ch. XX.] CLASSES AND ORDERS. 119 
Crass 1.—Monanpria.* One stamen. 
It contains two orders. 
507. The first order of the first class is Monogynia, or one 
pistil. There are few plants in this class; the genus Hippu- 
ris, or mare’s tail, which grows in water and marshes, and is 
therefore aquatic, belongs here. It is considered a perfect flower, 
because it has a stamen and pistil, though it has neither calyx 
nor corolla. 
508. Look at Fig. 72, and you will 
see at a, that the stem is erect and 
simple; the leaves linear, acute, and 
growing in whorls. 
At b, is a representation of a flow- 
er of this plant as seen through a mi- 
croscope; the germ is egg-shaped ; 
the style is long and awl-shaped ; the 
stigma is small and pointed; the an- 
ther is large, and connected to the germ 
by a short filament. 
You must study the explanations 
and look at the figure until you can 
tell the different parts as represented. 
and is prepared by wetting it first with a little cold water, and 
_ then pouring upon it boiling water in the same manner as for 
making starch. 
510. The Ginger is botanically called Zinziber, a name 
* Here the pupil can consult pages 24 and 25, where he will find that 
Monos is the Greek for one, and andria for stamen ; therefore the Ist 
class is called Monandria, because it has one stamen. For an expla- 
nation of the names of the orders, he must look toChap. V. It isre- 
commended to the teacher toexamine the pupil closely upon the classes 
and orders, and especially the derivation of the terms by which shey 
are designated. 
~ wt 
507. What is said of the Ist order of the class Monandria? 
508. What does Fig. 72 represent ? 
509. What is said of the Arrow-root ? 
510, What is said of Ginger ? 
