12 



THE PARTS OF THE SEEDS. 



5. Milum, an external mark or scar on the seed, where it was 

 fastened within the fruit. 



6. Arillus, the proper exterior coat, or tunic of the seed, 

 which comes off of itself. > 



7. Cqronula, the little crown of a seed, which is either Caly- 

 culus, the calyx of a floret, adhering to the seed, and assisting 

 it to fly, or Pappus, a down, which is a feathery, or hairy crown, 

 answering the same end, and connected with the seed by Stipes, 

 a trunk*, which here signifies a thread on which the down is 

 raised and supported. 



8. Ala, wing, a membrane affixed to the seed, and which by 

 its flying helps to disperse it. 



9. Nux, a nut, which is a seed enclosed with an osseous epider- 

 mis, a bony or hard outer skin, commonly called the shell. 



10. Propago, which is the seed of a moss, first discovered by 

 LinnaBus, who peeled off the bark, and detected it in the year 

 1750. These seeds have neither tunic nor cotyledon, but con- 

 sist only of the plumula of a naked corculum, where the rostel- 

 limi is inserted into the calyx of the plant. 



* Sometimes, however, this part, the stipes, is wanting, and the pappus is imme- 

 diately connected -.nth the seer!, when, like the anther and stigma, it is termed sessile. 



Editor. 



