302 CUPULIFEB^. 



* Stigmas nearly or quite sessile; bark usually light-colored; wood 

 nearly white; foliage of a dull or pale green. WHITE OAKS. 



-) Acorns ripening the first year; leaves deciduous. 



1. Q. lobata, Nee. Stately tree, with slender, often long and pendu- 

 lous branches: leaves oblong or obovate, 2^5 in. long, deeply lobed or 

 pinnatifid: acorns subsessile; nut long-conical, l%2% long, usually 

 pointed; cup deep-hemispherical, strongly taberculate. Plains of the 

 interior chiefly, but plentiful and of fine development in Napa Valley as 

 well as elsewhere in valleys of the Coast Eange. 



2. Q. Garryana, Dougl. Not as large as the last; branches not 

 drooping, but branchlets rigid, tomentose or pubescent: leaves more 

 coarsely lobed; lobes broad, obtuse; acorns sessile or short-peduncled; 

 nut oval, often ventricose, 1% ^%. in. long; cup small and shallow, with 

 small lanceolate slightly pubescent scales. A tree of the hilly districts 

 from Marin Co. northward. 



3. Q. Donglasii, Hook. & Arn. Middle-sized tree, or larger, with 

 rounded, or in age depressed head; branches and branchlets numerous; 

 bark of trunk very light-colored: leaves small (23 in. long), oblong, 

 sinuate or with shallow lobes, bluish-green above, pubescent beneath: 

 acorn sessile or short-peduncled; nut elongated-oblong, % 1)4 i n - loug* 

 mostly acutish; cup hemispherical, with ovate-lanceolate flat or some- 

 times tubercled scales Mostly inhabiting the first and rather dry foot- 

 hills of the inner ranges. 



f -t Acorns ripening the first year; leaves persistent. 



4:. Q. dumosa, Nutt. Shrub 48 ft. high, the slender branches 

 tomentose when young: leaves coriaceous, 1 in. long or more, oblong, 

 obtuse, often acutish at base, sinuate or sinuate-toothed, on young shoots 

 spinose-toothed, dark green above, pubescent beneath: acorns sessile, 

 variable in size; nut oval, 1 in. long more or less; cup deep-hemispher- 

 ical, 510 lines wide, usually strongly tuberculate, occasionally with flat 

 scales. Var. bnllata, Engelm. Leaves more rounded, convex above, 

 usually hoary-tomentose on both sides. A southern species, properly, 

 but reaching our borders in San Mateo Co., and even southern Alameda; 

 also recurring as far north as Lake Co., both type and variety. 



-) *- H Acorns biennial; trees evergreen. 



5. Q. chrysolepis, Liebm. Varying from the size of our largest 

 oaks, to mere shrub of a few feet high : leaves oblong, acute or cuspidate, 

 obtuse or subcordate at base, usually entire on old trees, sharply 

 spinose-dentate on more vigorous young trees or shoots, very pale and 

 glaucous above, fulvous-lomentose beneath when young, in age glabrate: 

 acorns extremely variable in size: nut oval, obtuse, ^ \% in. long; 

 cup hemispherical, with scales almost hidden by fulvous tomentum, and 



