r [ 2320 ]
TJLVA bullosa.
Cellular Green Laver,
CRYPTOGAMIA Algce.
Gen, Char. Frond membranous or gelatinous. Seeds
solitary, scattered throughout its substance, under
the cuticle.
{Spec. Char. Membranous, very-tender, dilated upwards,
variously sinuated, cellular, bright green.
£>y n . Ulva bullosa. Both. Catal. v, 3. 3 2 9 .
U. Lactuca/3. Huds. 5 6 7 . With. v. 4. 123,
Tremella palustris, vulgari marinae similis, sed minor
et tenerior. D ill. Muse, 4 4 . t. 8 . f , 2 .
To this we alluded in v. 22. p. 1551, as a ( ( supposed variety”
of U. Lactuca, not without a strong suspicion that they
must be distinct species, differing in their place of growth,
texture and duration, which is confirmed by the opinion
of Roth, and by the specimens before us, collected by
Mr. W.Borrer at Henfield, Sussex, last July,
Dillenius observed this plant in shallow stagnant waters, “ in
the meadows behind Newington,” chiefly in the spring, and
remarks that as the warm weather came on, it floated on the
top, turned yellowish, and became full of air-bubbles as if in
a state of fermentation, The whole is of a smaller size than
U. Lactuca, t. 1551, much more slippery and slimy, scarcely
bearing to be touched without breaking and spoiling. The
shape is various and uncertain. When at maturity the frond
becomes cellular, somewhat like a cabbage-leaf. Under a mi.
croscope it appears beautifully dotted, as if reticulated.