The English flora - SeaweedAfrica

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Lecidea.] LICHEN ES. 179
27. L. uliginosci) Ach. (earthy Marsh Lecidea); crust olivebrown
granulated subgelatinous, apothecia black flattish with a
black smooth border at length convex and clustered.
p. 25. Lichen ulig., Schracl.— E. Bot. t. 14G6.
Ach. Syn.
Sandy heaths, near Yarmouth, Mr. D. Turner. Surrey, Mr. Borrcr.
28. L. sytiothea, Ach. (minute crowded Lecidea); crust indeterminate
somewhat gelatinous minutely granulose uneven
sooty-brown, apothecia minute dull brownish-black pale within
at length convex, the border narrow evanescent. JBorr.—
Ach. Syn. p. 26. Borr. in E. Bot. t.21\\.
On the surface of squared rails of oak and deal at Esher, Surrey, and
Henfield and Boxgrove, Sussex. Mr. Borrcr.— " It requires a practised
eye to distinguish this species from other obscure Lichens, which usually
grow on rails ; but its structure is found, upon examination, to be peculiar.
It has a near affinity to L. idiginosa." Borr.
29. L. simplex, Borr. Mss. (simple black-shielded Lecidea);
crust olive thin smooth scattered soon disappearing, apothecia
scattered or crowded olive-black with a thick elevated
blackish border at length rugged and contorted. Sm,—Lichen
simplex, Dav. in Linn. Trans, v. 2. p. 283. t. 28. f. 2. E.
Bot. t. 2152, (the figure on slate-rock).— Opegrapha Persoonii,
(3. Ach. Syn. p. 71.
On slate and sandstone rocks, in various parts of Great Britain. Sm.
30. L. immersa, Ach. (sunken Lecidea); crust spreading thin
subcontinuous whitish, apothecia plano-convex immersed in the
stone bordered black, the disk subpruinose blackish-red when
moist, at length rather convex whitish within. Ach. Syn. p. 27.
—Lichen immersus, With.—E. Bot. t. 193.
On calcareous rocks.— In general appearance, this Lichen is vcrv
closely allied to Ferrucaria Schraderi; but the apothecia arc those of a
Lecidea.
31. L. riruliisa, A