming a thin
crowded stratum. Grev—Fl. Dan. t. 1 489. Lyngb. Hydroph.
Dan. p. 32. Ag. Sp. Alg. v. I. p. 417. Grev. Crypt. Fl. t. 265.
Alg. Brit. p. 176.*. 18.
On the tops of a few of the large boulders near the high-water line, and
on a rock by the side of one of the lakes of Lismore, at Jill seasons*
Capt. Carmichael. On the walls of King's College, Cambridge, Rev.
M. J. Berkeley.— " Fronds closely tufted, forming a vivid green stratum,
a yard or more in extent, 2—3 lines in length, erect, obovate, truncated
and usually eroded at the top, tapering at the base into a longish claw,
margin inflected, substance firm and void of lubricity. Sjioridia in
fours. It does not adhere to paper," Carm. MSS.
7. U ? calophylla, Spreng. (delicate green-Laver); fronds caespitose
from a capillary base dilated into a membrane marked
Avith 4— 12 longitudinal lines, granules biseriate in each stria.
Carm.— Grev. Crypt. Fl. Synop. p. 42. Alg. Brit. p. 176.—
Bangia calophylla, Carm. in Grev. Crypt. Fl. t. 220.
On a stone, within 50 yards of the Manse door, Lismore; October;
Captain Carmichael. On old decayed pieces of railing attached to a
cot-house in the Greenses, Berwick, Dr. Johnston.—-" This very rare and
beautiful Alga grows in considerable tufts of a vivid green colour, having
the effect of a continued fleece covering the whole surface of the
stone. Filaments about a line in length, form a capillary base, dilated
into a lanceolate foliaceous membrane, generally flat, but sometimes
remarkably twisted and marked with from 4 to 12 longitudinal stripes
each stripe consisting of a double series of globular granules." Carm.
MSS.—Although arranged by Captain Carmichael among the Bangw,
—