The English flora - SeaweedAfrica

*26'2 ALGiE.
89. Corynephora. Frond carnoso-coriaceous, hollow, formed
of filaments issuing from a central point.
90. Myrionema. Frond minute, gelatinous, parasitical
composed of short, erect, clavate, simple filaments " fixed at
their base to a thin expansion." Grev.
Tribe XX. Rivularie.e. Plants more or less globose, never
filiform, carnose, composed of continuous filaments cumulated
within.
91. Rivularia.—Character the same as that of the Family.
Tribe XXI. Nostochine^e. Plants more or less globose, gelatinous
or carnose, including granules scattered through the mass
or ai ranged in nwniliform series.
92. Protococots. Globules aggregated, naked, filled with
granules, seated on a hyaline jelly.
93. HvEMATOCoccus. Minute gelatinous fronds, aggregated
into a frustulose crust and including scattered granules.
94. Palm ella. A polymorphous gelatine, filled with dis-
tinct globular or elliptic granules.
95. Echinella. Minute gelatinous fron ds, filled with ellip-
tical corpuscules, radiating from a centre.
96. Nostoc. A gelatinous polymorphous frond, filled with
crisped moniliform filaments.
APPENDIX.
97. Schythymenia. A tough, coriaceous, spreading^/rora.?,
composed of fibres intermixed with granides.
Div. IV. DIATOMACE.E. 1
Granules (frustula) of variousforms, plane or compressed, more
or less hyaline or transparent, rigid and fragile, in parallel series
or circles, free, vahed, or imbedded in a mucous mass or gelatinous
frond, at length separating into definite segments. Small, often very
minute plants, in the sea or in fresh-water, mostly parasitic or
forming floating masses, or mixed with other aquatic vegetables.
Tribe XXII. Desmidie^e. Filaments cylindrical or angidar, at
length separating into segments (^frustula).
98. Meloseira. Frustula forming simple pseudo-articulated
filaments, constricted at the articulations, fragile, easily separating.
1 By Dr. Greville.