

REVIEWS. 269 
Some of the rarer plants observed first by Lhwyd in Wales, 
are Gnaphalium margaritaceum, Linn., and Adiantum Cap.-Ven. ; 
but the most important of Lhwyd’s contributions to botany is 
his discovery of Lioydia serotina, a plant limited to Carnarvon- 
shire; for it has not hitherto been detected anywhere else in 
Britain : it is found on the Alps and Pyrenees. 
The most important contribution to our knowledge of the 
botany of North Wales is from Dr. Richardson, of North 
Bierley, Yorkshire, who sent a list of plants to Dr. Sherrard: 
its date is supposed by Mr. Turner to be 1726. The interesting 
plants named in this communication are the following: Subu- 
laria, near the old castle (Dolbadern), also the Cambrian Poppy, 
Lobelia Dorimanna, Isoetes lacustris, and Hymenophyllum tun- 
bridgense, all near Llanberis. Lycopodium annotinum is said to 
have been gathered by Lhwyd, “yet,” says the. Doctor, “ when 
I was with him we could not find it.” This was on the Great 
Glyder: he adds, “ On the same rocks you'll find Galium boreale 
(we gave the modern names to save our readers trouble and to 
economize space); at Twll Du Lloydia’serotina, Silene acaulis, 
Gnaphalium dioicum, Saxifraga oppositifolia, 8. stellaris, Epilo- 
bium angustifolium at the mountain-top, growing out of a fissure. 

Webiewos, 
A Monograph of the British Graphidee. By the Rev. W. A. 
Leieuton. Reprinted from Ann. and Mag. Nat. Hist., ser. ii. 
vol. xii.: 1854. Only 100 separate copies printed. 
We have much pleasure in commending this Monograph to the 
attention of our readers, who, we are assured, will unite with us 
in thanking the reverend author for this disinterested and addi- 
tional contribution to the knowledge of British botany. One of 
the results of Mr. Leighton’s diligent and successful investigations 
into this difficult portion of our national Flora is the addition of 
many new species to this tribe, and the better determination of 
such as were formerly known. The learned author of the ‘ British 
Flora’ describes two British genera as comprehended in Gra- 
phidee ; Mr. Leighton includes nine genera. The genus Graphis, 
Ach., includes several species of the genus Opegrapha of our more 
