J4&1«
2889.
C ALLITH AMNlON^rbatum.
Bearded Callithamnion. . I
CR YP TO GAM I A Alga.
Gen. Char. Filaments mostly pinnated, rarely dichotomous
: dissepiments colourless. Capsules scattered,
with wide colourless borders. Receptacles
sessile on the branches, lobed, containing large
granules.—Harv.
Spec. Char. Stems rising from creeping filaments,
tufted, much and irregularly branched ; branches
opposite or alternate, either simple or pinnulated
for half their length, with minute, opposite, spinelike,
ereeto-patent ramuli. Articulations 2 or 3
times longer than broad. Capsules elliptic-oblong,
sessile on the sides of the pinnulse.—Harv.
Syn. Callithamnion barbatum, Ag. Sp. Alg. v. 2. 181.
Harv. Brit. Alg. 114.
F o r m in g densely tufted deep red patches, from 1 to 2
inches high, on mud. From the creeping filaments, which
consist of joints 3-4 times as long as broad, arise erect threads
which are more or less naked below, but clothed above with
irregularly placed short patent branches; some of which are
simple, or furnished with a few irregular pinnae; others, especially
towards the top, are pretty regularly pinnate for the
greater part of their length with short opposite pinnae, of
W'hich here and there an individual is furnished with a short
branchlet. Capsules oblong-elliptic, seated laterally, without
any stipes, on the pinnae either externally or internally, with a
broad pellucid margin. Main articulations 3-4 times as long
as broad.