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easily recognised by the structure of its 
flower. The garden hibiscus, so much in 
demand for its showy flowers of varied hue, 
is a good type and owing to its large size 
easily examined. Some of our common weeds 
belong to the order as well as the ochro, the 
sore], the cousin rnaho and other well-known 
plants. You may see here one advantage 
of a knowledge of plants No plant of the 
order of mallows is poisonous and if one can 
certainly recognize a plant as belonging to 
the order he maybe safely assured of its 
nou-poisonous properties. Most persons re 
cognize the difference between exogens and 
endogens without much difficulty though 
there are some plants which at first sight 
seem not easy to place. There is no difficulty 
when we come to deal with orders especially 
of exogens. The order of mallows, of which 
1 have just said something, is easily distin¬ 
guishable by its flowers. Another order -the 
melastomas—has a very’characteristic vena 
tion of its leaves whereby one can 
scarcely fail to recognize at sight a 
plant of this order. With very 
little practice a plant of the bean order 
is readily known by its fruit or flower 
though some, like the Angelin, have a fruit 
not immediately recognizable as being like 
that of a pea. The foliage of plants of this 
order is very diverse in structure and if the 
pinnate form is often characteristic it may lie 
said that there are many exceptions ; and 
when we come to sub orders like those of 
Mimosa and Caesalpinia the characters of the 
flowers may be puzzling. A very remarkable 
plant which we sometimes lind growing on 
waste or abandoned land is possessed of a 
feature which recommends it to not ice : it has 
the property of developing young plants 
from the margins of its leaves. The name of 
this plant is Kryophyllum-and that 1 bad 
much trouble to find out—it is commonly 
called “ Wonder of the World," but that is a 
name 1 have not found in any book Few 
plants have this property of producing yuan.-, 
plants from the margins of its leaves, and 
this is remarkable from its physiological 
and embryological portent. The ovary of a 
plant which in most cases becomes the ftuil 
or forms part of the fruit is made up of one 
or more carpels, as the botanist calls them. 
These carpels are modified leaves and bear 
upon their edges just as this Bryoph.vllum 
does growing points which, when the ovary 
is developed, take the form of ovules ai d 
these when fertilized by the pollen In . ome 
the seeds from which future plants are 
developed. If you could fold the margins of 
