394 
NATURAL HISTORY. 
Adonis, Bird’s eye, Illicium, Ranunculus, Crow-foot, Trollius, 
Globe Ranunculus, Isopyrum, Helleburus, Black Hellebore, Caltha, 
Marsh Marygold, Hydrastis, Yellow Root, Houtuynia, Unona, and 
Wintera. 
Of the fourteenth Class, Didynamia. 
This class consists of such plants as bear hermaphrodite flowers, 
furnished with four stamina ; two of which are longer than the rest. 
This circumstance would suffice to distinguish it from the fourth 
class, in which the four stamina are equal : however, as the flowers 
of this class have a particular structure, there are general characters 
which will nearly serve for the whole class ; and these we will give 
at length. 
Characters of the Class, Didynamia. 
Calyx. — A perianthum, monophyllous, erect, tubulate, quln- 
quefid, with segments for the most part unequal, and persisting. 
Cokolla, — Monopetalous and erect, the base of which contains 
the honey, and does the office of a ncctarium. The upper lip 
straight : the lower spreading and trifid. The middle lacinia the 
broadest. 
STAMINA. — Four filaments, subulate, inserted in the tube of 
die corolla, and inclined towards the back thereof. The two inner 
and nearest the shortest. All of them parallel, and rarely exceed- 
ing the length of the corolla. The anther® lodged under the 
upper lip of the corolla in pairs ; in each of which respectively the 
two anther® approach each other. 
PISTILLUM. — The germen commonly above the receptacle. 
The style single, filiform, bent in the same form as the filaments, 
usually placed within them, a little exceeding them in length, and 
slightly curved towards the summit. The stigma for the most part 
emarginate. 
PERICARPIUM. — Either wanting (see the first order) or, if 
present, usually bilocular (see the second order). 
SEEDS. — If no pericarpium, four, lodged within the hollow of 
the calyx, as in a capsule ; but if there be a pericarpium, more 
numerous, and fastened to a receptacle placed in the middle of the 
pericarpium. 
The flowers of this elass are for the most part almost upright, 
but inclining a little to an acute angle from the stem, that the 
corolla may more easily cover the anther®, and that the pollen may 
fall on the stigma, and not be soaked with the rain. The essential 
character is in the four stamina; of which the two nearest are 
shorter, and all four close to each other, and transmitted with the 
single style of the pistillum through a corolla that is unequal. 
The orders of this class are two, viz 
