
9() THE GROWTH AND PARTS OF PLANTS 
carefully, the embryo plant remains attached to one of 
them. Sketch this, as well as the embryo of the bean; 
- compare them and indicate in the draw- 


ings the names of the parts. 
The parts of the marrow seed. The 
| | scar on the marrow seed is found on 
vie, 37. Marrow the smaller end. The seed coat can be 
seed split open; in 
right-hand haf split by cutting carefully part way 
the papery covering 
chown which sur. around the edge of the flattened seed 
rounds thesmes" and then prising it open. The “ meat” 
inside is covered with a very thin papery layer. The 
pointed end of the meat is the cawlicle (root and stem). 
It lies, as we see, in the small pointed end (> 
of the seed coat. The meat is in halves, (SX 
as shown by a “split” which runs through 

to the point where they seem to be joined. ric. 3s. "Meat 
These halves of the meat are the cotyledons ie oe 
of the marrow. Prise them apart so that a 
one is broken free. At this junction of the 
cotyledons will be found a tiny bud on the 
end of the stem attached to one cotyledon 
after the other is broken off. The stem 1s 
Fig. 39, Long Very short in the marrow plantlet. We have 
ema found in the pea and bean that it lies be- 
seed. ~~ tween the cotyledon and the root. So it 
does in the marrow. Is it so in all seeds? 
Cut a marrow seed through the cotyledons, but 

