m, t 13, 
1. 00,51, 
ensissine 
tione ob- 
he. bt, 
lam, si 
ani api 
bbreviatis 
تس‎ 
s. Color 
bus 
Campbell's Islands. ] CRYPTOGAMIA ANTARCTICA, 69 
articulatis alternatim ramosissimis, ramis ramulisque patentibus simplicibus elongatis, foliis distichis breve 
petiolatis trapeziformibus basi cuneatis apice abrupte truncatis, margine inferiore integerrimo superiore in- 
ciso-dentato v. lobato, stichidiis spicatis supra-axillaribus lanceolatis dentatis, ceramidiis axillaribus sessilibus 
solitariis ovatis v. suburceolatis. P. cuneifolia, Mont. Prodr. Phye. Antarct. p. 4. Foy. au Pole Sud, Bot. 
Crypt. p. 143. (Tas. LXXVI.) 
Has. Lord Auckland’s group and Campbell's Island; abundant on the stems of the larger ۰ 
Frondes primordiales repentes, caulibus algarum radicibus disciformibus seriatim affixe, multistriate, foliis dis- 
tichis ornate. Caules e surculis repentibus orti, erecti, setacei, 4-5 unc. longi, distiche foliosi, articulati, indivisi ; 
ramis plurimis, patentibus, elongatis, simplicibus, distiche alternis vel secundis ; ramulis conformibus, alternis v. 
secundis. Folia patentia, disticha, 1. lin. longa, breve petiolata, sepissime trapezoidea, rarius subrotundata, apice 
truncata, basi late cuneata v. deltoidea; margine inferiore stricto, integerrimo, superiore lacero-dentato, v. 4—5- 
lobato, lobis serratis. Ceramidia ovato-urceolata, in sinu folii profunde fissi sessilia, sporarum fasciculum pyriforme 
foventia. Stichidia in spicis supra-axillaribus foliosis (v. bracteatis) ordinata, sessilia, lanceolata, dentata, sphaero- 
sporarum seriem solitariam includentia. Spherospore magne, atro-rubescentes. Color ameene roseus, siccitate vix et 
ne vix nigricans. Substantia membranacea.—Charte laxe adheret. 
Most of the numerous specimens of this truly beautiful plant are covered with fructification, chiefly stichidia, 
the ceramidia being, as is the case with many of the Rhodomelee, much more rarely produced. 
Prate LXXVI. Fig. 1, a leaf; 2, a branch bearing stichidia; 3, a stichidium; 4, a branch with ceramidia ; 
5, a ceramidium ; 6, spores from the same :—magnified. 
14. POLYSIPHONIA, Grev. 
1. PorxysreHoN1A botryocarpa, Hook. fil. et Harv. ; caule inarticulato valido elongato flexuoso, ramis 
alterne ramosissimis, ramulis erecto-patentibus alternis secundis sensim attenuatis ultimis subulatis articulatis, 
articulis multistriatis diametro æquantibus, capsulis minutissimis ovatis in glomerulis parvis pedicellatis den- 
sissime congestis, stichidiis seriatim affixis lanceolatis. Rhodom. Gaimardi, Gaud. ? Montagne, Voy. au 
Pole Sud, Bot. Crypt. p. 140. (Tas. LXX.) 
Var. a, crassior; caule alternatim et angulatim flexuoso, ramulis crebrioribus. 
Var. B, tenuior; caule curvato, ramulis elongatis minus divisis. 
Has. Lord Auckland’s group; both varieties abundant on the roots of large Alga, &e. 
Radix scutella parva, fibris suppeditata. Caulis 8-14 unc. longus, basi 4 lin. diam. sursum attenuatus, carti- 
lagineus, opacus, venis anastomosantibus reticulatus, alternatim flexuosus, nunc geniculatus, nunc curvatus y. 
alterne arcuatus, subsimplex vel e basi parce divisus. Rami alterni, cauli conformes, inter se circumscriptione late 
ovati, plus minusve decompositi, alterne v. secunde partiti, non vere dichotomi. Ramuli ultimi alterni v. dichotomi, 
subulati, erecti v. erecto-patentes, simplices, articulati, articulis 4—5-striatis, diametro zequantibus.  Siphones in 
ramis majoribus septem principales tubulum centralem angustum radiatim cingentes, cellulis irregularibus peripheriam 
versus sensim minoribus cireumdati. Color atro-rubescens. Ceramidia minutissima, ovata, in glomerulis perpusillis 
subterminalibus lateralibus v. axillaribus aggregata, in quoque glomerulo numerosissima, pedicellata, sporarum pyri- 
formium fasciculum includentia. Stichidia ramulis ultimis seriatim affixa, remotiuscula, spheerosporas majusculas 
angulatas pluriseriatas includentia :—Charte laxe adheeret. 
This species is of so large a size, such considerable diameter of filament, is so opaque and withal exhibits such 
slight external appearance of articulation, that it seems at first sight, to possess considerable affinity with Rhodomela, 
and further bears a strong resemblance to R. subfusca, which it exceeds in size, while agreeing with it in ramification. 
A careful examination, however, induces us to place it in Polysiphonia, and in the section to which P, fruticulosa 
S 
