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1. Quercus L. Oak. 
Moneecious. Aments slender. 4 perigo- 
nium 4-8-parted; ¢, 6-dentate; style short; 
stigmas 3. Ovary 3-celled, 6-ovulate, surround- 
ed by a scaly, budlike involucre, which in fruit 
enlarges into a cup.— b. 
1. 2. nopata Née. 4: aments pendulous; 
abortive ovules at the base of the developed 
seed; acorns maturing the first year; leaves 
deciduous; branchlets glabrous; nut conical. 
Common. Spring. 
“White oak.” ‘Roble.” Large, stately 
tree. 
2. Q. Dovatastr Hook. & Arn. ¢: aments 
pendulous; abortive ovules at the base of the 
developed seed; acorns maturing the first year; 
leaves deciduous; branchlets pubescent; nut 
oblong.—Niles. Sonoma. 
“« Blue oak.” 
3. Q. Dumosa Nutt. 4: aments pendulous; 
abortive ovules at the base of the developed 
seed; acorns maturing the first year; leaves 
persistent, coriaceous; nut oval.—Tamalpais. 
4, Q. CHRYSOLEPIS Liebm. 4: aments pen- 
dulous; abortive ovules scattered over the sur- 
face of the developed seed; acorns biennial; 
leaves persistent, coriaceous; nut obtuse.— 
_ Marin County. Spring. 
Tall tree, frequently called live oak. 
