CLASSIFICATION. 



119 



Bibliography: British : — Turner andBorrer, Liclienographia Britannica : 

 Smith's English Flora, vol. v. : Hooker, Flora Scotica ; Brit. Flora, vol. ii. : 

 Mackay, Flora Hibernica : Lightfoot, Flora Scotica : Greville, Flora Edinensis : 

 Johnston, Nat. Hist, of Eastern Borders — Botany : Lindley's Vegetable King- 

 dom : Burnett's Outlines of Botany : Edinburgh Encyclopaedia, Art. e Lichens.' 

 Foreign : — Schserer, Lichenum Helveticorum Spicilegium, 1823 to 1840 : 

 Fries, Summa Vegetab. Scandinavian, 1846 : Acharius, Methodus, etc., 1803 : 

 Lichenographia Universalis, 1810 : Synopsis Lichenum, 1814: Prodromus 

 Lichenographise Suecicse, 1798 : Linnaeus, Systema Vegetabilium, 1769 : Flora 

 Lapponica : Eschweiler, Systema Lichenum, 1824 : Sommerfeld, Flora Lap- 

 ponica : Wahlenberg, Flora Lapponica: Dietrich, Lichenographia Germanica, 

 oder Deutschland's Flechten : Korber, Systema Lichenum Germanise : Wall- 

 roth, Flora Cryptogamica Germanise, 1824 : Schwartz, Lichenographia Ameri- 

 cana : Chevalier, Flore des Environs de Paris : Lamarck and De Candolle, 

 Flore Francaise, 1803. 



SYNOPSIS OF THE NATURAL ORDEES AND 



GENEEA. 



I. GYMNOCARPI. 



(According to Schserer.) 



Nat. Ord. I. Usneaceje. 

 Genus 1. Usnea. 



4. Physcia. 

 III. Cetrariace^;. 



1. Cetraria. 

 IY. Peltideace^g. 



ii. cornictjlariaceie. 



1. cornicularia. 



2. roccella. 



3. Eamalina. 



1. Nephroma. 



2. Peltigera. 



