The Trees of Wyoming. 



95 



(5) ASPEN. 



(Popuhis trenmloides Michx.) 



Description. Leaves small, broadly 

 ovate or rounded, abruptly short pointed, 

 finely toothed on the margins, leafstalks 

 flattened latterally causing them to tremble 

 in the slightest breeze: buds short and thick- 

 ened (see Plate XX, Fig. 2): somewhat 

 crowded at the ends of the twigs: bark 

 smooth except in very old trees. 



Found in abundance in those 

 parts of the state where hills or mountains abound. It 

 occurs as thickets or groves on the slopes where snow- 

 drifts form and on the banks of mountain streams. Our 

 illustration shows a characteristic location and a typical 

 Aspen grove. The trees are usually small but in very 

 favorable situations may attain a height of 50 feet or 

 more. 



The long, slender, pole-like trunks are used more or 

 less for fencing, and as fuel are not to be despised. 

 Transplanted from the grove and set out singly they 

 grow but slowly and never form shapely trees. 



6. WILLOW. 



[Sattx) 



Perhaps no other state in the United States possesses 

 so many different kinds of willows as Wyoming. Mr. M. 

 S. Bebb (now deceased), the greatest authority on wil- 

 lows in recent times, in a letter to the writer a few years 

 since emphasized "Willow State" as a suitable name for 

 Wyoming. In spite of the large number of species found 

 within our borders we have very few that attain tree-like 

 size. Most of them are mere shrubs, forming great 



