1. P almella cruenta Ag.
Plate L X X X . Fig. 5.
Char. Frond indefinite, crustaceous, expanded, blood-red.
tuherculate, filled with subangidar hyaline globules, and
“ very minute punctiform scattered granules."
Tremella cruenta, E. Bot. t. 1800.; Grev. Crypt. Flor.
p. 205.; Hook. Brit. Flor. vol. ii. p. 396.; Harv. in
Manual, p. 179.
Hah. On damp walls, chiefly such as are whitewashed;
often in cellars. Glasgow: Sir W. J. Hooker. On
damp walls near the ground at Mayfield and elsewhere,
fre q u en t: Mr. Jenner.
“ The red spots in the beginning irregularly orbicular,
quickly becoming confluent, attached to earthy particles, to
stones, and other extraneous substances, form a widely expanded
crust, which, on the application of moisture, swells
up, and then especially resembles coagulated blood. By
drought their young frond grows dusky and disappears; but
more”evolved, it dries up, and is more intensely coloured; it
cracks, curls up, and falls in pieces. Rainy weather continuing,
and other Algae being evolved amongst it, especially
Oscillatoria autumnalis and Microcystis atrovirens, it becomes
green, and at length black. I f the crust be kept
immersed some hours in water, it swims on the surface
like a thin pellicle. A morsel of this subjected to the
microscope presents hyaline globules, subangular, and adorned
with a faint carneous tint, which are so closely heaped together,
th a t at first sight they appear to form a cellular membrane.
Nevertheless they are not joined by any adherence,
as is evident from the fact tha t they recede from each other
under the object glass itself with the slightest pressure. The
mucous, colourless substratum and punctiform granula or
lesser globules, more intensely coloured, then come into sight.
Moreover, a fragment of the frond itself, first submerged in
water, submitted to microscopic examination, manifests the
same organs, though less appressed, and the mucous substratum,
endowed with more consistence, is detected.”
i
Char. Cells nucleated, associated in clusters.
Derivation. From crcopos, a cluster or mass, and cnropa, a
seed.
1. S oROSPORA MONTANA Hass.
Plate L X X IX . Fig. 1.
Char. Frond between coriaceous and gelatinous, irregular,
much and variously lobed, curled, dark purple. Granules
crowded, in clusters composed o f six or eight granules each.
P. alpicola Lyngb., Hydroph. p. 2067. ap. 69. Ulva montana
Light., Scot. Flor. p. 973. Ulva montana Hudson,
llo r . Ang. p. 652. Ulva montana Withering, A rrangement
of Br. PI. vol. iv. p. 122.; Smith, E. B.
t. 2193.; Harv. in Hook. Br. Flora, p. 396., also in
Manual, p. 179.
Hah. On mosses and lichens on the summits of rocks. On
the mountains of the Isle of Skye, and west coast of
Scotland; GlenCateol: Dr. M ‘Culloch. Lying on the
ground but not attached to it, in stony moist places on
Goat Fell, A rran: Sir W. J. Hooker.
According to Lightfoot, this is the “ Mountain D u lse ” of
the Scotch.
“ On the mountains of Arran this lies unattached among
loose wet stones, covering them in a straggling manner to a
considerable extent. Each frond is an inch or an inch and a
half in diameter, flattish, somewhat orbicular, between coriaceous
and gelatinous; when dry almost horny, of a deep
but dull purple colour, much lobed and curled, like some Gy-
rophorm, filled with crowded clusters of granules, which, if
minutely examined, are found to be arranged mostly in fours.” '
— Hooh.