OAKS OF PACIFIC SLOPE. 157 



Leaves obovate, 2 to 5 inches long, acutely lobed, pubescent 

 below; nut oblong, large, 1 to 1} inches long, cup shal- 

 low. A small shrub. Brewer Oak. 4. Q. Breweri. 

 (2) Coarsely sinuate-toothed. 



Leaves oval to obovate, thick, coriaceous, pale below; persisting 

 during the winter. A low shrub. Sadler Oak .... 



5. Q. Sadleriana. 

 ** Leaves blue-green and small. 



Oblong, sinuate-dentate, entire or lobed, or spinescent-toothed, 

 1 to 2 inches long, glaucous above, pubescent below; nut 

 small, ovate, to 1 inch long. Rocky Mt. Oak 



6. Q. undulata. 

 Oblong, entire or sinuate-lobed, conspicuously light-blue above, 



pubescent below; nut large, oblong or ventricose, to 1 

 inches long. Blue Oak, Douglas Oak. 7. Q. Douglasii. 



(b) Leaves mostly persistent until the following spring. (Evergreen Oaks. ) 

 * Leaves blue-green. 



Oblong or obovate, usually obtuse and rounded at apex, entire 

 or remotely dentate; nut ovate, f to 1 inch long, Ever- 

 green or Englemann Oak 8. Q. Engelmanni. 



Ovate or oval, usually cordate at base, entirely or remotely 

 spinulose-dentate; nut small, ovate. Oblong-leaf Oak . 



9. Q. oblongifolia. 



Oblong to broadly-obovate, cordate or rounded at base; spinose 

 dentate, reticulate-venulose below; branchlets thick, 

 rigid; nut small, nearly globular, inch long. Arizona 



White Oak 10. Q.Arizonica,n.8p. 



Broadly obovate. cordate, usually rounded and obtuse at apex ( 

 repandly spi nose-dentate, coarsely and conspicuously 

 reticulate-venulose below; nuts spicate, on long, slender 



peduncles, small, \ inch long. Net-leaf Oak 



11. Q. reticulata. 



Ovate-oblong or oval, small, to 1 inch long, acute at apex, 

 entire or remotely spinose-dentate; branchlets rigid; nut 



small. New and rare. Tourney Oak 



12. Q. Toumeyi, n. sp. 

 ** Leaves dark green. 



Oblong or obovate, small, entire or sinuate-toothed or lobed, 



pubescent and often pale below; nut small, ovate or 



oblong, to 1 inch long. Scrub Oak. 13. Q. dumosa. 



Oblong-lanceolate, entire or repand-serrate, coriaceous; nut 



small, narrow, and long, f to 1 inch, edible. Emory Oak, 



" Biotes." 14. Q. Emoryi. 



II. Maturation biennial; nut silky-tomentose within; abortive ovules basal or 

 lateral. 



(c) Leaves persistent. (Live Oaks.) 



Oblong acute or cuspidate, entire, or dentate, or sinuate-toothed, 

 fulvous- tomentose, ultimately pale on lower surface; nut 

 oblong, 1 to 2 inches long, scales of cup usually clothed 

 with short, stiff yellow hairs. Canyon Live Oak, Maul 

 Oak 15. Q. c.hrysolepis. 



