336 Class XXI. Order IX. 



The Larch is a fine tree, differing remarkably from the 

 Pines, already mentioned, in its leaves, which fall at the ap- 

 proach of winter. They grow in tufts or fascicles, on the sides 

 of the branches, which are mostly horizontal. The tree flow- 

 ers with small aments, the barren ones containing two anthers 

 under each scale, and the fertile ones two germs. These last 

 are succeeded by small cones, with soft scales, inflected at the 

 edge. Seeds small, winged. This tree attains the height of 

 eighty or ninety feet. Its wood is strong and durable, and is 

 used in ship building. It frequents a low, moist soil. 



270. CUPRESSUS. 

 CUPRESSUS THUYOIDES. L. White Cedar. 



Brauclilets compressed ; leaves in four rows, 

 imbricated, ovate, tuberculated at base. Willd. 



The YV hite Cedar grows naturally in wet situations, some- 

 times occupying considerable tracts of marshy land, known by 

 the name of Cedar swamps. The small branches are finely 

 subdivided, .th-iir last divisions compressed, and covered by four 

 rows of short, minute leaves, the two lateral rows longest. Each 

 leaf is furnished with a minute tubercle or gland on t'ne back, 

 near its base. Cones extremely small, angular, and somewhat 

 spherical* 



The wood is light, soft, and very durable. It is used for 

 shingles, for wooden vessels, also for fencing and other purpos- 

 es where durability is required. This tree and the last are 

 found occasionally, but not frequently, in the neighbourhood of 

 Boston. 



271. ACALYPHA. 

 ACALYPHA VIRGINICA. L. Three seeded Mercury. 



Pubescent, leaves on short petioles, lance-ob- 

 long, serrate ; involucres subsessile, axillary, nerv- 

 ed, cut into acute, crested segments, Mich, abr, 



