THE STUDY OF TYPICAL FLOWERS 195 
which escapes from the anther-cells and adheres to paper or to the 
fingers. Examine a newly opened anther with the microscope, using 
the two-inch objective, and sketch it. 
Cut away all the stamens and note the two portions of the pistil, 
a triangular prism, the ovary, and three roughened scroll-like objects 
at the top, the three lobes of the stigma. Make a sketch of these 
parts about twice natural size, and label them x 2. Touch a small 
camel'’s-hair pencil to one of the anthers, and then transfer the pollen 
thus removed to the stigma. This operation is merely an imitation 
of the work done by insects which visit the flowers out of doors. 
Does the pollen cling readily to the rough stigmatic surface? Examine 
this adhering pollen with the two-inch objective, and sketch a few 
grains of it, together with the bit of the stigma to which it clings. 
Compare this drawing with Fig. 162. Make a cross-section of the 
ovary about midway of its length, and sketch the section as seen 
through the magnifying glass. Label the three chambers shown 
cells of the ovary } or locules, and the white egg-shaped objects within 
ovules.” 
Make a longitudinal section of another ovary, taking pains to 
secure a good view of the ovules, and sketch as seen through the 
magnifying glass. 
Making use of the information already gained and the cross- 
section of the ovary as sketched, construct a diagram of a cross- 
section of the entire flower on the same general plan as those shown 
in Fig. 157.° 
Split a flower lengthwise,* and construct a longitudinal section of 
the entire flower on the plan of those shown in Fig. 155, but showing 
the contents of the ovary. 
207. The Flower of the Buttercup. — Make a diagram of the 
mature flower as seen in a side view, looking a little down into it. 
Label the pale greenish-yellow, hairy, outermost parts sepals, and 
1 Notice that the word cell here means a comparatively large cavity, and is 
not used in the same sense in which we speak of a wood-cell or a pith-cell. 
2 The section will be more satisfactory if made from an older flower, grown 
out of doors, from which the perianth has fallen. In this case label the con- 
tained objects seeds. 
3 Consult also the footnote on p. 193. 
4 One will do for an entire division of the class. 
