The English flora - SeaweedAfrica

Polysiphonia.] AI.G.E CONFERVOIDE/E. 333
ing each other; joints variable, those of the main stem 3 — 5 times, of
the ramuli about twice, as long as broad. Colour when recent of a " bright
brick red" (Mrs. Griffiths), changing in the herbarium to a deep umber
brown : substance, according to the same lady, " at first firm, but becoming
flaccid immediately." Capsules unknown. A most distinct and
beautiful species.
18. P. fastigiata, Grev. (fastigiafe Polysiphonia) ; filaments
—
— 3;
rigid setaceous equ.il, many times dichotoinous, axils patent,
articulations shorter than their diameter.— Conferva polymorpha.
DiUw. Conf. t. 44.
Alg. v. 2. p. 67.
E. Bot. t. 1764 Hutch, fastigiata, Ag. Sp.
Parasitic on Fucus nodosus, vesicalosus and serratus: very common.
Copt. Carmichael finds this species frequently bearing tufts of very minute,
lanceolate, yellow, pod-shaped bodies (antheridia) on the apices of the
branches, in such abundance as quite to affect the colour of the plant.
Similar bodies are occasionally seen on others of the Genus.
19. P. Fichardsoni, Hook. MSS. (Dr. Richardson's Polysiphonia)
; filaments cartilaginous, branches elongate divaricating
beset in the upper part with very patent straight sub-
diehotomous ramuli, articulations of the stem and branches 2—
times longer than broad irregularly veined, of the ramuli shorter,
capsules sessile globose.
At Colvend, Dumfries, Dr. Richardson.—3—4 inches high, rigid,
nearly as thick as hog's bristles at the base, branched throughout
branches alternate, often issuing at right angles. Colour a dull-red,
becoming darker in drying. Main articulations marked with numerous
anastomosing irregular tubes, those of the lower branches 3— 5-
tubedj of the ramuli 2—3-tubed. Capsules sessile, scattered, subglobose,
with a very wide truncated aperture.
\\\ Jihiim ids rigid, cartilaginous ; raundijlacci'L membranaceous*
20. P. elongate, Grev. (Lobster-horn Polysiphonia) ; filaments
robust cartilaginous Bubdichotomous Bbrubby, ramuli Blender
attenuated ai base fasciculate Bubterminal, articulations shorter
than broad reticulated with veins.— Conferva elongata* Dillw.
Conf. t. >>. E. Bot. t. 2429s—Hutchinsia elong.* Ag. Sp. Alg*
r. 2. j>. 82.— Ceramiunx elong., Lyngb. Hydroph* Dan. />. 1 17.
Grcr. Crypt. Edin. p. 810,— 3* denudata ; filaments nearly
opaque distorted beset with wart-like excrescences and desti-
tute of ramuli. Cer* brachygonium, Lyngb. Hydroph. Dun. t.
36.—
/. sanguinolenta; ramuli mostly confined to the apices "t
the branches spreading in broad dense fasciculi, ofa fine crimson
colour. Ag. Sp. Alg. p. 85,—/'. rosso, Grev. Crypt. Edin*
p. 810, (according
( authentic tpecimens,
bore,