Oct.. 1914-Mar., 191S 



Illustrations vil 



Page. 



Plate XIII. Fig. i. — Dense stand of lodgepole pine, with undergrowth of red 

 huckleberry {Vaccinium scoparium). Canadian zone (lodgepole-pine 

 association). Fig. 2. — A flat eminence in the Hudsonian zone, showing the 

 characteristic clumped growth of whitebark pine and Alpine fir. Fig. 

 3. — Irregular topography of the upper grazing lands. Hudsonian zone 

 (whitebark-pine association) 148 



Plate XIV. Fig. i. — Arctic-Alpine and upper-subalpine region, where forage 

 is sparse, due to poor soil, short growing season, and unfavorable climate. 

 Fig. 2. — Mountain range lands prior to the beginning of growth and germi- 

 nation. Fig. 3. — Same view as shown in figure 2, but more in detail, 

 showing the condition eight days later (June 30) 148 



Plate XV. Fig. i. — Gantrast in the progress of the flower stalk production 

 of mountain bunch-grass on portion of range which has been completely 

 closed to grazing for a period of three successive years and on range which 

 has been subject to continued early grazing. Fig. 2. — Western porcupine 

 grass (Stipa occidentalis) , showing empty glumes and floret with the scale 

 and its awned projection to the left; to the right the floret with glumes 

 removed, showing the sharp-pointed, slightly curved seed tip. Fig. 3. — 

 Average development of the root system and aerial portion of mountain 

 bunch-grass at end of the first growing season 148 



Plate XVI. Mountain bunch-grass, showing root development and aerial 



growth at the end of the second season 148 



Plate XVII. Mountain bunch-grass in the spring of the third year of growth 

 just before producing flower stalks, showing the natural position and length 

 of the elaborate root development and aerial growth 148 



Plate XVIII. Mountain bunch-grass at the end of the third year, showing 



three flower stalks and inflorescence 148 



Plate XIX. Sickle sedge {Carex umbellata brevirostris) , showing offshoots from 



the rootstocks and flower stalks with fruit in the process of development . 148 



Plate XX. Fig. i. — Station 4 on Stanley Range as it appeared on July 12, 1907. 

 Fig. 2. — View of station 4 on July 15, 1909, after two years' protection from 

 grazing animals. Fig. 3. — View of tfuadrat i, established on July 10, 1907. 148 



Plate XXI. Fig. i. — Quadrat i, as it appeared on July 16, 1909. Fig. 2. — 

 Area of mountain bunch-grass closed to grazing animals on July 8, 1907. 

 Fig. 3. — View of open range contiguous to area shown in figure 2 148 



Plate XXII. View of plot in the Transition (yellow-pine) zone which has been 

 protected from grazing animals for three successive years, showing contrast 

 in carrying capacity with contiguous open range 148 



Plate XXIII. Fig. i. — View of portion of allotment at medium elevation 

 where the destruction of forage seedlings due to grazing and trampling 

 was studied. Fig. 2. — Dense stand of smooth wild rye {Elymus glaucus) 

 and short-awned brome-grass (Bromus marginatus) seedlings 148 



Pecan Rosette 



Plate XXIV. Fig. i. — One normal pecan leaf and two leaves with rosette 



from Dewitt, Ga. Fig. 2. — Pecan shoot with early symptoms of rosette. ... 174 



Plate XXV. Resetted pecan leaf showing perforations due to the failure of 



part of the mesophyll to develop 174 



Plate XXVI. Fig. i. — Pecan shoot in advanced stages of rosette. Fig. 2. — 



Normal pecan shoot for comparison with rosetted shoot 174 



Plate XXVII. Fig. i. — Young orchard pecan tree with a moderate attack of 

 rosette on the left side and seriously dying back from the disease on the 

 other side. Fig. 2. — Young orchard pecan tree in advanced stages of 

 rosette 174 



