Alga, by W. H. Harvey.) FLORA OF TASMANIA. 335 
A small species, 2-3 inches high, not unlike the northern C. roseum, but differing in several respects. The 
principal branches are bundled together into ropes, and then closely interwoven by root-like fibres, which issue from 
the nodes, and proceed downwards along the stem, forming an accessory stupose stratum. ‘The branches are alter- 
nately pinnate below, and bipinnate above, all the pinnules remarkably patent and elongate. Tefraspores are thinly 
scattered on the inner faces of the pinnules. 
10. Callithamnion conspicuum (Harv.) ; fronde elata incrassata per totam longitudinem stuposo- 
corticata et hirsuta decomposite ramosa, ramis conformibus alternis attenuatis repetite alterne divisis, ra- 
mulis solum ecorticatis articulatis dense ramellosis, ramellis quaquaversis alterne pinnatis, pinnis incurvis, 
articulis pinnularum diametro triplo longioribus, tetrasporis ad latera pinnularum sessilibus solitariis.— 
C. tingens, Harv. Alg. Exsic. n. 508. Spongoclonium conspicuum, Sond. ! in Linn. xxvi. p. 515. 
Has. Georgetown. 
Disrris. South coast of Australia. 
Frond 12-18 inches long, the main stem generally undivided, 1 or 2 lines in diameter, set throughout its whole 
length with closely placed lateral branches directed to all sides. Branches, like the stem, thickly corticated and 
shaggy with stupose filaments, 3-1 line in diameter, 6-8 inches long, repeatedly compounded with alternate lateral 
branches and branchlets. The ultimate divisions, which are from half an inch to an inch in length, are alone visibly 
articulate, and are thickly clothed with short, pinnulate, incurved, articulate ramelli, on which the tetraspores are 
borne. Colour a fine carmine, which is quickly given out in fresh-water, staining the paper on which the plant may 
be dried. Substance very tender, rapidly decaying.—The habit of this species is peculiar, and perhaps, with C. plu- 
migerum and O. superbiens, it might form a separate genus, characterized by the peculiarly inarticulate and hirsute 
stem. But there are many intermediate links with species of more ordinary characters. The diameter attained by 
the stem is greater than in any other known species.* 
11. Callithamnion laricinum (Harv.); fronde cartilaginea setacea ( 1-5-unciali) fere ad apices 
ramorum corticata glabra guoguoversum ramosa ambitu pyramidali, ramis alternis patentibus superne sen- 
sim brevioribus ramulis dichotomo-multifidis undigue obsessis, ramulis pluries dichotomis, segmentis paten- 
tibus, ultimis brevissimis spineeformibus, favellis geminis oblongis simplicibus v. furcatis, tetrasporis glo- 
bosis ad latera ramulorum sparsis.— Zarv. in Trans. R. I. Acad. xxii. p. 562. 
Haz. On Zostera, etc. Port Arthur, W. H. H. 
Disrris. West and south coasis of Australia. 
12. Callithamnion dispar (Harv.) ; fronde pellucide articulata capillari plus minus pinnatim ra- 
mosa disticha, ramis primariis paucis inegualibus virgatis bipinnatis, pinnis oppositis patentibus inegualibus 
una abbreviata altera elongata pinnulata, pinnulis oppositis sequalibus horizontalibus crassis multifidis mu- 
cronatis, articulis ramorum diametro duplo pinnarum sesquilongioribus, pinnularum diametro «equalibus, 
tetrasporis ad latera pinnularum sessilibus.—Harv. Alg. Easic. n. 509. 
Has. East coast; parasitic on Mychodea disticha, Gunn. 
Drsraim. Port Fairy, Victoria, W. H. H. 
Fronds solitary or few together, 1-2 inches high, with a simple stem set with lateral branches, * few of which 
are long and virgate, the rest reduced to a line or two in length. All the branches and their divisions and ramuli 
are opposite. The lesser divisions are regularly pinnated, the pinne long and short alternately at either side of the 
* Since this was written, I have ascertained that my C. tingens is the same as Sonder's Spongoclonium conspi- 
cuum, which name will be adopted if the plant be removed from Callithamnion. Another synonym is my Lasiothalia 
hirsuta, in Trans. R. I. Acad. xxii. p. 558, founded on a very imperfect and battered scrap of what I afterwards 
called Callithamnion tingens when more perfect specimens were collected. 
