22 



frozen. They must not be allowed to become moist. Sow in fur- 

 rows six to eight iuclies a^jart and two or three inches in a furrow. 

 They will be of sufficient size in two ^'^ears to be moved safely. They 

 may then be mixed with seedlings of ash, elm, oak, pine, spruce, etc., 

 at four foot distances. 



Prunus Pennsylvaniaca, L. fil., or the fire cherry, is of little value 

 other than as a nurse tree to better and weaker species. It may be 

 used as the box elder. Propagation is the same as for the black 

 cherry. The fruit is ripe in July. 



AMERICAN CRAB APPLE. 



Pyrus coronaria, L. 



Mains coronaria, (L.) Mill. See Britton & Brown, Vol. II, p. 235. 



The tree never reaches a very great size and its wood is of little 

 value except for tool handles or turnery work. As an ornamental 

 tree, however, it is worth some consideration. Its flow^ers are numer- 

 ous, fragrant and of delicate tints. The fruit matures late in fall, 

 when it may be gathered and macerated in water in order to obtain 

 the seeds. Several years in the nursery may be required before the 

 seedlings will be large enough to be planted out with safety. Prun- 

 ing may be necessary in order to avoid a straggling form. It is 

 usually found in rather moist soil. 



MOUNTAIN ASH. 



Pyrus Americana, DC. 



Sorbus Americanus, Marsh. See Britton & Brown, Vol. II, p. 233. 



Of no value other than as an ornamental tree. It grows both on 

 highlands and on lowlands. The berry-like fruit grows in clusters 

 and matures about October. The seeds may be obtained by macera- 

 tion, and after being dried on a cloth should be kept in a dry, cool 

 place for spring planting. Frequent transplanting before setting 

 out permanently will no doubt secure the best results for ornamental 

 use. 



