The English flora - SeaweedAfrica

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346 ALG^ CONFERVGIDE^. [Calithamnion.
nately branched, branches with an axillary tuft, plumules
narrow-elliptical or lanceolate bipinnate, articulations of branches
flexuose with swollen joints, twice as long as broad, those of
the pinnae shorter. Ag. Sp. Alg.v. 2. p. 168.
Plymouth, Mr. Sconce. Pier, Torquay, Mrs. Griffiths.— 1—2 inches
high ; stem and branches flexuose, pinnae and pinnulae very slender, the
larger plumules with an axillary tuft like the branches, articulations of
the stem remarkably torulose at the joints, Colour rose-red.—Very
closely allied to C. thuyoides, but differing in its shorter articulations,
torulose joints, and the axillary tufts of the branches.
25. C. thuyoides, Ag. (Arbor-vitce Calithamnion) ; very
slender irregularly branched, plumules linear-lanceolate bipinnate,
articulations of the branches 4—6, of the pinnae 2—3 times
longer than broad, capsules terminal. Ag. Sp. Alg. v. 2. p. 172.
— Conferva thuyoides, E. Bot. t. 2205.
Very rare : Yarmouth, Mr. Borrer. Plymouth, Mr. Sconce.—Very
flaccid and slender, 1—3 inches high : plumules distant, alternate, 2—3
lines long ; ramuli extremely slender. Colour a fine rose-red.
b. Secondary or smaller branches alternately dichotomous. Cap-
sules elliptical, solitary, axillary; favellce mostly binate.
26. C. corymbosum, Ag. (corymbose Calithamnion); capillary
flaccid and gelatinous, secondary branches alternate excessively
dichotomous level-topped, ultimate ones dichotomous acute appressed,
articulations of branches 8— 10, of the ramuli 5—6 times
longer than broad.—Ag. Sp. Alg. v. 2. p. 165 Conferva co-
rymbosa, E. Bot. t. 235'i, (Joints too short.)
Rare; at Brighton, Mr. Borrer. Bantry, Miss Hutchins. Appin,
Capt. Carmichael. Bute, Dr. Greville.— l—3 inches high, excessively
delicate and tender, much branched, secondary branches byssoid. Colour
a delicate rose-red. Capsules minute, elliptic-oblong, shortly pedicellate,
solitary, very rarely binate, trisporous, axillary. Favella large, binate.
The figure in E. Bot. is not good, as it represents the joints too short.
Our description is taken from Mr. Borrer's original specimens.
27. C. versicolor, Ag. (changeable Calithamnion); filaments
setaceous at base, capillary above, flaccid and tender, penultimate
branches alternate naked below, excessively dichotomous
above, level-topped, ultimate dichotomies spreading, articulations
of branches 4—6, of ramuli 2—3 times longer than broad.
Ag. Sp.Alg.v.2.p.l70 (according to specimensfrom the author).
-2— 3 inches high, nearly as
Coast of Devonshire, Mrs. Griffiths.—
thick ashog'sbristle at the base, excessively branched and capillary above;
branches set with alternate, erecto-patent, obovate, secondary branches,
generally naked below, their upper half furnished with dichotomo-multifid
alternate ramuli. Colour a beautiful rose-red. Capsules elliptical, subsessile,
solitary on the ramuli, in the axils of the dichotomies or at one
side. Favellce large, binate. Nearly allied to C. corymbosum, but a
larger and much coarser plant ; the joints shorter and the ultimate
dichotomies closer and more patent.
28. C. spongiosum, Harv. (spongy Calithamnion); stems
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