BEECH FAMILY 



519 



6. Quercus breweri Engelm. 

 Brewer's Oak. Fig. 1257. 



Quercus lobata fruticosa Engelm. Trans. St. Louis 



Acad. 3: 389. 1876. 

 Quercus breweri Y-ngeXm. liot. Cs\\i. 2: 96. 1880. 

 Quercus garr\ana breweri Jepson, Fl. Calif. 1: 354. 



1909. 



A shrub, 1-5 m. high, with smoothish 

 gray bark, and sHghtly pubescent twigs ; 

 winter buds brown, ovate, 2-4 mm. long, 

 sparsely puberulent. Leaves 5-12 cm. long, 

 pinnatifid to the middle, the lobes obtuse 

 or acute, entire or toothed, finely pubescent, 

 at length nearly glabrous and shining above, 

 pale beneath and often velvety pubescent : 

 cup shallow, somewhat tuberculate, 12-20 

 mm. broad ; init oval, obtuse, about 20 mm. 

 long. 



Mountain slopes, Upper Sonoran to Canadian 

 Zones; the typical form inhabits the high altitudes 

 of the Siskiyou and Mt. Shasta regions. On the 

 western slopes of the Sierra Nevada at middle ele- 

 vations a form with less tuberculate scales occurs 

 from Tuolumne County southward to the Kaweah 

 Basin. This has been described as (Quercus 

 garryana senota Jepson, loc. cit.) and may prove 

 distinct. Type locality: "mountains west of 

 Shasta." 



7. Quercus douglasii Hook. & Arn. 

 Blue Oak. Fig. 1258. 



Quercus douglasii Hook. & Arn. Bot. Beech. 391. 1S41. 

 Quercus ransomi Kell. Proc. Calif. Acad. 1: 25. 1855. 



A tree usually 10-20 m. high, with a trunk 5-12 

 dm. in diameter, and a dense round-topped crown; 

 young twigs hoary tomentose ; bark shallowly 

 checked into light gray scales. Leaves deciduous, 

 5-12 cm. long, oblong, with broad shallow lobes 

 appearing like undulations on the margin, or some- 

 times rather deeply lobed, blue-green above, pale 

 beneath, prominently veined and pubescent ; acorn cups 

 shallow, 10-12 mm. broad, the scales thickened; nu*" 

 oval, 20-25 mm. long, narrow at base, acute at apex, 

 tomentose. 



Ury rocky hillsides. Upper Sonoran Zone; head of Sacra- 

 mento Valley south through the Sierra Nevada foothills and 

 the Coast Ranges to the Sierra l.iebre Mountains, Los An- 

 geles County. Type locality: California, locality not indi- 

 cated. 



8. Quercus engelmanni Greene. Englemann's Uak. Fig. 1259.. 



Quercus eugelmanni Greene, W. Am. Oaks i?i. 1889. 

 Quercus macdonaldi elcgantula Greene, W. Am. Oaks 

 26. 1889. 



A tree 15-20 m. high, with a trunk 0.5-1 m. 

 in diameter, and spreading branches forming a 

 broad rounded or irregular head ; young twigs 

 hoary tomentose; bark divided by narrow fis- 

 sures and covered by thin appressed scales. 

 Leaves evergreen, falling after the appearance 

 of the new leaves in spring, oblong to obovate, 

 2)-7 mm. long usually obtuse at apex, entire, 

 often undulate or sinuate toothed, firm in tex- 

 ture, dark blue-green and glabrous or sparsely 

 pubescent above, pale beneath and pubescent 

 or glabrous; cup usually enclosing nearly half 

 the nut, light brown and puberulent within, its 

 scales light brown, tomentose, tuberculate to- 

 ward the base, the uppermost acute and ciliate ; 

 nut oblong to oval, dark chestnut brown, 20-25 

 mm. long. 



Foothills and valleys, LTpper Sonoran Zone; ex- 

 tending from Pasadena southward through the foot- 

 hills of San Diego County, California. Type locality: 

 "mountains of southern C'alifornia, from the mesas 

 east of -San Diego northward to Kern County." 



