TREES AND SHRUBS. 



QTTEBCUS UTAHENSIS, Rydb. 



Quercus utahensis, Rydberg, Bull JN. Y. Bol Gard. ii. 202, t. 25, f. 2 (1901) ; Fl. Colo- 

 rado, 98. — Britton & Shafer, North Am. Trees, 339, f . 297. — Nelson, Coulter, Man. 

 Rocky Mt. Bot. ed. 2, 141. 



Quercus Gambelii, Liebmann, Oversigt Dansk. Vidensk. Selsk. Forhandl. 1854, 169 (not 

 Nuttall). — Sargent, Silva JST. Am. viii. 33 (in part). 



Quercus stellata, var. S utahensis, A. De Candolle, Prodr. xvi. pt. ii. 22 (1864). 



Quercus Douglasii, /3 Gambelii, A. De Candolle, Prodr. xvi. pt. ii. 23 (in part) (1864). 



Quercus alba, var. Gunnisonii, Watson, King's Rep. v. 321 (in part) (1871). 



Quercus Gunnisonii utahensis (Rydberg), Garrett, Spring FL Wasatch Raj. 13 (1911). 



Quercus Gambelii utahensis (Rydberg), Garrett, Spring Fl. Wasatch Reg. ed. 2, 20 (1912). 



Leaves oblong-obovate, gradually narrowed and cuneate or rounded at the base, deeply divided 

 often nearly to the midrib by broad or narrow sinuses into three or four pairs of lateral lobes 

 rounded or acute at the apex, the upper lobes usually again lobed or undulate, the terminal lobe 

 rounded at the apex and entire or three-lobed ; about one-third grown when the flowers open and 

 then light green and covered above by small stellate clusters of hairs and pale and soft-pubescent 

 below, with stellate hairs on the midribs and veins, and at maturity thick, dark green, lustrous 

 and glabrous or nearly glabrous on the upper surface, pale and densely soft-pubescent on the 

 lower surface, from 6 to 16 centimetres long and from 4 to 9 centimetres wide, with prominent 

 midribs and primary veins, and conspicuous reticulate veinlets ; petioles stout, hoary-tomentose 

 early in the season, pubescent or glabrous before autumn, from 1 to 2.5 centimetres in length ; 

 stipules linear-obovate to spathulate, villose, 5 millimetres long, caducous. Staminate flowers in 

 stellate-pubescent aments from 5 to 6 centimetres long ; calyx scarious, villose, divided to the 

 middle by wide sinuses into slender acuminate lobes ; anthers yellow. Pistillate flowers usually soli- 

 tary or in pairs, their involucral scales thickly coated with hoary tomentum. Fruit usually solitary, 

 sessile or raised on a stout pubescent peduncle from 6 to 12 millimetres long ; cup hemispherical, 

 usually from 2 to 2.5 centimetres wide, pale pubescent on the inner surface, the scales broadly 

 ovate, covered with pale pubescence, much thickened on the back and closely appressed below the 

 middle of the cup, gradually reduced in size upwards, thin and less closely appressed toward its 

 rim bordered by the small free projecting tips of the upper row of scales ; acorn ovoid to ovate, 

 broad and rounded at the ends, enclosed for about one-half its length, from 1.5 to 1.8 centi- 

 metres long. 



A tree, occasionally 10 metres high, with a trunk from 1.5 to 2 decimetres in diameter, 

 covered with dark rough scaly bark, stout erect branches forming a narrow open head, and stout 

 branchlets red-brown and stellate-pubescent when they first appear, becoming light orange- 

 brown and puberulous during their first season. Flowers the end of May or early in June. Fruit 

 ripens in September or October. _ . . 



Dry slopes of the foothills of the southern Rocky Mountains from southwestern Wyoming to 



i « Quercus utahensis scarcely reaches Wyoming, but it is rather abundant just on the line bet 

 southern Wyoming. One of the points at which it has been secured several times is at Bag 

 very close to the Colorado line." Aven Nelson in litt. 



