CRYPTOGAMIA. ALGA&. Lichen. 1. Root central. 63 
St. Vincent’s Rocks near Bristol. Dare. in Dill.—About 
Lianberris. Mr. Davies. « P, Jan.—Dec. 
L. Tubercles* black, numerous : foliage grey, consisting polyrhi'zos. 
of several leaves with an even surface on both sides, - 
but with numerous black fibres underneath. 
_ Hoff. lich. 2. 3 and 4-Hall, enum. 2. 4, at p. 91; bist. 47. 
4, at ill. p, 88—Dill. 30. 130, and 82.5, avery large 
plant—Fl. dan. 597.1. 
Foliage more rigid and more upright than in the L. poly. 
phyllus, the edge less regularly scolloped, more black under. 
neath, and thick set with short black tendrils. In other re- 
spects resembling that, and has like that dots upon the leaves, 
but more distinct. Dist. Plant circular, expanded, thick, 
some inches over, edge curled, irregularly nicked and scoll 
Surface wrinkled or plaited, grey white, sprinkled with minute 
dantsaenuhtaietrasis » sometimes powdery, sometimes smooth, 
Under side very black, closely set with short forked tendrils ; 
root central. Horrman. ~Fructifications numerous, black, and 
as Dillenius describes them, * surrounded with a margin and 
tubercled in the centre.” Mr. Retuan. Besides the black 
fibres ath, -it has a central root, which being broken off 
leaves the bare place figured by Hoffman. : 
This last author doubts whether his be the plant of Linnzns, 
but I think without much reason. Dr. Smith says that L. po- 
lyrhizos and L. velleus are one and the same plant. ~ ‘ig 
L. velleus. Huds. In the same places with L. polpphillus. 
Dirt. On rocks in the Highlands, Licurr. and Lowlands. 
~ Dr. Burexss. Clark’s park and paradise near Money Musk, 
eenshire. [Carnedd Llewellyn, near the summit. On the 
top of a high hill called Moel Shabéd near Capel Cerrig ; Caer- 
narvonshire. Mr. Grirrirn.]. = 
_L. Saucers black, flattish : foliage grey brown, consisting pustula'tus. 
of a single leaf, circular, slighily lobed, sorickled 
with a black bran-like powder ; pitted underneath. 
* Hoffm. lich. 28, 1. 2-29, 4—Dill. 30. 131-Fl. dam. 597. 2- 
Mich, 47-Vaill. 20. 9. va 
Root single, central, of a stony consistence. Leaf single, 
concave, circular, 2 to 5 inches over, thin, membranaceons, | 
broad, shallow, deeper in the old plant, covered with numerous 
- pustules, round or oblong, hollow, opening under the leaf. Plant 
— yellow to blackish underneath. Substance white.’ Drtt. 
aucers very rare, only found on the very largest plants, amongst 
the pustules, circilary black, Ratish + border thin, of the same 
colour. Plant flexible when wet, brittle when dry, Horrm. 
