ILLUSTRATED GUIDE. 



65 



sandy soils -with a clay subsoil. Plains of arid sand may 

 be advantageously planted with this tree, the- seed of 

 ■^hich takes eighteen months to ripen; it is 

 collected in autumn and sown in spring, 

 placing not more than half an inch of earth 

 upon it. Germination takes place, generally, 

 in thirty days, but, occasionally, the plant re- 

 mains invisible for twelve months. A pound 

 of white-pine seed contains ten thousand pickles, and 



40. — Winged 



seed of Amexi- 



can larch 



41 — ^Pinus strobus — ^Weymootli, or white-pine. 



a pound of red-pine seed, forty thousand. They grow 

 very quickly, and may be set out in the nursery two 

 years from the seed. When the time of final transplan- 

 tation arrives, they shotdd be planted at a distance of 

 eight feet, every way from tree to tree, and the vacant 



