AMONG THE WILD FLOWERS. 69 
these plants are, in our British species, all pea- 
shaped. 
Compare also with these two Classes the 
Linn. Cl. XVIII., Polyadelphia, in which the 
stamens have their filaments united in several 
groups, which are very ornamental in the 
centre of the flowers of the only genus we 
possess of this class, Hypericum, St. John’s 
Wort. Thus you have a view of three more 
of the Linnzan Classes, not previously 
mentioned, namely, Monadelphous plants, 
Cl. XVI., as above described; Diadelphous 
plants, Cl. VIII., including Fumitory, Milk- 
wort, Broom, Furze, Vetches of several 
genera, Clovers in 20 species, and others ; and 
Polyadelphous plants, of the genus Hyperi- 
cum. 
The beauty and elegance of the plants of 
these three Classes render them very attrac- 
tive. It may be remarked that the so-called 
Geraniums of the greenhouse and garden are 
Pelargontums, chiefly coming from the Cape 
of Good Hope, as well as many species of 
true Geranium. Australia also has the Pelar- 
goniums. A prominent mark of distinction 
between a Geranium and a Pelargonium is, 
