Gen. LXXXIX. ERYTHROCLONIUM, Bond.
(Sond. in Linnæa, xxv. p. 691.)
1. Erythroc lonium Mu e lle r i (Sond. I.e . p. 692). — Rhabdonia ? verticillata, Harv. in Herb.
T.C.B.
H a b . Georgetown, W. H. II.
D i s t e ib . South coast of New Holland.
The Georgetown specimens are very much larger than those fi-om New Holland, but do not appear specifically
different.
Gen. XC. GLOIOSACCION, Harv. (nov. gen.)
Frons sacciformis, succo gelatinoso repleta, membranacea, ex stratis fere tribus conflata; stratum ■medulläre
cellulis maximis gelatinosis cito ruptis, intermedium cellulis rotundato-angulatis coloratis, corticale
cellulis minimis iu fila verticalia ordinatis. Fruct.: favellidia globosa in strato intermedio immersa,
uucleolis pluribus demum confluentibus composita ; 2, tetrasporoe . . . ?
1. G loiosac cion B rown ii (Harv. Phyc. Austr. t. 83).— Halosaccion firmum et II. hydrophora,
Harv. Alg. Austr. Exsic. n. 419, 420 {nec aliorum). Eucus allantoides, R. Br. MSS. ? in Turn. Hist. iv.
p . 105.
Var. a. membranaceum-, fronde sanguinea, membranacea.— Harv. Alg. Exsic. n. 419.
Var. 0 . coriacea; fronde livido-purpurea, coriacea.—Harv. I. c. n. 420.
H a b . Var. a . Georgetown, W. H. H.
D i s t e ib . Both vars. at Fremantle, West Australia. Var. a. Port Phillip.
I formerly mistook this plant for Halosaccion, a genus founded on Fucus saccatus, Turn., to which externally it
bears the closest resemblance. The substance, structm-e, and contents are however veiy different. I now suppose
it may be the plaut alluded to by Turner, iu his remarks under F. saccatus, as having been brought from Australia
by Mr. Brown, aud characterized by being filled with pellucid jelly.
Gen. XCI. GYMNOGONGRUS, Mart.
(Mart. Bras. p. 27. J. Ag. Sp, Alg. ii. p. Zl3.—Tglocarpus, Oncotylus, etc., Kütz,)
1. G3n nn ogongn is fa stig ia tn s (Harv.) ; fronde pusilla filiformi vel parum compressa dichotome
ramosissima fastigiata flabelliformi, ramis ramulisque densis apice attenuatis subacutis, axillis obtusis, cystocarpiis
infra apices ramulorum nodoso-incrassatis immersis circumcirca prominentibus.
H a b . Granite rocks at half-tide : Forester’s River, Gunn.
Fronds forming dense pulvinate tufts, from 1-1^ inch high, about as thick as hog’s-bristle, filiform or subcompressed,
rising with a simple stipes for half an inch, then forked, and afterwards many times dichotomous, the upper
divisions being close together. All the branches are suberect, but the axils are rounded, though narrow. The
ultimate ramuli taper slightly to the point, and are all of one height. Cystocarps either solitary or two or three in
succession, immersed in the terminal ramuli.—In habit and size this species resembles G. densus and G. pygmans.
2. Gymnogongrus fo r c e lla tu s (?) (Ag. ; J. Ag. Sp. Alg. ii. p. 318).—Sphærococcus furcellatus,
Kiitz. Sp. A lg .p . 737.
H a b . Southport, C. Stuart.
D i s t e ib . New Zealand. Pacific coasts of South America.
The specimens are not very satisfactory. They ar
but scarcely specifically different.
more slender than the ordinary form, and less comjrressed.
Gen. XCII. MYCHODEA, Harv.
(Harv. Lond. Journ. ri. p. 407. Kütz. Sp. .Alg. p. 12Z.— Cijstoclonii sp,, J . Ag. Sp. Alg. ii. p. 306.)
1. Mychodea carnosa (Hook. fil. et Harv. Lond. Journ. vi. p. 408; Kütz. Sp. Alg. p. 723).—
Cystoclonium carnosum, J . Ag. ii. p. 809.
H ab. Georgetown.
D istiub. South coast of New Holland.
2. Mychodea membranacea (Hook. fil. et Ilarv, Lond. Journ. vi. p. 408 ; Kütz. Sp. Alg. p. 723).
—Cystoclonium membranaceum, 3. Ag. ii.p . 309.
I I a b . Georgetown.
D ist e ib . South coast of New Holland.
3. Mychodea te rmin alis (Harv.) ; fronde tereti carnoso-membranacea decomposite ramosissima,
ramis patentibus alternis sparsisve multifidis v. subdichotome divisis flexuosis, axillis rotundatis, ramulis
subulatis simplicibus v. divisis, cystocarpiis ramulos (fere omnes) terminantibus. — Ilarv. Alg. Exsic.
n. 413.
H ab. Above Georgetown, in the Tamar, Gunn, IF. II. II.
I fonuerly confounded this species with M. membranacea, and have perhaps distributed it sometimes under tbat
name. Except when in fruit, it is not always easy to distinguish between them without close examination. The
position of the cystocarps affords however a satisfactoiy charactei-, as in M. membranacea they are sessile along
the sides of the larger and smaller branches. It is a more slender and diffusely branched plant, with less of a primary
stem than M. ■membranacea.
4. Mychodea d isticha (Harv.) ; fronde lato-lineari ancipiti carnoso-cartilaginea distiche ramosa,
nunc subdicliotoma, nunc caule subindiviso ramis lateralibus alternis v, oppositis, ramis simplicibus v.
iterum compositis ligulatis basi eonstrictis obtusis, ramulis minutis creberrimis marginalibus nunc longioribus
ligulatis, cystocarpiis iu ramulis immersis.— Ilarc. Alg. Exsic. Aust. n. 416. (Tab. CXCII. A.)
H ab. East coast, Gunn.
Frond 10-12 inches higli, about a line in breadth, strongly compressed and two-edged, distichously branched,
the main stem either tivice or thrice foi-ked, or nearly simple, and set with numerous long, strap-shaped, simple or
slightly divided branches, which are patent or suberect, constricted at their insertion, and slightly nan-owed to the
point. The branches and their minor divisions are closely fringed with short compressed ramuli, 2-4 lines long,
occasionally intermixed with others of greater length. Cystocarps are imbedded in the tips of the ramuli. Colour,
when dry, veiy dark. Substance rigid, very imperfectly adhering to paper.—In habit this plant more resembles
Prionitis, but the stnicture of both frond and cystocarp is that of Mychodea.—PuiTE CXCII. A. Fig. 1, a frond,
nat. sise; 2, ramulus, with cystocarp; 3, section of cystocarp ; 4, section of frond ;—the latter figiu-es magnified.
5. Mychodea hamata (Harv.); fronde carnoso-membranaeea compressa siccitate rugulosa cæspitosa
a basi ramosissima, ramis dichotome multifidis basi et apice attenuatis nunc nudis nunc ramulis lateralibus
plus minus onustis, axillis omnibus rotundatis, ramulis lateralibus patentibus v. divarieatis sæpissime re-
flexo-Iiamatis acutis, cystocarpiis ad latera ramorum sessilibus cornutis.—Ilarv. Alg. Exsic. Austr. n. 415.
H ab. Georgetown and Port Artliur.
D ist e ib . South coast of New Holland.
This forms large, loosely interwoven, globose tufts, on stones aud Algce, near low-water mark, at tlie mouth of
the Tamar. The tufts spring from matted, branching root-fi-oiids. The erect fronds are 6 -8 iuches long, angularly
compressed, about a line in diameter, rather succulent when recent, shrinking in drying, and becoming furrowed ;