STUDY 12. 
A MOSS PLANT. 
A. Vegetative and Reproductive Stages. 
1. 
2. 
11. 
Where are these plants found ? 
With m. study the parts of a single plant, to find its 
rhizoids, stem, and leaves. How do they differ in 
size, form, and color ? 
Are the plants free or united with each other? What 
evidence is there for your observation ? 
The erect stalk (seta) at the summit of a leafy shoot 
bears a spore case (capsule) at its distal end. Is 
the seta firmly or loosely attached? Why? 
Is there a little cap (ealyptra) on the distal end of 
the capsule? What is its origin? 
Draw (del. 3 in.) a single specimen and designate 
known parts. 
With l.p. study each part ; draw rhizoids and leaves 
and describe. 
Remove the calyptra and observe with m. a little lid 
(operculum). What is its use? 
Draw the structures studied in 4, 5, and 8. 
. Split a capsule lengthwise, and with m. study the 
position and attachment of the inclosed sporan- 
gium, and find its contents, the spores. 
Draw and describe. 
B. Life Problems. 
1. 
What advantage is there in so many growing to- 
gether? 
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