12 
CRYPTOGAMIA. ALG. Lichen. B. (2) Crastaceous; 
with TUBERCLES.. 
Hoffm, enum. 4613 and lith, 11.3. 
> Crust like tartar, unequal, thickish, raised, cracked and tes. 
sellated, pale sulphur. colour, white at the edge when broken. 
Tubercles at first numerous cloudy spots, at length rising out. of 
the crust, not readily..distinguishable from it but by the blackish 
or dirty reddish colour. Horeman. Crust and tubercles soft 
- and.almost: gelatinous..: » 
flavo-vires’- 
cens. 
_ Rocks in Scotland. [Covers the walls and tiles of Caté 
lidge house, near Newmarket. Retuan. | | 
fo ohencles black, rough - crust. green yellow, mealy, 
Dicks. ili. a ar eee 
ej yeas ; Dicks, 8. D+ tees: r% » 
Crust scarcely cohering,. composed..of farinaceous. globules, 
of .a. fine yellow with a greenish cast. Tubercles few, thinly 
scattered, of a middling size. Dicks. fase. iii, 13... Not Le 
flavo-virescens of Gmel. syst. veg. 
wo Mar. Tubereles.‘black, very minute ; crust fine yellow 
green, granulated. = is. 
_ Specimens from the top of Garnedd fives by Mr. Griffith. 
The tubercles aré smaller than in Mr. Dickson’s plant, the gra- 
nulations of the crust much larger, but equally soft and farinace- 
ous, The colour of the crust varies from green to yellow green. 
atro-vi‘rensL. Tubercles black : crust fine green: border black. 3 
rupi‘cola. 
AHoffm. lich. 17. 4-Facq. coll. ii. 14. 2. 
Tubercles small, of a yellow-greenish colour, crowded, sothat 
the whole surface appears of a yellowish green, bordered by a 
black margin. Linn. Crast hardly discernible on a slight in- 
spection, inseparable, blackish, set with innumerable minute yel. 
lowish dots. When magnified a blackish wart is found attached 
to each of the yellow particles, and other warts scattered on the 
crust. “fhe smallness of the granulations and the absence of 
distinct lines distinguishes it from the L. geographicus. Horr- 
man. Crust very-thin, truly mealy black. Tuberclet sitting, 
lentil-shaped, very small, yellowish watery green, smooth, with- 
out any rising or different coloured border. Jacg. coll. ii. 186, 
On rocks, Yorkshire. 2 Ie 'P. Jan.—Dec. 
L. Tubercles brown, border whitish : crust white. 
Hoff. enum. 6.3.-Hoffm. lich, 22. to 4. 
Crust very thin. Tubercles sometimes somewhat convex, 
greenish, giving to the plant a different appearance. Linn. Crust, 
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