R I C C I A natans.
Fringed Riccia.
C R Y P T O GAM I A Alga.
Gen. Char. Cal. and Cor. none. A nthera cylindrical,
feffile upon the germen, and perforated by
theJlyle. Capfule globole, crowned with the withered
anthera. Seeds hemifpherical, on foot-ftalks.
Spec. Char. Fronds inverfely heart-fhaped, ciliated.
Syn. Riccia natans. L in n . S yjl. N a t. ed. 12. v . 2.
708. Hudf. F I. A n . 522. W ith . Bot. A rr. v . 3.
162. R elh . C a n t.-S tiffl. 3. 11.
Lichen parvus vernus cordiformis, ima parte fim
briatus, Lends paluftris modo aquas innatans.
R a il Syn. 116. D ill. Mujc. 536. t. 78./. 18.
VJATHERED in ponds near Beverley, and fent with the
lall, by Mr. Teefdale. This is an extremely rare fpecies. It
was obferved by Buddie formerly in ponds near Hadleigh (not
Henley,) in Suffolk ( Raii Syn. J, and has fince been found by
Mr. Relhan near Cambridge, and the Rev. Mr. Bryant, near
Heydon in Norfolk. Its fructification is unknown, but from
the habit there can be little doubt about the genus.
The fronds float like duck-weed, and are in perfection jn
autumn. Each is cordate, more or lefs deeply lobed, fcarcely
the diameter of a fplit pea. Their upper furface is minutely
fcaly, their margin fringed, but the numerous lanceolate fer-
rated fcales of the under fide extend far beyond the fringe.
We have delineated it of the natural fize as well as magnified.
Dillenius’s figure is a very poor one.