The English flora - SeaweedAfrica

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Htematococcus.] ALGiB GLOIOCLADEiE. 395
carp, inclosing an uniform coloured mass, and he considers our
British plant to be a different species, belonging- to the genus
Htematococcus. Having minutely examined a specimen from
Agardh himself, submitted to me for that purpose by Dr. Gre-
ville, and finding exactly the same compound structure as in
our British specimens, I do not hesitate to pronounce the two
plants identical.
1. P. nivalis, Ag. (crimson Protococcus or Red-Snow); "globules
exactly spherical very minute fine purple-red, gelatinous
mass pale spreading." Gre.v. Crypt. Fl. t. 231. (admirable).—
Ag. Syst. Alg. p. 13, et Ic. Alg. Europ. t. 21. Haimatococcus
Grevillii, Ag. Ic. Alg. Europ. t. 23. Palmella
Parr. 2d. Voy. App.— Vredo ?iivalis, Bauer.
nivalis, Hook, in
" On the borders of the lakes of Lismore, spreading over decaying
leaves, &c. ; but in greater perfection on the calcareous rocks, within
the reach of occasional inundation." Captain Carmickael. Near Miltown
Malbay, on schist; at Limerick, on limestone; and about Dublin, on
granite; in most cases slightly inundated, W. //. Harvey.— This curious
little plant, which, under the name of Red Snow, has excited no inconsiderable
interest among the greatest botanists of the age, is usually
found in this country in the form of a thin, stain-like stratum, on the
surface of rocks or investing decayed vegetable substances with a pur-
ple crust. It was brought by Captain Ross from the Arctic regions,
where it was observed covering the surface of the snow, in patches
of many miles in extent, and penetrating in some places to the depth
of twelve feet. It has likewise been found to occur commonly, on most
of the mountains of Europe, in similar situations.
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93. KLematoc;6ccus. Ag. Hsematococcus.
Globules naked, containing granules, aggregated into a frus-
tulose CTUSt.— Name; a//xa, blood, and xoxxog, t\w fruit; many of
the species are of a red colour.
1. II. frustulosus, llarv. (grayislMavk Hamotococcus); crust
widely spreading friable dark-gray, globules roundish hya-
line including numerous scattered minute granules.— Pabnetta
frtutuloea, ( '(irm. MSS,
On irrigated cliffs, perennial, Capt, Carmickael.— "It occurs in the
form of a grayish-black, fragmentary scurf. n the slightest pressure,
it separates into corpusculea of various forms, but mostlj Bphaencal, hya-
line under the microscope, surrounded l>> a membranous envelope including
several granules." ('arm. A'
2, H. tanguineuij Ag, (red Hcematococcus); crust spreading
lofi triable of a brick-red colour, -lobules polymorphous in-
eluding 1
; > granule Ag, Ic, Alg, I'm,,p. t. 24.—Patmeliaf
tamgtUnea, Ag, Syst, Alg. p. 15.— PaimeUaf cryptopkyUa, Varm.
MSS, cum " "i" .
'•on a stalactitic incrustation, lining tin- vault ol i in a
quarts rock, Appin," CapL Carmickael.— "This singular production
, ads over the drj roof of the cavern t.» the extent of several \ Bros,
in the torn i of a thick uneven effiore* ence, of a brick-red colour exti r-