EXOGENS. 



tribe, and similar plants. These conifers are gener- 

 ally large trees or evergreen shrubs, and furnish 

 much valuable timber, 

 pitch, turpentine, and 

 resin. (Fig. 34.) 



2. Those whose seeds 

 are contained in an ova- 

 ry, as the Amaranth, 

 Buckwheat, Laurel, Net- 

 tle, Fig, and the Catkin- 

 tearing family. This 

 latter family is the most 

 important of this order, 

 since it contains the most 

 important timber - trees, 

 as the Alder, Birch, Wil- 

 low, Poplar, Oak, Chest- 

 nut, etc. Their flowers, 

 either male or female, 

 are arranged on a com- 

 mon axis, without sepa- 

 rate stalks, and are with- 

 out either calyx or corol- 

 la, but furnished only 

 with scaly bracts. Such 

 clusters, or catkins, at- 

 tract attention in early spring to the willow, alder, or 

 poplar trees. This family, with the Conifers, give* 



