SCIENCE OF BOTANY. 
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CLASS XXIII. POLY GAM I A The term signifies plurality 
of marriages. This class produces, either upon the same or different 
plants, hermaphrodite flowers, and also flowers of one sex only, be 
it male or female ; or flowers of each sex ; and the latter receiving 
impregnation from, or giving it to the hermaphrodites, as their sex 
happens to be : the parts essential to generation in the hermaphro- 
dite flowers do not confine themselves to the corresponding parts 
within the same flower, but become of promiscuous use : which is 
the reason of giving this title to the class. 
CLASS XXIV. CRYPTO GAM I A. — The term signifies con- 
cealment of marriages ; this class consisting of such plants as either 
bear their flowers concealed within the fruit, or have them so small, 
as to be imperceptible. 
CLASS XXV. Palm®, Palms. 
Explanation of the Titles of the OitDEits. 
The titles of the orders have been already given. It remains 
therefore to explain them. 
CLASS I. to XIII. inclusive. — The orders of the first thirteen 
classes take their denominations from the number of the Pistillum, 
or female part of the plant, which is usually reckoned from the base 
of the style, if there be any : but if the style be wanting, the num- 
ber is fixed from the stigmata. The Greet word, compounded with 
the numerical term in the titles of these orders, signifies a wife : 
Monogynia implies one wife, or one style ; Digynia, two styles ; 
Trigynia, three ; Tetragynia, four ; Pentagynia. five ; Hexagynia, 
six ; Decagynia, ten ; and Polygyrnia, many. These are the titles 
that occur in the orders of these thirteen classes ; and this general 
explanation of them will be thought sufficient, as from the table it 
appears how they are employed in tire classes. 
CLASS XIV. DIDYNAMIA. — Of the three orders of this class 
the two first are founded on a distinction in the fruit. The title of 
the first order, Gymnospermia, is expressive of such plants as have 
naked seeds; and that of the second, Angiospermia, of such as have 
their seeds in a vessel or pericarpium. The third order, Polypetala, 
is expressive of such plants as have many petals : this order seems 
to have been established in favour of one genus of plants only, the 
Melianthus, the flowers of which are Polypetalous, though those of 
all the rest of this class are Monopetalous. 
CLASS XV. TETK ADYNAM IA . — The tu'o orders of this 
class are founded on a distinction in the Pericarpium. In the first 
order, Siliculosa, the Pericarpium is a Silicula, little pod; which 
differs from the Siliqua or pod in being round, and having the apex 
of the dissepiment , which had been the style, prominent beyond the 
valves, often so far as to be equal in length to Silicula. In the 
second order, Slliquosa, the pericarpium is a Siliqua, which is long 
and without any remarkable extension of the style. 
CLASS XVI. M ON ADELPHi A. XVII. DIADELPHIA. 
