100 A LABORATORY MANUAL OF BOTANY 
LESSON LXI 
A comparison of the chief groups of Angiosperms 
The form studied in the last lesson may be the one with 
which comparison is made. Such plants as the lily, tulip, 
water-plantain, Solomon’s-seal, etc., will serve to represent 
the first group of Angiosperms, while such as the buttercup, 
five-finger, innocence, etc., will make good illustrations of 
the second group. 
The Angiosperm division of the Spermatophytes is fur- 
ther subdivided into two groups—the Monocotyledons and 
Dicotyledons. With the specimens furnished, compare a 
representative of each group with reference to the follow- 
ing points, making drawings and notes setting forth the 
distinctive features. 
1. Leaves—How attached to stems; veining; margins; 
alternate or opposite on stems. 
2. Roots.—Bulbous or fibrous. 
3. Stems.—(Cross-sections). Fibro-vascular bundles in 
form of a cylinder or scattered throughout the stem. 
4. Flowers.—Number of cycles composing the flower, 
and number of parts in each cycle. 
In the notes make a summary of the distinguishing 
characters of the two groups of Angiosperms. 
LESSON LXII? 
The remaining lessons take up a’'few prominent families 
of Monocotyledons and Dicotyledons. Several plants are 
suggested in most of the lessons. One of these may be se- 
lected from which to obtain an idea of the family. Very 
brief suggestions as to the work to be done are made. The 
1 If time and material make some work in identification and clas- 
sification possible, such work should be done, following the outline for 
the study of leading groups. 
