MacDougal's Oak 



319 



are broadly ovoid, bluntish-pointed, about 1.5 mm. long and bright brown. The 

 leaves are obovate or broadly oblanceolate, 4 to 12 cm. long, shallowly 3 to 7- 

 lobed, the apex blunt or notched, tapering or wedge-shaped at the base, rather 

 thin, dark green or bluish, shining, with raised pale narrow midrib above, densely 

 finely hairy and silvery gray beneath, persistent until just before the new leaves 

 imfold; the leaf-stalk is 4 to 10 mm. long. The flowers appear in March or April, 

 the staminate in short hairy catkins, their calyx hairy and yellow, its lobes short 

 and broad; stamens 5 to 7, exserted, their anthers broadly oblong, notched, smooth 

 and yellow. The pistillate flowers are on short woolly stalks, their involucral 

 scales hairy; styles short, spreading and dull red. The fruit is sessile or nearly 

 so; nut oblong, 10 to 15 mm. long; cup saucer-shaped, 10 to 15 mm. across, em- 

 bracing about one fourth to one third of the nut, the scales close. 



The wood is hard and strong but brittle, close-grained and brown. 



It has been confused with Durand's oak, from which it differs in its broader, 

 usually more lobed and longer persistent leaves, and in the deeper cup of the 

 acorn. The older binomial Quercus San SabcBana Buckley may be the proper 

 name for this tree. 



36. MACDOUGAL'S OAK — Quercus paucaoba Rydberg 



This Uttle known species is reported only from central Arizona, where it grows 

 in rich soil along the banks of streams and attains a height of 5 meters. 



It has light gray bark, somewhat hairy, Ught brown to gray twigs, and small 

 brown buds. The leaves are 

 oval, ovate or rarely obovate 

 in outline, S to 8 cm. long; 

 the 5 to 7 lobes are triangu- 

 lar-ovate, blunt or sometimes 

 bristle-pointed or slightly 

 toothed; the sinuses are 

 broad, rather deep, rounded 

 at the bottom; the base is 

 broad, rounded, or sHghtly 

 heart-shaped. They are firm, 

 pale, bluish green, dull, and 

 fine hairy above, pale brownish, slightly hairy and finely reticulated beneath. The 

 fruit, ripening the first season, is stalked; nut ellipsoid or short-oblong, about 15 

 mm. long; cup hemispheric, 12 to 18 mm. across, embracing about one half of 

 the nut and covered by ovate tapering white-hairy corky scales. 



Fig. 273. — MacDougal's Oak. 



